模擬python庫或包裝器方法

Question

在我的代碼中release_bundler.py文件

class MavenDependenciesPathsBuilderStrategy(PathsBuilderStrategy):

  def build_bundler_copy_paths(self, mapping_values):
    source = join(getcwd(),'target','dependency',mapping_values[0])
    destination = join(getcwd(),'target','generated-resources',mapping_values[1],mapping_values[0])
    return [source, destination]

class NestedModulePathsFilterStrategy(FilterStrategy):

  def filter_changeset_paths(self, changeset_paths, bundling_map, paths_builder_strategy):
    for mapping_key in bundling_map.keys():
      if(mapping_key in changeset_paths):
        mapping_values = bundling_map.get(mapping_key).values()
        copy_paths = paths_builder_strategy.build_bundler_copy_paths(mapping_values)
        return copy_paths

如果我想測試filter_changeset_paths方法，我將不得不在build_bundler_copy_paths方法內部模擬兩個getcwd方法，或者僅模擬后者使用嗎？

我嘗試在測試版本release_bundler_test.py該方法，導入如下所示的類：

from release_bundler import NestedModulePathsFilterStrategy, MavenDependenciesPathsBuilderStrategy

然后修補MavenDependenciesPathsBuilderStrategy類

def mock_build_bundler_copy_paths(self, mapping_values):
  return ['/cwd/foo','/cwd/bar']

@mock.patch('release_bundler.MavenDependenciesPathsBuilderStrategy', 'build_bundler_copy_paths', mock_build_bundler_copy_paths)
  def test_nested_module_filter_changeset_paths(self):
    pc_maps = {'ProcessingComponents/ProcessContainer':['ProcessContainerInstaller-bin.zip','SERVICES/Installer'],'ProcessingComponents/DataGrid':['ProcessContainerInstaller-bin.zip','SERVICES/Installer']}
    changed_paths =  ['ProcessingComponents/ProcessContainer/ProcessContainerRuntime/main/java/com/suntecgroup/tbms/container/ContainerException.java']
    filter_test = NestedModulePathsFilterStrategy()
    result = filter_test.filter_changeset_paths(changed_paths,pc_maps, MavenDependenciesPathsBuilderStrategy())
    self.assertIsNotNone(result)
    self.assertEquals(result[0], '/cwd/foo')
    self.assertEquals(result[0], '/cwd/bar')

但我認為此模擬無效，因為self.assertIsNotNone(result)失敗

所以問題是：

1. 我在嘲笑正確的方法嗎？ 無法阻止我
2. 會在MavenDependenciesPathsBuilderStrategy方法上進行模擬嗎，還是我也必須在方法內部模擬os.getcwd ？

Answer 1

我的壞人，我的新手python大腦花了一段時間才掌握了很多東西：

這是如何運作良好

  @mock.patch('release_bundler.MavenDependenciesPathsBuilderStrategy.build_bundler_copy_paths')
  def test_filters_pc_from_changeset_paths(self, mock_build_bundler_copy_paths):
    pc_maps = {'ProcessingComponents/ProcessContainer':['ProcessContainerInstaller-bin.zip','SERVICES/Installer']}
    changed_paths =  ['ProcessingComponents/ProcessContainer/ProcessContainerRuntime/main/java/com/suntecgroup/tbms/container/ContainerException.java']
    with mock.patch('release_bundler.NestedModulePathsFilterStrategy.do_copy') as mock_do_copy: 
      mock_do_copy.return_value = ''
      filter_test = NestedModulePathsFilterStrategy()
      filter_test.filter_changeset_paths(changed_paths,pc_maps, MavenDependenciesPathsBuilderStrategy())
      mock_build_bundler_copy_paths.assert_called_with(['ProcessContainerInstaller-bin.zip','SERVICES/Installer'])
      mock_do_copy.assert_called()

我可能是錯的，但我認為我們不能將多個裝飾器應用於一個方法？