1 files changed, 47 insertions, 0 deletions
diff --git a/tests/test_hooks.py b/tests/test_hooks.py
index 9d52d1849..14c226c75 100644
--- a/tests/test_hooks.py
+++ b/tests/test_hooks.py
@@ -14,6 +14,9 @@
 
 """Unittests for the hooks.py module."""
 
+from io import StringIO
+import sys
+
 import pytest
 
 import hooks
@@ -58,3 +61,47 @@ def test_direct_interp(shebang: str, interp: str) -> None:
 def test_env_interp(shebang: str, interp: str) -> None:
     """Lines whose shebang launches through `env`."""
     assert hooks.RepoHook._ExtractInterpFromShebang(shebang) == interp
+
+
+def test_post_sync_argument_validation() -> None:
+    """Test that post-sync hook requires exact API arguments."""
+
+    class FakeProject:
+
+        def __init__(self):
+            self.worktree = "/some/path"
+            self.enabled_repo_hooks = ["post-sync"]
+
+    hook = hooks.RepoHook(
+        hook_type="post-sync",
+        hooks_project=FakeProject(),
+        repo_topdir="/topdir",
+        manifest_url="https://gerrit",
+        allow_all_hooks=True,
+    )
+
+    old_stderr = sys.stderr
+    sys.stderr = StringIO()
+
+    try:
+        # Call with missing arg `sync_duration_seconds`
+        res = hook.Run(repo_topdir="/topdir")
+        assert res is False
+        assert "hook 'post-sync' called incorrectly" in sys.stderr.getvalue()
+
+        # Mock _CheckHook and _ExecuteHook to test success path
+        hook._CheckHook = lambda: None
+
+        executed_kwargs = {}
+
+        def fake_execute(**kw):
+            executed_kwargs.update(kw)
+
+        hook._ExecuteHook = fake_execute
+
+        res = hook.Run(repo_topdir="/topdir", sync_duration_seconds=12.345)
+        assert res is True
+        assert executed_kwargs.get("sync_duration_seconds") == 12.345
+
+    finally:
+        sys.stderr = old_stderr