// Copyright (C) 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.gerrit.plugins.codeowners.acceptance.api;

import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.plugins.codeowners.testing.OwnedChangedFileInfoSubject.assertThat;
import static com.google.gerrit.plugins.codeowners.testing.OwnedPathsInfoSubject.assertThat;
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.PushOneCommit.Result;
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.api.changes.PublishChangeEditInput;
import com.google.gerrit.extensions.common.ChangeInput;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersIT;
import com.google.gerrit.plugins.codeowners.api.OwnedPathsInfo;
import com.google.gerrit.plugins.codeowners.restapi.GetOwnedPaths;
import com.google.gerrit.plugins.codeowners.util.JgitPath;
import com.google.inject.Inject;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.junit.Test;

/**
 * Acceptance test for the {@link com.google.gerrit.plugins.codeowners.restapi.GetOwnedPaths} REST
 * endpoint.
 *
 * <p>Further tests for the {@link com.google.gerrit.plugins.codeowners.restapi.GetOwnedPaths} REST
 * endpoint that require using the REST API are implemented in {@link
 * com.google.gerrit.plugins.codeowners.acceptance.restapi.GetOwnedPathRestIT}.
 */
public class GetOwnedPathsIT extends AbstractCodeOwnersIT {
  @Inject private RequestScopeOperations requestScopeOperations;

  @Test
  public void getOwnedPathRequiresUser() throws Exception {
    String changeId = createChange().getChangeId();
    BadRequestException exception =
        assertThrows(
            BadRequestException.class,
            () ->
                changeCodeOwnersApiFactory
                    .change(changeId)
                    .current()
                    .getOwnedPaths()
                    .forUser(/* user= */ null)
                    .get());
    assertThat(exception).hasMessageThat().isEqualTo("--user required");
  }

  @Test
  public void cannotGetOwnedPathForNonExistingUser() throws Exception {
    String nonExistingUser = "non-existing";
    String changeId = createChange().getChangeId();
    UnprocessableEntityException exception =
        assertThrows(
            UnprocessableEntityException.class,
            () ->
                changeCodeOwnersApiFactory
                    .change(changeId)
                    .current()
                    .getOwnedPaths()
                    .forUser(nonExistingUser)
                    .get());
    assertThat(exception)
        .hasMessageThat()
        .isEqualTo(String.format("Account '%s' not found", nonExistingUser));
  }

  @Test
  @GerritConfig(name = "accounts.visibility", value = "SAME_GROUP")
  public void cannotGetOwnedPathForNonVisibleUser() throws Exception {
    TestAccount nonVisibleUser =
        accountCreator.create(
            "nonVisibleUser",
            "nonVisibleUser@example.com",
            "Non-Visible User",
            /* displayName= */ null);
    String changeId = createChange().getChangeId();
    requestScopeOperations.setApiUser(user.id());
    UnprocessableEntityException exception =
        assertThrows(
            UnprocessableEntityException.class,
            () ->
                changeCodeOwnersApiFactory
                    .change(changeId)
                    .current()
                    .getOwnedPaths()
                    .forUser(nonVisibleUser.email())
                    .get());
    assertThat(exception)
        .hasMessageThat()
        .isEqualTo(String.format("Account '%s' not found", nonVisibleUser.email()));
  }

  @Test
  public void getOwnedPaths() throws Exception {
    setAsCodeOwners("/foo/", user);

    String path1 = "/foo/bar/baz.md";
    String path2 = "/foo/baz/bar.md";
    String path3 = "/bar/foo.md";

    String changeId =
        createChange(
                "test change",
                ImmutableMap.of(
                    JgitPath.of(path1).get(),
                    "file content",
                    JgitPath.of(path2).get(),
                    "file content",
                    JgitPath.of(path3).get(),
                    "file content"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .forUser(user.email())
            .get();

    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(path1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasEmptyOldPath();
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedNewPath(path2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasEmptyOldPath();

    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1, path2).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathsForDeletedFiles() throws Exception {
    setAsCodeOwners("/foo/", user);

    String path1 = "/foo/bar/baz.md";
    String path2 = "/foo/baz/bar.md";
    String path3 = "/bar/foo.md";

    createChange(
            "Change Adding Files",
            ImmutableMap.of(
                JgitPath.of(path1).get(),
                "file content 1",
                JgitPath.of(path2).get(),
                "file content 2",
                JgitPath.of(path3).get(),
                "file content 3"))
        .getChangeId();

