Merge "GetCodeOwnerStatus: Allow to limit the number of returned statuses"
diff --git a/java/com/google/gerrit/plugins/codeowners/api/ChangeCodeOwners.java b/java/com/google/gerrit/plugins/codeowners/api/ChangeCodeOwners.java
index cd8aacb..12aebb4 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/ChangeCodeOwners.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/ChangeCodeOwners.java
@@ -16,6 +16,7 @@
 
 import com.google.gerrit.extensions.restapi.NotImplementedException;
 import com.google.gerrit.extensions.restapi.RestApiException;
+import java.util.Optional;
 
 /**
  * Java API for change code owners.
@@ -40,6 +41,39 @@
    * <p>Allows to set parameters on the request before executing it by calling {@link #get()}.
    */
   abstract class CodeOwnerStatusRequest {
+    private Integer start;
+    private Integer limit;
+
+    /**
+     * Sets a limit on the number of code owner statuses that should be returned.
+     *
+     * @param start number of code owner statuses to skip
+     */
+    public CodeOwnerStatusRequest withStart(int start) {
+      this.start = start;
+      return this;
+    }
+
+    /** Returns the number of code owner statuses to skip. */
+    public Optional<Integer> getStart() {
+      return Optional.ofNullable(start);
+    }
+
+    /**
+     * Sets a limit on the number of code owner statuses that should be returned.
+     *
+     * @param limit the limit
+     */
+    public CodeOwnerStatusRequest withLimit(int limit) {
+      this.limit = limit;
+      return this;
+    }
+
+    /** Returns the limit. */
+    public Optional<Integer> getLimit() {
+      return Optional.ofNullable(limit);
+    }
+
     /**
      * Executes this request and retrieves the code owner status.
      *
diff --git a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerStatusInfo.java b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerStatusInfo.java
index b10e2be..e9ae34d 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerStatusInfo.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerStatusInfo.java
@@ -34,4 +34,11 @@
 
   /** List of the code owner statuses for the files in the change. */
   public List<FileCodeOwnerStatusInfo> fileCodeOwnerStatuses;
+
+  /**
+   * Whether the request would deliver more results if not limited.
+   *
+   * <p>Not set if {@code false}.
+   */
+  public Boolean more;
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/api/impl/ChangeCodeOwnersImpl.java b/java/com/google/gerrit/plugins/codeowners/api/impl/ChangeCodeOwnersImpl.java
index 5a20f34..17c78cf 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/impl/ChangeCodeOwnersImpl.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/impl/ChangeCodeOwnersImpl.java
@@ -26,6 +26,7 @@
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.restapi.change.Revisions;
 import com.google.inject.Inject;
+import com.google.inject.Provider;
 import com.google.inject.assistedinject.Assisted;
 
 /** Implementation of the {@link ChangeCodeOwners} API. */
@@ -37,17 +38,17 @@
   private final Revisions revisions;
   private final RevisionCodeOwnersImpl.Factory revisionCodeOwnersApi;
   private final ChangeResource changeResource;
-  private final GetCodeOwnerStatus getCodeOwnerStatus;
+  private final Provider<GetCodeOwnerStatus> getCodeOwnerStatusProvider;
 
   @Inject
   public ChangeCodeOwnersImpl(
       Revisions revisions,
       RevisionCodeOwnersImpl.Factory revisionCodeOwnersApi,
-      GetCodeOwnerStatus getCodeOwnerStatus,
+      Provider<GetCodeOwnerStatus> getCodeOwnerStatusProvider,
       @Assisted ChangeResource changeResource) {
     this.revisions = revisions;
     this.revisionCodeOwnersApi = revisionCodeOwnersApi;
-    this.getCodeOwnerStatus = getCodeOwnerStatus;
+    this.getCodeOwnerStatusProvider = getCodeOwnerStatusProvider;
     this.changeResource = changeResource;
   }
 
@@ -57,6 +58,9 @@
       @Override
       public CodeOwnerStatusInfo get() throws RestApiException {
         try {
+          GetCodeOwnerStatus getCodeOwnerStatus = getCodeOwnerStatusProvider.get();
+          getStart().ifPresent(getCodeOwnerStatus::setStart);
+          getLimit().ifPresent(getCodeOwnerStatus::setLimit);
           return getCodeOwnerStatus.apply(changeResource).value();
         } catch (Exception e) {
           throw asRestApiException("Cannot get code owner status", e);
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
index 236e62a..4317c77 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
@@ -211,18 +211,28 @@
    * Gets the code owner statuses for all files/paths that were changed in the current revision of
    * the given change as a set.
    *
+   * @param start number of file statuses to skip
+   * @param limit the max number of file statuses that should be returned (0 = unlimited)
    * @see #getFileStatuses(CodeOwnerConfigHierarchy, ChangeNotes)
    */
-  public ImmutableSet<FileCodeOwnerStatus> getFileStatusesAsSet(ChangeNotes changeNotes)
+  public ImmutableSet<FileCodeOwnerStatus> getFileStatusesAsSet(
+      ChangeNotes changeNotes, int start, int limit)
       throws ResourceConflictException, IOException, PatchListNotAvailableException,
           DiffNotAvailableException {
     requireNonNull(changeNotes, "changeNotes");
     try (Timer0.Context ctx = codeOwnerMetrics.computeFileStatuses.start()) {
       logger.atFine().log(
-          "compute file statuses (project = %s, change = %d)",
-          changeNotes.getProjectName(), changeNotes.getChangeId().get());
-      return getFileStatuses(codeOwnerConfigHierarchyProvider.get(), changeNotes)
-          .collect(toImmutableSet());
+          "compute file statuses (project = %s, change = %d, start = %d, limit = %d)",
+          changeNotes.getProjectName(), changeNotes.getChangeId().get(), start, limit);
+      Stream<FileCodeOwnerStatus> fileStatuses =
+          getFileStatuses(codeOwnerConfigHierarchyProvider.get(), changeNotes);
+      if (start > 0) {
+        fileStatuses = fileStatuses.skip(start);
+      }
+      if (limit > 0) {
+        fileStatuses = fileStatuses.limit(limit);
+      }
+      return fileStatuses.collect(toImmutableSet());
     }
   }
 
