模拟 python 个库或包装器方法

Question

在我的代码 release_bundler.py 文件中

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

如果我想测试 filter_changeset_paths 方法，我必须在 build_bundler_copy_paths 方法中模拟两个 getcwd 方法，或者只模拟后者？

我尝试在我的测试中模拟该方法 release_bundler_test.py，导入 classed 是这样的：

from release_bundler import NestedModulePathsFilterStrategy, MavenDependenciesPathsBuilderStrategy

然后修补 MavenDependenciesPathsBuilderStrategy class

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')

但我认为这个模拟不起作用，因为 self.assertIsNotNone(result) 失败了

所以问题是：

我嘲讽的方式正确吗？无法理解它
会模拟 MavenDependenciesPathsBuilderStrategy 方法吗，或者我还必须在它的方法中模拟 os.getcwd 吗？

Answer 1

我的坏蛋，我的新手 python 大脑花了一些时间才弄明白事情的窍门：

这就是它运作良好的方式

  @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()

我可能是错的，但我认为我们不能将多个装饰器应用于一个方法？

模拟 python 个库或包装器方法

mocking python libraries or wrapper method

python

unit-testing

mocking

python-mock