    PushOneCommit push =
        pushFactory.create(
            admin.newIdent(),
            testRepo,
            "Change Deleting Files",
            ImmutableMap.of(
                JgitPath.of(path1).get(),
                "file content 1",
                JgitPath.of(path2).get(),
                "file content 2",
                JgitPath.of(path3).get(),
                "file content 3"));
    Result r = push.rm("refs/for/master");
    r.assertOkStatus();
    String changeId = r.getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .forUser(user.email())
            .get();

    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasEmptyNewPath();
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedOldPath(path1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasEmptyNewPath();
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedOldPath(path2);

    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1, path2).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathsForRenamedFiles() throws Exception {
    setAsCodeOwners("/foo/", user);

    // Rename 1: user owns old and new path
    String newPath1 = "/foo/test1.md";
    String oldPath1 = "/foo/bar/test1.md";

    // Rename 2: user owns only new path
    String newPath2 = "/foo/test2.md";
    String oldPath2 = "/other/test2.md";

    // Rename 3: user owns only old path
    String newPath3 = "/other/test3.md";
    String oldPath3 = "/foo/test3.md";

    // Rename 4: user owns neither old nor new path
    String newPath4 = "/other/test4.md";
    String oldPath4 = "/other/foo/test4.md";

    String changeId1 =
        createChange(
                "Change Adding Files",
                ImmutableMap.of(
                    JgitPath.of(oldPath1).get(),
                    "file content 1",
                    JgitPath.of(oldPath2).get(),
                    "file content 2",
                    JgitPath.of(oldPath3).get(),
                    "file content 3",
                    JgitPath.of(oldPath4).get(),
                    "file content 4"))
            .getChangeId();

    // The PushOneCommit test API doesn't support renaming files in a change. Use the change edit
    // Java API instead.
    ChangeInput changeInput = new ChangeInput();
    changeInput.project = project.get();
    changeInput.branch = "master";
    changeInput.subject = "Change Renaming Files";
    changeInput.baseChange = changeId1;
    String changeId2 = gApi.changes().create(changeInput).get().changeId;
    gApi.changes().id(changeId2).edit().create();
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath1).get(), JgitPath.of(newPath1).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath2).get(), JgitPath.of(newPath2).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath3).get(), JgitPath.of(newPath3).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath4).get(), JgitPath.of(newPath4).get());
    gApi.changes().id(changeId2).edit().publish(new PublishChangeEditInput());

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId2)
            .current()
            .getOwnedPaths()
            .forUser(user.email())
            .get();

    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(3);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(newPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedOldPath(oldPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedNewPath(newPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasNonOwnedOldPath(oldPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(2)).hasNonOwnedNewPath(newPath3);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(2)).hasOwnedOldPath(oldPath3);

    List<String> ownedPaths = Arrays.asList(newPath1, oldPath1, newPath2, oldPath3);
    Collections.sort(ownedPaths);
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactlyElementsIn(ownedPaths).inOrder();

    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathForOwnUser() throws Exception {
    setAsRootCodeOwners(admin);

    String path1 = "/foo/bar/baz.md";
    String path2 = "/foo/baz/bar.md";

    String changeId =
        createChange(
                "test change",
                ImmutableMap.of(
                    JgitPath.of(path1).get(),
                    "file content",
                    JgitPath.of(path2).get(),
                    "file content"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory.change(changeId).current().getOwnedPaths().forUser("self").get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1, path2).inOrder();
  }

  @Test
  public void getOwnedPathsForNonCodeOwner() throws Exception {
    setAsCodeOwners("/foo/", admin);

    String path1 = "/foo/bar/baz.md";
    String path2 = "/foo/baz/bar.md";
    String path3 = "/bar/foo.md";

    String changeId =
        createChange(
                "test change",
                ImmutableMap.of(
                    JgitPath.of(path1).get(),
                    "file content",
                    JgitPath.of(path2).get(),
                    "file content",
                    JgitPath.of(path3).get(),
                    "file content"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().isEmpty();
  }

  @Test
  public void getOwnedPathsWithStart() throws Exception {
    setAsRootCodeOwners(user);

    String path1 = "/bar/baz.md";
    String path2 = "/bar/foo.md";
    String path3 = "/foo/bar/baz.md";
    String path4 = "/foo/baz/bar.md";