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerStatus.java b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerStatus.java
index 34a1dfe..1952965 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerStatus.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerStatus.java
@@ -14,7 +14,10 @@
 
 package com.google.gerrit.plugins.codeowners.restapi;
 
+import static com.google.common.collect.ImmutableSet.toImmutableSet;
+
 import com.google.common.collect.ImmutableSet;
+import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.extensions.restapi.Response;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestReadView;
@@ -26,8 +29,8 @@
 import com.google.gerrit.server.patch.PatchListNotAvailableException;
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.inject.Inject;
-import com.google.inject.Singleton;
 import java.io.IOException;
+import org.kohsuke.args4j.Option;
 
 /**
  * REST endpoint that gets the code owner statuses for the files in a change.
@@ -49,10 +52,32 @@
  *       so that this approval can never happen)
  * </ul>
  */
-@Singleton
 public class GetCodeOwnerStatus implements RestReadView<ChangeResource> {
+  private static final int UNLIMITED = 0;
+
   private final CodeOwnerApprovalCheck codeOwnerApprovalCheck;
 
+  private int start;
+  private int limit;
+
+  @Option(
+      name = "--limit",
+      aliases = {"-n"},
+      metaVar = "CNT",
+      usage = "maximum number of file code owner statuses to return (by default 0 aka unlimited)")
+  public void setLimit(int limit) {
+    this.limit = limit;
+  }
+
+  @Option(
+      name = "--start",
+      aliases = {"-S"},
+      metaVar = "CNT",
+      usage = "number of owned paths to skip")
+  public void setStart(int start) {
+    this.start = start;
+  }
+
   @Inject
   public GetCodeOwnerStatus(CodeOwnerApprovalCheck codeOwnerApprovalCheck) {
     this.codeOwnerApprovalCheck = codeOwnerApprovalCheck;
@@ -62,10 +87,28 @@
   public Response<CodeOwnerStatusInfo> apply(ChangeResource changeResource)
       throws RestApiException, IOException, PermissionBackendException,
           PatchListNotAvailableException, DiffNotAvailableException {
+    validateStartAndLimit();
+
     ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(changeResource.getNotes());
-    return Response.ok(
+        codeOwnerApprovalCheck.getFileStatusesAsSet(
+            changeResource.getNotes(), start, limit == UNLIMITED ? UNLIMITED : limit + 1);
+    CodeOwnerStatusInfo codeOwnerStatusInfo =
         CodeOwnerStatusInfoJson.format(
-            changeResource.getNotes().getCurrentPatchSet().id(), fileCodeOwnerStatuses));
+            changeResource.getNotes().getCurrentPatchSet().id(),
+            limit == UNLIMITED
+                ? fileCodeOwnerStatuses
+                : fileCodeOwnerStatuses.stream().limit(limit).collect(toImmutableSet()));
+    codeOwnerStatusInfo.more =
+        limit != UNLIMITED && fileCodeOwnerStatuses.size() > limit ? true : null;
+    return Response.ok(codeOwnerStatusInfo);
+  }
+
+  private void validateStartAndLimit() throws BadRequestException {
+    if (start < 0) {
+      throw new BadRequestException("start cannot be negative");
+    }
+    if (limit < 0) {
+      throw new BadRequestException("limit cannot be negative");
+    }
   }
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerStatusInfoSubject.java b/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerStatusInfoSubject.java
index 6bd2e07..a0b3452 100644
--- a/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerStatusInfoSubject.java
+++ b/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerStatusInfoSubject.java
@@ -18,6 +18,7 @@
 import static com.google.gerrit.plugins.codeowners.testing.FileCodeOwnerStatusInfoSubject.fileCodeOwnerStatusInfos;
 import static com.google.gerrit.truth.ListSubject.elements;
 
+import com.google.common.truth.BooleanSubject;
 import com.google.common.truth.FailureMetadata;
 import com.google.common.truth.IntegerSubject;
 import com.google.common.truth.Subject;
@@ -57,11 +58,15 @@
   /** Returns a {@link ListSubject} for the file code owner statuses. */
   public ListSubject<FileCodeOwnerStatusInfoSubject, FileCodeOwnerStatusInfo>
       hasFileCodeOwnerStatusesThat() {
-    return check("fileCodeOwnerStatuses")
+    return check("fileCodeOwnerStatuses()")
         .about(elements())
         .thatCustom(codeOwnerStatusInfo().fileCodeOwnerStatuses, fileCodeOwnerStatusInfos());
   }
 
