tests/git_find_releases_test.py

#!/usr/bin/env vpython3
# coding=utf-8
# Copyright 2020 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 git_find_releases.py."""

from __future__ import print_function
from __future__ import unicode_literals

import logging
import os
import sys
import unittest

if sys.version_info.major == 2:
  from StringIO import StringIO
  import mock
else:
  from io import StringIO
  from unittest import mock

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

import git_find_releases
import git_common


class TestGitFindReleases(unittest.TestCase):
  @mock.patch('sys.stdout', StringIO())
  @mock.patch('git_common.run', return_value='')
  def test_invalid_commit(self, git_run):
    result = git_find_releases.main(['foo'])
    self.assertEqual(1, result)
    self.assertEqual('foo not found', sys.stdout.getvalue().strip())
    git_run.assert_called_once_with('name-rev', '--tags', '--name-only', 'foo')

  @mock.patch('sys.stdout', StringIO())
  @mock.patch('git_common.run')
  def test_no_merge(self, git_run):
    def git_run_function(*args):
      assert len(args) > 1
      if args[0] == 'name-rev' and args[1] == '--tags':
        return 'undefined'
      elif args[0] == 'name-rev' and args[1] == '--refs':
        return '1.0.0'
      elif args[0] == 'log':
        return ''
      assert False, "Unexpected arguments for git.run"

    git_run.side_effect = git_run_function
    result = git_find_releases.main(['foo'])
    self.assertEqual(0, result)
    stdout = sys.stdout.getvalue().strip()
    self.assertIn('commit foo was', stdout)
    self.assertIn('No merges found', stdout)
    self.assertEqual(3, git_run.call_count)


if __name__ == '__main__':
  logging.basicConfig(
      level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
  unittest.main()