    String changeId =
        createChange(
                "test change",
                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"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(0)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo)
        .hasOwnedPathsThat()
        .containsExactly(path1, path2, path3, path4)
        .inOrder();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(1)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path2, path3, path4).inOrder();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(2)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path3, path4).inOrder();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(3)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path4);

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(4)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().isEmpty();
  }

  @Test
  public void getOwnedPathsWithLimit() throws Exception {
    setAsRootCodeOwners(user);

    String path1 = "/bar/baz.md";
    String path2 = "/bar/foo.md";
    String path3 = "/foo/bar/baz.md";
    String path4 = "/foo/baz/bar.md";

    String changeId =
        createChange(
                "test change",
                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"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withLimit(1)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1);
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withLimit(2)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1, path2).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withLimit(3)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path1, path2, path3).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withLimit(4)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo)
        .hasOwnedPathsThat()
        .containsExactly(path1, path2, path3, path4)
        .inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathsWithStartAndLimit() throws Exception {
    setAsRootCodeOwners(user);

    String path1 = "/bar/baz.md";
    String path2 = "/bar/foo.md";
    String path3 = "/foo/bar/baz.md";
    String path4 = "/foo/baz/bar.md";

    String changeId =
        createChange(
                "test change",
                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"))
            .getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .withStart(1)
            .withLimit(2)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactly(path2, path3).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();
  }

  @Test
  public void getOwnedPathsForRenamedFilesWithLimit() throws Exception {
    setAsCodeOwners("/foo/", user);

    // Rename 1: user owns old and new path
    String newPath1 = "/foo/test1.md";
    String oldPath1 = "/foo/bar/test1.md";

    // Rename 2: user owns only new path
    String newPath2 = "/foo/test2.md";
    String oldPath2 = "/other/test2.md";

    // Rename 3: user owns only old path
    String newPath3 = "/other/test3.md";
    String oldPath3 = "/foo/test3.md";

    // Rename 4: user owns neither old nor new path
    String newPath4 = "/other/test4.md";
    String oldPath4 = "/other/foo/test4.md";

    String changeId1 =
        createChange(
                "Change Adding Files",
                ImmutableMap.of(
                    JgitPath.of(oldPath1).get(),
                    "file content 1",
                    JgitPath.of(oldPath2).get(),
                    "file content 2",
                    JgitPath.of(oldPath3).get(),
                    "file content 3",
                    JgitPath.of(oldPath4).get(),
                    "file content 4"))
            .getChangeId();

    // The PushOneCommit test API doesn't support renaming files in a change. Use the change edit
    // Java API instead.
    ChangeInput changeInput = new ChangeInput();
    changeInput.project = project.get();
    changeInput.branch = "master";
    changeInput.subject = "Change Renaming Files";
    changeInput.baseChange = changeId1;
    String changeId2 = gApi.changes().create(changeInput).get().changeId;
    gApi.changes().id(changeId2).edit().create();
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath1).get(), JgitPath.of(newPath1).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath2).get(), JgitPath.of(newPath2).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath3).get(), JgitPath.of(newPath3).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath4).get(), JgitPath.of(newPath4).get());
    gApi.changes().id(changeId2).edit().publish(new PublishChangeEditInput());

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId2)
            .current()
            .getOwnedPaths()
            .withLimit(1)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(newPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedOldPath(oldPath1);
    List<String> ownedPaths = Arrays.asList(newPath1, oldPath1);
    Collections.sort(ownedPaths);
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactlyElementsIn(ownedPaths);
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId2)
            .current()
            .getOwnedPaths()
            .withLimit(2)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(newPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedOldPath(oldPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedNewPath(newPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasNonOwnedOldPath(oldPath2);
    ownedPaths = Arrays.asList(newPath1, oldPath1, newPath2);
    Collections.sort(ownedPaths);
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactlyElementsIn(ownedPaths).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isTrue();

    ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId2)
            .current()
            .getOwnedPaths()
            .withLimit(3)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(3);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(newPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedOldPath(oldPath1);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedNewPath(newPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasNonOwnedOldPath(oldPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(2)).hasNonOwnedNewPath(newPath3);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(2)).hasOwnedOldPath(oldPath3);
    ownedPaths = Arrays.asList(newPath1, oldPath1, newPath2, oldPath3);
    Collections.sort(ownedPaths);
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactlyElementsIn(ownedPaths).inOrder();
    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathsForRenamedFilesWithStartAndLimit() throws Exception {
    setAsCodeOwners("/foo/", user);