+  public BooleanSubject hasMoreThat() {
+    return check("more()").that(codeOwnerStatusInfo().more);
+  }
+
   private CodeOwnerStatusInfo codeOwnerStatusInfo() {
     isNotNull();
     return codeOwnerStatusInfo;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerStatusIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerStatusIT.java
index 04eb2fd..d8c51e6 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerStatusIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerStatusIT.java
@@ -14,19 +14,26 @@
 
 package com.google.gerrit.plugins.codeowners.acceptance.api;
 
+import static com.google.common.truth.Truth.assertThat;
 import static com.google.gerrit.plugins.codeowners.testing.CodeOwnerStatusInfoSubject.assertThat;
 import static com.google.gerrit.plugins.codeowners.testing.FileCodeOwnerStatusInfoSubject.isFileCodeOwnerStatus;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 
+import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.acceptance.PushOneCommit;
 import com.google.gerrit.acceptance.TestAccount;
 import com.google.gerrit.acceptance.config.GerritConfig;
 import com.google.gerrit.acceptance.testsuite.request.RequestScopeOperations;
+import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersIT;
 import com.google.gerrit.plugins.codeowners.api.CodeOwnerStatusInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnersExperimentFeaturesConstants;
 import com.google.gerrit.plugins.codeowners.backend.FileCodeOwnerStatus;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerStatus;
+import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.inject.Inject;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import org.junit.Test;
 
