Introduce tests for ReplicationTaskId thread-local

Ensure that the ReplicationTaskId introduced in Iacacda97 preserves
nesting of task-ids with or without exceptions.

Also assures that the withTaskId() is used in conjunction with refs
filtering.

Change-Id: Id2af833f94b68bde20124cca695524a254b44790

src/test/java/com/googlesource/gerrit/plugins/replication/pull/FetchOneTest.java

diff --git a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/FetchOneTest.java b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/FetchOneTest.java
index 50d91ff..5547b60 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/FetchOneTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/FetchOneTest.java
@@ -369,6 +369,25 @@
   }
 
   @Test
+  public void shouldSetReplicationTaskIdDuringRefsFiltering() throws Exception {
+    assertThat(ReplicationTaskId.get()).isNull();
+
+    setupObjectUnderTestMocksForFetchingTestRef();
+
+    objectUnderTest.setReplicationFetchFilter(replicationFilter);
+    when(replicationFilter.get())
+        .thenReturn(
+            (projectName, fetchRefs) -> {
+              assertThat(ReplicationTaskId.get()).isEqualTo(objectUnderTest.getTaskIdHex());
+              return Set.of(TEST_REF);
+            });
+
+    objectUnderTest.run();
+
+    assertThat(ReplicationTaskId.get()).isNull();
+  }
+
+  @Test
   public void fetchWithoutDelta_shouldPassNewRefsToFilter() throws Exception {
     setupMocks(true);
     String REMOTE_REF = "refs/heads/remote";
@@ -890,6 +909,15 @@
     assertThat(refsToDelete(fetchRefSpecs)).isEqualTo(Set.of("refs/something/someref"));
   }
 
+  private void setupObjectUnderTestMocksForFetchingTestRef() throws Exception {
+    setupMocks(true);
+    Set<FetchRefSpec> refSpecs = Set.of(TEST_REF_SPEC);
+    setupFetchFactoryMock(
+        List.of(new FetchFactoryEntry.Builder().refSpecNameWithDefaults(TEST_REF).build()),
+        Optional.of(List.of(TEST_REF)));
+    objectUnderTest.addRefs(refSpecs);
+  }
+
   private void setupRequestScopeMock() {
     when(scoper.scope(any()))
         .thenAnswer(

src/test/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskIdTest.java

diff --git a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskIdTest.java b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskIdTest.java
new file mode 100644
index 0000000..4889d2a
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskIdTest.java
@@ -0,0 +1,69 @@
+// Copyright (C) 2026 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.googlesource.gerrit.plugins.replication.pull;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
+import static com.googlesource.gerrit.plugins.replication.pull.ReplicationTaskId.withTaskId;
+
+import java.io.IOException;
+import org.junit.Test;
+
+public class ReplicationTaskIdTest {
+  String OUTER_TASK_ID = "outer";
+  String INNER_TASK_ID = "inner";
+
+  @Test
+  public void withTaskIdShouldPreserveIdUponNestedCalls() throws IOException {
+    String unused =
+        withTaskId(
+            OUTER_TASK_ID,
+            () -> {
+              withTaskId(
+                  INNER_TASK_ID,
+                  () -> {
+                    assertThat(ReplicationTaskId.get()).isEqualTo(INNER_TASK_ID);
+                    return "unused";
+                  });
+              assertThat(ReplicationTaskId.get()).isEqualTo(OUTER_TASK_ID);
+              return "unused";
+            });
+    assertThat(ReplicationTaskId.get()).isNull();
+  }
+
+  @Test
+  public void withTaskIdShouldPreserveIdUponNestedCallsWithExceptions() throws IOException {
+    assertThrows(
+        IOException.class,
+        () ->
+            withTaskId(
+                OUTER_TASK_ID,
+                () -> {
+                  try {
+                    withTaskId(
+                        INNER_TASK_ID,
+                        () -> {
+                          assertThat(ReplicationTaskId.get()).isEqualTo(INNER_TASK_ID);
+                          throw new IOException("exception");
+                        });
+                  } catch (IOException e) {
+                    assertThat(ReplicationTaskId.get()).isEqualTo(OUTER_TASK_ID);
+                    throw e;
+                  }
+                  return "unused";
+                }));
+    assertThat(ReplicationTaskId.get()).isNull();
+  }
+}