    // Rename 1: user owns old and new path
    String newPath1 = "/foo/test1.md";
    String oldPath1 = "/foo/bar/test1.md";

    // Rename 2: user owns only new path
    String newPath2 = "/foo/test2.md";
    String oldPath2 = "/other/test2.md";

    // Rename 3: user owns only old path
    String newPath3 = "/other/test3.md";
    String oldPath3 = "/foo/test3.md";

    // Rename 4: user owns neither old nor new path
    String newPath4 = "/other/test4.md";
    String oldPath4 = "/other/foo/test4.md";

    String changeId1 =
        createChange(
                "Change Adding Files",
                ImmutableMap.of(
                    JgitPath.of(oldPath1).get(),
                    "file content 1",
                    JgitPath.of(oldPath2).get(),
                    "file content 2",
                    JgitPath.of(oldPath3).get(),
                    "file content 3",
                    JgitPath.of(oldPath4).get(),
                    "file content 4"))
            .getChangeId();

    // The PushOneCommit test API doesn't support renaming files in a change. Use the change edit
    // Java API instead.
    ChangeInput changeInput = new ChangeInput();
    changeInput.project = project.get();
    changeInput.branch = "master";
    changeInput.subject = "Change Renaming Files";
    changeInput.baseChange = changeId1;
    String changeId2 = gApi.changes().create(changeInput).get().changeId;
    gApi.changes().id(changeId2).edit().create();
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath1).get(), JgitPath.of(newPath1).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath2).get(), JgitPath.of(newPath2).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath3).get(), JgitPath.of(newPath3).get());
    gApi.changes()
        .id(changeId2)
        .edit()
        .renameFile(JgitPath.of(oldPath4).get(), JgitPath.of(newPath4).get());
    gApi.changes().id(changeId2).edit().publish(new PublishChangeEditInput());

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId2)
            .current()
            .getOwnedPaths()
            .withStart(1)
            .withLimit(2)
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedChangedFilesThat().hasSize(2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasOwnedNewPath(newPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(0)).hasNonOwnedOldPath(oldPath2);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasNonOwnedNewPath(newPath3);
    assertThat(ownedPathsInfo.ownedChangedFiles.get(1)).hasOwnedOldPath(oldPath3);
    List<String> ownedPaths = Arrays.asList(newPath2, oldPath3);
    Collections.sort(ownedPaths);
    assertThat(ownedPathsInfo).hasOwnedPathsThat().containsExactlyElementsIn(ownedPaths);
    assertThat(ownedPathsInfo).hasMoreThat().isNull();
  }

  @Test
  public void getOwnedPathsLimitedByDefault() throws Exception {
    setAsRootCodeOwners(user);

    ImmutableMap.Builder<String, String> files = ImmutableMap.builder();
    for (int i = 1; i <= GetOwnedPaths.DEFAULT_LIMIT + 1; i++) {
      files.put(String.format("foo-%d.txt", i), "file content");
    }

    String changeId = createChange("test change", files.build()).getChangeId();

    OwnedPathsInfo ownedPathsInfo =
        changeCodeOwnersApiFactory
            .change(changeId)
            .current()
            .getOwnedPaths()
            .forUser(user.email())
            .get();
    assertThat(ownedPathsInfo).hasOwnedPathsThat().hasSize(GetOwnedPaths.DEFAULT_LIMIT);
  }

  @Test
  public void startCannotBeNegative() throws Exception {
    String changeId = createChange().getChangeId();
    BadRequestException exception =
        assertThrows(
            BadRequestException.class,
            () ->
                changeCodeOwnersApiFactory
                    .change(changeId)
                    .current()
                    .getOwnedPaths()
                    .withStart(-1)
                    .forUser(user.email())
                    .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)
                    .current()
                    .getOwnedPaths()
                    .withLimit(-1)
                    .forUser(user.email())
                    .get());
    assertThat(exception).hasMessageThat().isEqualTo("limit must be positive");
  }

  @Test
  public void cannotGetOwnedPathWithoutLimit() throws Exception {
    String changeId = createChange().getChangeId();
    BadRequestException exception =
        assertThrows(
            BadRequestException.class,
            () ->
                changeCodeOwnersApiFactory
                    .change(changeId)
                    .current()
                    .getOwnedPaths()
                    .withLimit(0)
                    .forUser(user.email())
                    .get());
    assertThat(exception).hasMessageThat().isEqualTo("limit must be positive");
  }
}