 /**
@@ -67,6 +74,360 @@
         .hasFileCodeOwnerStatusesThat()
         .comparingElementsUsing(isFileCodeOwnerStatus())
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
+    assertThat(codeOwnerStatus).hasMoreThat().isNull();
+  }
+
+  @Test
+  public void getStatusWithStart() throws Exception {
+    TestAccount user2 = accountCreator.user2();
+
+    codeOwnerConfigOperations
+        .newCodeOwnerConfig()
+        .project(project)
+        .branch("master")
+        .folderPath("/foo/")
+        .addCodeOwnerEmail(user.email())
+        .create();
+
+    String path1 = "/foo/bar/baz.md";
+    String path2 = "/foo/baz/bar.md";
+    String path3 = "/bar/foo.md";
+    String path4 = "/bar/baz.md";
+
+    PushOneCommit.Result r =
+        createChange(
+            "Change Adding A File",
+            ImmutableMap.of(
+                JgitPath.of(path1).get(),
+                "file content",
+                JgitPath.of(path2).get(),
+                "file content",
+                JgitPath.of(path3).get(),
+                "file content",
+                JgitPath.of(path4).get(),
+                "file content"));
+    String changeId = r.getChangeId();
+
+    // Add a reviewer that is a code owner.
+    gApi.changes().id(changeId).addReviewer(user.email());
+
+    // Add a Code-Review+1 (= code owner approval) from a user that is not a code owner.
+    requestScopeOperations.setApiUser(user2.id());
+    recommend(changeId);
+
+    CodeOwnerStatusInfo codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withStart(0).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path4, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING),
+            FileCodeOwnerStatus.addition(path2, CodeOwnerStatus.PENDING))
+        .inOrder();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withStart(1).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING),
+            FileCodeOwnerStatus.addition(path2, CodeOwnerStatus.PENDING))
+        .inOrder();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withStart(2).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING),
+            FileCodeOwnerStatus.addition(path2, CodeOwnerStatus.PENDING))
+        .inOrder();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withStart(3).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(FileCodeOwnerStatus.addition(path2, CodeOwnerStatus.PENDING));
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withStart(4).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus).hasFileCodeOwnerStatusesThat().isEmpty();
+  }
+
+  @Test
+  public void getStatusWithLimit() throws Exception {
+    TestAccount user2 = accountCreator.user2();
+
+    codeOwnerConfigOperations
+        .newCodeOwnerConfig()
+        .project(project)
+        .branch("master")
+        .folderPath("/foo/")
+        .addCodeOwnerEmail(user.email())
+        .create();
+
+    String path1 = "/foo/bar/baz.md";
+    String path2 = "/foo/baz/bar.md";
+    String path3 = "/bar/foo.md";
+    String path4 = "/bar/baz.md";
+
+    PushOneCommit.Result r =
+        createChange(
+            "Change Adding A File",
+            ImmutableMap.of(
+                JgitPath.of(path1).get(),
+                "file content",
+                JgitPath.of(path2).get(),
+                "file content",
+                JgitPath.of(path3).get(),
+                "file content",
+                JgitPath.of(path4).get(),
+                "file content"));
+    String changeId = r.getChangeId();
+
+    // Add a reviewer that is a code owner.
+    gApi.changes().id(changeId).addReviewer(user.email());
+
+    // Add a Code-Review+1 (= code owner approval) from a user that is not a code owner.
+    requestScopeOperations.setApiUser(user2.id());
+    recommend(changeId);
+
+    CodeOwnerStatusInfo codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(1).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path4, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
+    assertThat(codeOwnerStatus).hasMoreThat().isTrue();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(2).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path4, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS))
+        .inOrder();
+    assertThat(codeOwnerStatus).hasMoreThat().isTrue();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(3).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path4, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING))
+        .inOrder();
+    assertThat(codeOwnerStatus).hasMoreThat().isTrue();
+
+    codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(4).get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path4, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING),
+            FileCodeOwnerStatus.addition(path2, CodeOwnerStatus.PENDING))
+        .inOrder();
+    assertThat(codeOwnerStatus).hasMoreThat().isNull();
+  }
+
+  @Test
+  public void getStatusWithLimitForRename() throws Exception {
+    testGetStatusWithLimitForRenamedFile(/* useDiffCache= */ false);
+  }
+
+  @Test
+  @GerritConfig(
+      name = "experiments.enabled",
+      value = CodeOwnersExperimentFeaturesConstants.USE_DIFF_CACHE)
+  public void getStatusWithLimitForRename_useDiffCache() throws Exception {
+    testGetStatusWithLimitForRenamedFile(/* useDiffCache= */ true);
+  }
+
+  private void testGetStatusWithLimitForRenamedFile(boolean useDiffCache) throws Exception {
+    codeOwnerConfigOperations
+        .newCodeOwnerConfig()
+        .project(project)
+        .branch("master")
+        .folderPath("/foo/")
+        .addCodeOwnerEmail(user.email())
+        .create();
+
+    Path oldPath = Paths.get("/foo/old.bar");
+    Path newPath = Paths.get("/bar/new.bar");
+    String changeId = createChangeWithFileRename(oldPath, newPath);
+
+    // Add a reviewer that is a code owner of the old path.
+    gApi.changes().id(changeId).addReviewer(user.email());
+
+    CodeOwnerStatusInfo codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(1).get();
+    if (useDiffCache) {
+      assertThat(codeOwnerStatus)
+          .hasFileCodeOwnerStatusesThat()
+          .comparingElementsUsing(isFileCodeOwnerStatus())
+          .containsExactly(
+              FileCodeOwnerStatus.rename(
+                  oldPath,
+                  CodeOwnerStatus.PENDING,
+                  newPath,
+                  CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
+      assertThat(codeOwnerStatus).hasMoreThat().isNull();
+    } else {
+      assertThat(codeOwnerStatus)
+          .hasFileCodeOwnerStatusesThat()
+          .comparingElementsUsing(isFileCodeOwnerStatus())
+          .containsExactly(
+              FileCodeOwnerStatus.addition(newPath, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
+      assertThat(codeOwnerStatus).hasMoreThat().isTrue();
+
+      codeOwnerStatus =
+          changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(2).get();
+      assertThat(codeOwnerStatus)
+          .hasFileCodeOwnerStatusesThat()
+          .comparingElementsUsing(isFileCodeOwnerStatus())
+          .containsExactly(
+              FileCodeOwnerStatus.addition(newPath, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+              FileCodeOwnerStatus.deletion(oldPath, CodeOwnerStatus.PENDING));
+      assertThat(codeOwnerStatus).hasMoreThat().isNull();
+    }
+  }
+
+  @Test
+  public void getStatusWithStartAndLimit() throws Exception {
+    TestAccount user2 = accountCreator.user2();
+
+    codeOwnerConfigOperations
+        .newCodeOwnerConfig()
+        .project(project)
+        .branch("master")
+        .folderPath("/foo/")
+        .addCodeOwnerEmail(user.email())
+        .create();
+
+    String path1 = "/foo/bar/baz.md";
+    String path2 = "/foo/baz/bar.md";
+    String path3 = "/bar/foo.md";
+    String path4 = "/bar/baz.md";
+
+    PushOneCommit.Result r =
+        createChange(
+            "Change Adding A File",
+            ImmutableMap.of(
+                JgitPath.of(path1).get(),
+                "file content",
+                JgitPath.of(path2).get(),
+                "file content",
+                JgitPath.of(path3).get(),
+                "file content",
+                JgitPath.of(path4).get(),
+                "file content"));
+    String changeId = r.getChangeId();
+
+    // Add a reviewer that is a code owner.
+    gApi.changes().id(changeId).addReviewer(user.email());
+
+    // Add a Code-Review+1 (= code owner approval) from a user that is not a code owner.
+    requestScopeOperations.setApiUser(user2.id());
+    recommend(changeId);
+
+    CodeOwnerStatusInfo codeOwnerStatus =
+        changeCodeOwnersApiFactory
+            .change(changeId)
+            .getCodeOwnerStatus()
+            .withStart(1)
+            .withLimit(2)
+            .get();
+    assertThat(codeOwnerStatus)
+        .hasPatchSetNumberThat()
+        .isEqualTo(r.getChange().currentPatchSet().id().get());
+    assertThat(codeOwnerStatus)
+        .hasFileCodeOwnerStatusesThat()
+        .comparingElementsUsing(isFileCodeOwnerStatus())
+        .containsExactly(
+            FileCodeOwnerStatus.addition(path3, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
+            FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.PENDING))
+        .inOrder();
+    assertThat(codeOwnerStatus).hasMoreThat().isTrue();
+  }
+
+  @Test
+  public void startCannotBeNegative() throws Exception {
+    String changeId = createChange().getChangeId();
+    BadRequestException exception =
+        assertThrows(
+            BadRequestException.class,
+            () ->
+                changeCodeOwnersApiFactory
+                    .change(changeId)
+                    .getCodeOwnerStatus()
+                    .withStart(-1)
+                    .get());
+    assertThat(exception).hasMessageThat().isEqualTo("start cannot be negative");
+  }
+
+  @Test
+  public void limitCannotBeNegative() throws Exception {
+    String changeId = createChange().getChangeId();
+    BadRequestException exception =
+        assertThrows(
+            BadRequestException.class,
+            () ->
+                changeCodeOwnersApiFactory
+                    .change(changeId)
+                    .getCodeOwnerStatus()
+                    .withLimit(-1)
+                    .get());
+    assertThat(exception).hasMessageThat().isEqualTo("limit cannot be negative");
+  }
+
+  @Test
+  public void getStatusWithoutLimit() throws Exception {
+    String changeId = createChange().getChangeId();
+    CodeOwnerStatusInfo codeOwnerStatus =
+        changeCodeOwnersApiFactory.change(changeId).getCodeOwnerStatus().withLimit(0).get();
+    assertThat(codeOwnerStatus).hasFileCodeOwnerStatusesThat().isNotEmpty();
+    assertThat(codeOwnerStatus).hasMoreThat().isNull();
   }
 
