Revert of Refactor source_control.py and add a test.

tools/auto_bisect/source_control_test.py

-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Unit tests for the source_control module."""
-
-import unittest
-import mock
-
-import source_control
-
-
-class SourceControlTest(unittest.TestCase):
-
-  @mock.patch('source_control.bisect_utils.CheckRunGit')
-  def testQueryRevisionInfo(self, mock_run_git):
-    # The QueryRevisionInfo function should run a sequence of git commands,
-    # then returns a dict with the results.
-    command_output_map = [
-        (['log', '--format=%aN', '-1', 'abcd1234'], 'Some Name\n'),
-        (['log', '--format=%aE', '-1', 'abcd1234'], 'somename@x.com'),
-        (['log', '--format=%s', '-1', 'abcd1234'], 'Commit subject '),
-        (['log', '--format=%cD', '-1', 'abcd1234'], 'Fri, 10 Oct 2014'),
-        (['log', '--format=%b', '-1', 'abcd1234'], 'Commit body\n'),
-    ]
-    _SetMockCheckRunGitBehavior(mock_run_git, command_output_map)
-    # The result of calling QueryRevisionInfo is a dictionary like that below.
-    # Trailing whitespace is stripped.
-    expected = {
-        'author': 'Some Name',
-        'email': 'somename@x.com',
-        'date': 'Fri, 10 Oct 2014',
-        'subject': 'Commit subject',
-        'body': 'Commit body',
-    }
-    self.assertEqual(expected, source_control.QueryRevisionInfo('abcd1234'))
-    self.assertEqual(5, mock_run_git.call_count)
-
-  def testResolveToRevision_InputGitHash(self):
-    # The ResolveToRevision function returns a git commit hash corresponding
-    # to the input, so if the input can't be parsed as an int, it is returned.
-    self.assertEqual(
-        'abcd1234',
-        source_control.ResolveToRevision('abcd1234', 'chromium', {}, 5))
-
-    # Note: It actually does this for any junk that isn't an int. This isn't
-    # necessarily desired behavior.
-    self.assertEqual(
-        'foo bar',
-        source_control.ResolveToRevision('foo bar', 'chromium', {}, 5))
-
-  @mock.patch('source_control.bisect_utils.CheckRunGit')
-  def testResolveToRevision_NotFound(self, mock_run_git):
-    # If no corresponding git hash was found, then None is returned.
-    mock_run_git.return_value = ''
-    self.assertIsNone(
-        source_control.ResolveToRevision('12345', 'chromium', {}, 5))
-
-  @mock.patch('source_control.bisect_utils.CheckRunGit')
-  def testResolveToRevision_Found(self, mock_run_git):
-    # In general, ResolveToRevision finds a git commit hash by repeatedly
-    # calling "git log --grep ..." with different numbers until something
-    # matches.
-    mock_run_git.return_value = 'abcd1234'
-    self.assertEqual(
-        'abcd1234',
-        source_control.ResolveToRevision('12345', 'chromium', {}, 5))
-    self.assertEqual(1, mock_run_git.call_count)
-
-
-def _SetMockCheckRunGitBehavior(mock_obj, command_output_map):
-  """Sets the behavior of a mock function according to the given mapping."""
-  # Unused argument 'cwd', expected in args list but not needed.
-  # pylint: disable=W0613
-  def FakeCheckRunGit(in_command, cwd=None):
-    for command, output in command_output_map:
-      if command == in_command:
-        return output
-  mock_obj.side_effect = FakeCheckRunGit
-
-
-if __name__ == '__main__':
-  unittest.main()
-