[Release] Automatically notify mailing list on a pending merge

tools/release/test_scripts.py

Index: tools/release/test_scripts.py
diff --git a/tools/release/test_scripts.py b/tools/release/test_scripts.py
index 07f5c40c3bdd61e72bd4cd92bd91b8f7373aa588..4f133ac28acba3fa5d5ed9d77a1d140f92293200 100644
--- a/tools/release/test_scripts.py
+++ b/tools/release/test_scripts.py
@@ -389,6 +389,20 @@ class ScriptTest(unittest.TestCase):
       f.write("  // Some line...\n")
       f.write("#define V8_IS_CANDIDATE_VERSION 0\n")
 
+  def WriteFakeWatchlistsFile(self):
+    watchlists_file = os.path.join(TEST_CONFIG["DEFAULT_CWD"], WATCHLISTS_FILE)
+    if not os.path.exists(os.path.dirname(watchlists_file)):
+      os.makedirs(os.path.dirname(watchlists_file))
+    with open(watchlists_file, "w") as f:
+
+      content = """
+    'merges': [
+      # Only enabled on branches created with tools/release/create_release.py
+      # 'v8-merges@googlegroups.com',
+    ],
+"""
+      f.write(content)
+
   def MakeStep(self):
     """Convenience wrapper."""
     options = ScriptsBase(TEST_CONFIG, self, self._state).MakeOptions([])
@@ -952,6 +966,8 @@ Performance and stability improvements on all platforms."""
       Cmd("git checkout -f 3.22.4 -- ChangeLog", "", cb=ResetChangeLog),
       Cmd("git checkout -f 3.22.4 -- include/v8-version.h", "",
           cb=self.WriteFakeVersionFile),
+      Cmd("git checkout -f 3.22.4 -- WATCHLISTS", "",
+          cb=self.WriteFakeWatchlistsFile),
       Cmd("git commit -aF \"%s\"" % TEST_CONFIG["COMMITMSG_FILE"], "",
           cb=CheckVersionCommit),
       Cmd("git push origin "
@@ -983,6 +999,18 @@ Performance and stability improvements on all platforms."""
     # Note: The version file is on build number 5 again in the end of this test
     # since the git command that merges to master is mocked out.
 
+    # Check for correct content of the WATCHLISTS file
+
+    watchlists_content = FileToText(os.path.join(TEST_CONFIG["DEFAULT_CWD"],
+                                          WATCHLISTS_FILE))
+    expected_watchlists_content = """
+    'merges': [
+      # Only enabled on branches created with tools/release/create_release.py
+      'v8-merges@googlegroups.com',
+    ],
+"""
+    self.assertEqual(watchlists_content, expected_watchlists_content)
+
   C_V8_22624_LOG = """V8 CL.
 
 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22624 123