   @Test
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/GetCodeOwnerStatusRestIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/GetCodeOwnerStatusRestIT.java
index a4e6437..8f4959d 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/GetCodeOwnerStatusRestIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/GetCodeOwnerStatusRestIT.java
@@ -88,6 +88,28 @@
                 filePath, project.get()));
   }
 
+  @Test
+  public void cannotGetStatusWithInvalidStart() throws Exception {
+    String changeId = createChange().getChangeId();
+    RestResponse r =
+        adminRestSession.get(
+            String.format(
+                "/changes/%s/code_owners.status?start=invalid", IdString.fromDecoded(changeId)));
+    r.assertBadRequest();
+    assertThat(r.getEntityContent()).contains("\"invalid\" is not a valid value for \"--start\"");
+  }
+
+  @Test
+  public void cannotGetStatusWithInvalidLimit() throws Exception {
+    String changeId = createChange().getChangeId();
+    RestResponse r =
+        adminRestSession.get(
+            String.format(
+                "/changes/%s/code_owners.status?limit=invalid", IdString.fromDecoded(changeId)));
+    r.assertBadRequest();
+    assertThat(r.getEntityContent()).contains("\"invalid\" is not a valid value for \"--limit\"");
+  }
+
   private CodeOwnerConfig.Key createCodeOwnerConfigKey(String folderPath) {
     return CodeOwnerConfig.Key.create(project, "master", folderPath);
   }
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckTest.java
index 6c6b0f2..566c5cd 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckTest.java
@@ -79,7 +79,9 @@
     NullPointerException npe =
         assertThrows(
             NullPointerException.class,
-            () -> codeOwnerApprovalCheck.getFileStatusesAsSet(/* changeNotes= */ null));
+            () ->
+                codeOwnerApprovalCheck.getFileStatusesAsSet(
+                    /* changeNotes= */ null, /* start= */ 0, /* limit= */ 0));
     assertThat(npe).hasMessageThat().isEqualTo("changeNotes");
   }
 
@@ -98,8 +100,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -122,8 +123,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.modification(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -143,8 +143,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.deletion(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -178,8 +177,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -213,8 +211,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
   }
@@ -238,8 +235,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.modification(path, CodeOwnerStatus.PENDING));
   }
@@ -260,8 +256,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.deletion(path, CodeOwnerStatus.PENDING));
   }
@@ -295,8 +290,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -342,8 +336,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -372,8 +365,7 @@
     requestScopeOperations.setApiUser(user.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -392,8 +384,7 @@
     requestScopeOperations.setApiUser(user.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.modification(path, CodeOwnerStatus.APPROVED));
   }
@@ -409,8 +400,7 @@
     requestScopeOperations.setApiUser(user.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.deletion(path, CodeOwnerStatus.APPROVED));
   }
@@ -440,8 +430,7 @@
     requestScopeOperations.setApiUser(user.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -483,8 +472,7 @@
     requestScopeOperations.setApiUser(user.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -523,8 +511,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(
@@ -559,8 +546,7 @@
             .getChangeId();
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.modification(
@@ -591,8 +577,7 @@
     String changeId = createChangeWithFileDeletion(path);
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.deletion(
@@ -647,8 +632,7 @@
     String changeId = createChangeWithFileRename(oldPath, newPath);
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -716,8 +700,7 @@
     String changeId = createChangeWithFileRename(oldPath, newPath);
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     if (useDiffCache) {
       assertThatCollection(fileCodeOwnerStatuses)
           .containsExactly(
@@ -750,8 +733,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -771,8 +753,7 @@
     amendChange(user, changeId);
     amendChange(user2, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -797,8 +778,7 @@
 
     // Verify that the file is not approved yet (the change owner is a code owner, but
     // implicit approvals are disabled).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -808,7 +788,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -840,8 +820,7 @@
     String changeId =
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(
@@ -869,8 +848,7 @@
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS (since there is no implicit
     // approval by default).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -879,7 +857,7 @@
     gApi.changes().id(changeId).addReviewer(user.email());
 
