[Release] Distinguish between merges and follow-up CLs

tools/release/test_mergeinfo.py

Index: tools/release/test_mergeinfo.py
diff --git a/tools/release/test_mergeinfo.py b/tools/release/test_mergeinfo.py
new file mode 100755
index 0000000000000000000000000000000000000000..04c32fc754b4e493abc891e8c748b1dd506f1256
--- /dev/null
+++ b/tools/release/test_mergeinfo.py
@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# Copyright 2015 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from collections import namedtuple
+from os import path

[Michael Achenbach, 2015/09/17 14:19:00]

nit: order

[Michael Hablich, 2015/09/18 07:38:47]

Acknowledged.

+import mergeinfo
+import shutil
+from subprocess import Popen, PIPE, check_call
+import unittest
+
+
+TEST_CONFIG = {
+  "GIT_REPO": "/tmp/test-v8-search-related-commits",
+}
+
+class TestSearchRelatedCommits(unittest.TestCase):
+
+  base_dir = TEST_CONFIG["GIT_REPO"]
+
+  def _execute_git(self, git_args):
+
+    fullCommand = ["git", "-C", self.base_dir] + git_args
+    p = Popen(args=fullCommand, stdin=PIPE,
+        stdout=PIPE, stderr=PIPE)
+    output, err = p.communicate()
+    rc = p.returncode
+    if rc != 0:
+      raise Exception(err)
+    return output
+
+  def setUp(self):
+    if path.exists(self.base_dir):
+      shutil.rmtree(self.base_dir)
+
+    check_call(["git", "init", self.base_dir])
+
+    # Initial commit
+    message = """[turbofan] Sanitize language mode for javascript operators.
+
+    R=mstarzinger@chromium.org
+
+    Review URL: https://codereview.chromium.org/1084243005
+
+    Cr-Commit-Position: refs/heads/master@{#28059}"""
+    self._make_empty_commit(message)
+
+    message = """[crankshaft] Do some stuff
+
+    R=hablich@chromium.org
+
+    Review URL: https://codereview.chromium.org/1084243007
+
+    Cr-Commit-Position: refs/heads/master@{#28030}"""
+
+    self._make_empty_commit(message)
+
+  def tearDown(self):
+    if path.exists(self.base_dir):
+      shutil.rmtree(self.base_dir)
+
+  def _assert_correct_standard_result(
+      self, result, all_commits, hash_of_first_commit):
+    self.assertEqual(len(result), 1, "Master commit not found")
+    self.assertTrue(
+        result.get(hash_of_first_commit),
+        "Master commit is wrong")
+
+    self.assertEqual(
+        len(result[hash_of_first_commit]),
+        1,
+        "Child commit not found")
+    self.assertEqual(
+        all_commits[2],
+        result[hash_of_first_commit][0],
+        "Child commit wrong")
+
+  def _get_commits(self):
+    commits = self._execute_git(

[Michael Achenbach, 2015/09/17 14:19:00]

nit: remove local var?

[Michael Hablich, 2015/09/18 07:38:47]

I think it is easier to debug that way.

+        ["log", "--format=%H", "--reverse"]).splitlines()
+    return commits
+
+  def _make_empty_commit(self, message):
+    self._execute_git(["commit", "--allow-empty", "-m", message])
+
+  def testLonelyCommit(self):
+    message = '''Initial commit'''
+    self._make_empty_commit(message)
+    commits = self._get_commits()
+    hash_of_first_commit = commits[0]
+
+    result = mergeinfo.describe_commit(
+        self.base_dir,
+        hash_of_first_commit,
+        False)
+
+    self.assertEqual(
+        result,
+        hash_of_first_commit)
+
+  def testSearchFollowUpCommits(self):
+    message = 'Initial commit'
+    self._make_empty_commit(message)
+    commits = self._get_commits()
+    hash_of_first_commit = commits[0]
+
+    message = 'Follow-up commit of '  + hash_of_first_commit
+    self._make_empty_commit(message)
+    self._make_empty_commit(message)
+    self._make_empty_commit(message)
+    message = 'Not related commit'
+    self._make_empty_commit(message)
+
+    commits = self._get_commits()
+
+    followups = mergeinfo.get_followup_commits(
+        self.base_dir,
+        hash_of_first_commit,
+        False)

[Michael Achenbach, 2015/09/17 14:19:00]

Shoudn't this assert something?"

[Michael Hablich, 2015/09/18 07:38:47]

Right. Currently I am in the process of writing the tests. 

+
+
+if __name__ == "__main__":
+  #import sys;sys.argv = ['', 'Test.testName']
+   unittest.main()