     // Check that the status of the file is PENDING now.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
   }
@@ -898,8 +876,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -915,7 +892,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -943,8 +920,7 @@
         createChange(bot, "Change Adding A File", JgitPath.of(path).get(), "file content")
             .getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(
@@ -968,8 +944,7 @@
             .getChangeId();
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -979,7 +954,7 @@
 
     // Check that the status of the file is PENDING now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
 
@@ -994,7 +969,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1010,8 +985,7 @@
 
     // Verify that the file is not approved yet (the change owner is a global code owner, but
     // implicit approvals are disabled).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1021,7 +995,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1048,8 +1022,7 @@
     String changeId =
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(
@@ -1069,8 +1042,7 @@
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS (since there is no implicit
     // approval by default).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1079,7 +1051,7 @@
     gApi.changes().id(changeId).addReviewer(user.email());
 
     // Check that the status of the file is PENDING now.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
   }
@@ -1106,8 +1078,7 @@
     // Add code owner from a lower level as reviewer.
     gApi.changes().id(changeId).addReviewer(user2.email());
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     // The expected status is APPROVED since 'user' which is configured as code owner on the root
     // level approved the change.
     assertThatCollection(fileCodeOwnerStatuses)
@@ -1136,8 +1107,7 @@
             .getChangeId();
 
     // Without Owners-Override approval the expected status is INSUFFICIENT_REVIEWERS.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
@@ -1147,7 +1117,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 1));
 
     // With Owners-Override approval the expected status is APPROVED.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.APPROVED),
@@ -1179,8 +1149,7 @@
             .getChangeId();
 
     // Without override approval the expected status is INSUFFICIENT_REVIEWERS.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
@@ -1190,7 +1159,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 1));
 
     // With override approval the expected status is APPROVED.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.APPROVED),
@@ -1200,7 +1169,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 0));
 
     // Without override approval the expected status is INSUFFICIENT_REVIEWERS.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.INSUFFICIENT_REVIEWERS),
@@ -1210,7 +1179,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Another-Override", 1));
 
     // With override approval the expected status is APPROVED.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path1, CodeOwnerStatus.APPROVED),
@@ -1343,9 +1312,7 @@
     gApi.projects().name(project.get()).deleteBranches(input);
 
     ResourceConflictException exception =
-        assertThrows(
-            ResourceConflictException.class,
-            () -> codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId)));
+        assertThrows(ResourceConflictException.class, () -> getFileCodeOwnerStatuses(changeId));
     assertThat(exception).hasMessageThat().isEqualTo("destination branch not found");
   }
 
@@ -1363,8 +1330,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1380,7 +1346,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
 
@@ -1400,7 +1366,7 @@
         .isEqualTo(user.email());
 
     // Check that the file is still approved.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1422,8 +1388,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1433,7 +1398,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
 
@@ -1452,7 +1417,7 @@
         .isEqualTo(admin.email());
 
     // Check that the file is still approved.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1471,8 +1436,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1488,7 +1452,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1523,8 +1487,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1535,7 +1498,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1553,8 +1516,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1570,7 +1532,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1595,8 +1557,7 @@
         createChange(user, "Change Adding A File", JgitPath.of(path).get(), "file content")
             .getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -1622,8 +1583,7 @@
             .getChangeId();
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1633,7 +1593,7 @@
 
     // Check that the status of the file is PENDING now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.PENDING));
 
@@ -1648,7 +1608,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
@@ -1668,7 +1628,7 @@
 
     // Check that the file is not approved.
     ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeIdOfRevert));
+        getFileCodeOwnerStatuses(changeIdOfRevert);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.deletion(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1690,7 +1650,7 @@
 
     // Check that the file is approved since it's a pure revert.
     ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeIdOfRevert));
+        getFileCodeOwnerStatuses(changeIdOfRevert);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.deletion(path, CodeOwnerStatus.APPROVED));
   }
@@ -1726,7 +1686,7 @@
 
     // Check that the file is not approved.
     ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(revertChange.changeId));
+        getFileCodeOwnerStatuses(revertChange.changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.modification(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -1746,8 +1706,7 @@
 
     // Check that the file is approved since the uploader is exempted from requiring code owner
     // approvals.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
 
@@ -1757,12 +1716,18 @@
 
     // Check that the file is no longer approved since the uploader is not exempted from requiring
     // code owner approvals.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
   }
 
+  private ImmutableSet<FileCodeOwnerStatus> getFileCodeOwnerStatuses(String changeId)
+      throws Exception {
+    return codeOwnerApprovalCheck.getFileStatusesAsSet(
+        getChangeNotes(changeId), /* start= */ 0, /* limit= */ 0);
+  }
+
   private ChangeNotes getChangeNotes(String changeId) throws Exception {
     return changeNotesFactory.create(project, Change.id(gApi.changes().id(changeId).get()._number));
   }
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
index dc87ef7..08052d8 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
@@ -76,8 +76,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -92,7 +91,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -107,7 +106,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -130,8 +129,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -157,8 +155,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -173,7 +170,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -188,7 +185,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -215,8 +212,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -235,8 +231,7 @@
 
     // Verify that the file is not approved yet (the change owner is a code owner, but
     // implicit approvals are disabled).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -250,7 +245,7 @@
     gApi.changes().id(changeId).addReviewer(user.email());
 
     // Verify that the status is pending now .
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -264,7 +259,7 @@
     recommend(changeId);
 
     // Verify that the status is approved now
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -283,8 +278,7 @@
 
     // Verify that the file is approved (the change owner is a code owner and implicit approvals are
     // enabled).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -310,8 +304,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -326,7 +319,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -341,7 +334,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -367,8 +360,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -395,8 +387,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -411,7 +402,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -426,7 +417,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -453,8 +444,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -486,8 +476,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -502,7 +491,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -517,7 +506,7 @@
 
     // Verify that the file is not approved (fallback code owner doesn't apply since a code owner is
     // defined).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -550,8 +539,7 @@
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -562,6 +550,12 @@
         .isEqualTo(CodeOwnerStatus.INSUFFICIENT_REVIEWERS);
   }
 
+  private ImmutableSet<FileCodeOwnerStatus> getFileCodeOwnerStatuses(String changeId)
+      throws Exception {
+    return codeOwnerApprovalCheck.getFileStatusesAsSet(
+        getChangeNotes(changeId), /* start= */ 0, /* limit= */ 0);
+  }
+
   private ChangeNotes getChangeNotes(String changeId) throws Exception {
     return changeNotesFactory.create(project, Change.id(gApi.changes().id(changeId).get()._number));
   }
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithProjectOwnersAsFallbackCodeOwnersTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithProjectOwnersAsFallbackCodeOwnersTest.java
index d17d51b..68382f9 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithProjectOwnersAsFallbackCodeOwnersTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithProjectOwnersAsFallbackCodeOwnersTest.java
@@ -83,8 +83,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -105,7 +104,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -138,8 +137,7 @@
         createChange(bot, "Change Adding A File", JgitPath.of(path).get(), "file content")
             .getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -167,8 +165,7 @@
             .getChangeId();
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -183,7 +180,7 @@
 
     // Check that the status of the file is PENDING now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -203,7 +200,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -224,8 +221,7 @@
 
     // Verify that the file is not approved yet (the change owner is a global code owner, but
     // implicit approvals are disabled).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -240,7 +236,7 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -272,8 +268,7 @@
     String changeId =
         createChange("Change Adding A File", JgitPath.of(path).get(), "file content").getChangeId();
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -297,8 +292,7 @@
 
     // Verify that the status of the file is INSUFFICIENT_REVIEWERS (since there is no implicit
     // approval by default).
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -312,7 +306,7 @@
     gApi.changes().id(changeId).addReviewer(user.email());
 
     // Check that the status of the file is PENDING now.
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -341,8 +335,7 @@
     requestScopeOperations.setApiUser(user3.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -373,8 +366,7 @@
     requestScopeOperations.setApiUser(user2.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -400,8 +392,7 @@
     requestScopeOperations.setApiUser(admin.id());
     recommend(changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -437,8 +428,7 @@
     // Amend change with a user that is a project owner.
     amendChange(admin, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -466,8 +456,7 @@
     // Amend change with a user that is not a project owner.
     amendChange(user, changeId);
 
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -501,8 +490,7 @@
             .getChangeId();
 
     // Without Owners-Override approval the expected status is INSUFFICIENT_REVIEWERS.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -514,8 +502,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 1));
 
     // With Owners-Override approval the expected status is APPROVED.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -547,8 +534,7 @@
             .getChangeId();
 
     // Without override approval the expected status is INSUFFICIENT_REVIEWERS.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -561,8 +547,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 1));
 
     // With override approval the expected status is APPROVED.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -574,8 +559,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 0));
 
     // Without override approval the expected status is INSUFFICIENT_REVIEWERS.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -587,8 +571,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Another-Override", 1));
 
     // With override approval the expected status is APPROVED.
-    for (FileCodeOwnerStatus fileCodeOwnerStatus :
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId))) {
+    for (FileCodeOwnerStatus fileCodeOwnerStatus : getFileCodeOwnerStatuses(changeId)) {
       assertThat(fileCodeOwnerStatus)
           .hasNewPathStatus()
           .value()
@@ -610,8 +593,7 @@
             .getChangeId();
 
     // Verify that the file is not approved yet.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -621,7 +603,7 @@
     approve(changeId);
 
     // Verify that the file is not approved yet
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(
             FileCodeOwnerStatus.addition(path, CodeOwnerStatus.INSUFFICIENT_REVIEWERS));
@@ -637,11 +619,17 @@
 
     // Check that the file is approved now.
     requestScopeOperations.setApiUser(admin.id());
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     assertThatCollection(fileCodeOwnerStatuses)
         .containsExactly(FileCodeOwnerStatus.addition(path, CodeOwnerStatus.APPROVED));
   }
 
+  private ImmutableSet<FileCodeOwnerStatus> getFileCodeOwnerStatuses(String changeId)
+      throws Exception {
+    return codeOwnerApprovalCheck.getFileStatusesAsSet(
+        getChangeNotes(changeId), /* start= */ 0, /* limit= */ 0);
+  }
+
   private ChangeNotes getChangeNotes(String changeId) throws Exception {
     return changeNotesFactory.create(project, Change.id(gApi.changes().id(changeId).get()._number));
   }
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
index a27bde9..6cdf2b1 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
@@ -83,8 +83,7 @@
             .getChangeId();
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -99,7 +98,7 @@
     recommend(changeId);
 
     // Verify that the file is not approved (since self approvals are ignored).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -125,8 +124,7 @@
     amendChange(admin, changeId);
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -142,7 +140,7 @@
 
     // Verify that the file is approved now (since the change owner is not the uploader of the
     // current patch set).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -172,8 +170,7 @@
     amendChange(codeOwner, changeId);
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -188,7 +185,7 @@
 
     // Verify that the file is not pending (the code owner is the uploader of the current patch set
     // and self approvals are ignored).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -203,7 +200,7 @@
 
     // Verify that the file is not approved (since the code owner is the uploader of the current
     // patch set and self approvals are ignored).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -227,8 +224,7 @@
             .getChangeId();
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -260,8 +256,7 @@
     amendChange(codeOwner, changeId);
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -286,8 +281,7 @@
             .getChangeId();
 
     // Verify that the file is approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -319,8 +313,7 @@
     amendChange(codeOwner, changeId);
 
     // Verify that the file is approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -343,8 +336,7 @@
             .getChangeId();
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -360,7 +352,7 @@
 
     // Verify that the file is not approved (since self approvals on the override label are
     // ignored).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -385,8 +377,7 @@
     amendChange(admin, changeId);
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -402,7 +393,7 @@
 
     // Verify that the file is approved now (since the change owner is not the uploader of the
     // current patch set and hence the override counts).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -427,8 +418,7 @@
     amendChange(admin, changeId);
 
     // Verify that the file is not approved.
-    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses =
-        codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    ImmutableSet<FileCodeOwnerStatus> fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     FileCodeOwnerStatusSubject fileCodeOwnerStatusSubject =
         assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
@@ -442,7 +432,7 @@
     gApi.changes().id(changeId).current().review(new ReviewInput().label("Owners-Override", 1));
 
     // Verify that the file is not approved (since the override from the uploader is ignored).
-    fileCodeOwnerStatuses = codeOwnerApprovalCheck.getFileStatusesAsSet(getChangeNotes(changeId));
+    fileCodeOwnerStatuses = getFileCodeOwnerStatuses(changeId);
     fileCodeOwnerStatusSubject = assertThatCollection(fileCodeOwnerStatuses).onlyElement();
     fileCodeOwnerStatusSubject.hasNewPathStatus().value().hasPathThat().isEqualTo(path);
     fileCodeOwnerStatusSubject
@@ -452,6 +442,12 @@
         .isEqualTo(CodeOwnerStatus.INSUFFICIENT_REVIEWERS);
   }
 
+  private ImmutableSet<FileCodeOwnerStatus> getFileCodeOwnerStatuses(String changeId)
+      throws Exception {
+    return codeOwnerApprovalCheck.getFileStatusesAsSet(
+        getChangeNotes(changeId), /* start= */ 0, /* limit= */ 0);
+  }
+
   private ChangeNotes getChangeNotes(String changeId) throws Exception {
     return changeNotesFactory.create(project, Change.id(gApi.changes().id(changeId).get()._number));
   }
diff --git a/resources/Documentation/rest-api.md b/resources/Documentation/rest-api.md
index be963ff..461232e 100644
--- a/resources/Documentation/rest-api.md
+++ b/resources/Documentation/rest-api.md
@@ -604,6 +604,13 @@
 The code owner statuses are always listed for the files in the current revision
 of the change (latest patch set).
 
+The following request parameters can be specified:
+
+| Field Name   |           | Description |
+| ------------ | --------- | ----------- |
+| `start`\|`S` | optional  | Number of file code owner statuses to skip. Allows to page over the file code owner statuses. By default 0.
+| `limit`\|`n` | optional  | Limit defining how many file code owner statuses should be returned at most. By default 0 (= unlimited).
+
 The code owner statuses are returned as a
 [CodeOwnerStatusInfo](#code-owner-status-info) entity.
 
@@ -939,10 +946,11 @@
 The `CodeOwnerStatusInfo` entity describes the code owner statuses for the files
 in a change.
 
-| Field Name         | Description |
-| ------------------ | ----------- |
-| `patch_set_number` | The number of the patch set for which the code owner statuses are returned.
-| `file_code_owner_statuses` | List of the code owner statuses for the files in the change as [FileCodeOwnerStatusInfo](#file-code-owner-status-info) entities, sorted by new path, then old path.
+| Field Name         |          | Description |
+| ------------------ | -------- | ----------- |
+| `patch_set_number` |          | The number of the patch set for which the code owner statuses are returned.
+| `file_code_owner_statuses` |  | List of the code owner statuses for the files in the change as [FileCodeOwnerStatusInfo](#file-code-owner-status-info) entities, sorted by new path, then old path.
+| `more`             | optional | Whether the request would deliver more results if not limited. Not set if `false`.
 
 ### <a id="code-owners-status-info"> CodeOwnersStatusInfo
 The `CodeOwnersStatusInfo` contains information about whether the code owners