Question

我在一个使用子进程模块运行Photoshop脚本的类中有一个Python函数。

def runPhotoshop(self):
        photoshop = r'C:\Program Files\Adobe\Adobe Photoshop CC 2014\Photoshop.exe'
        extendscript = os.path.join(os.getcwd(), 'someScript.jsx')
        returnCode = subprocess.call([photoshop, extendscript])    
        return returnCode

每次启动单元测试时启动Photoshop都很昂贵，所以我决定使用mock。 MyTool类是先前从mytool模块导入的。

@mock.patch('mytool.subprocess')
def test_run_tool(self, mock_subprocess):
    # Need instance inside the test for patch to work
    tool = MyTool()

    # Patch in a mock subprocess module
    mock_subprocess.call.return_value = 0

    # Run the function and test the return value
    returnCode = mytool.runPhotoshop()
    self.assertEqual(returnCode, 0, "Javascript was not successful")

    # Was the subprocess function called?
    photoshop = r'C:\Program Files\Adobe\Adobe Photoshop CC 2014\Photoshop.exe'
    extendscript = os.path.join(os.getcwd(), 'someScript.jsx')
    mock_subprocess.call.assert_called_with([photoshop, extendscript])

当从命令行（Windows Powershell）运行时，此测试工作正常，而Photoshop永远不会启动，这是我想要的。

In method test_add_metadata_to_image_file
.
----------------------------------------------------------------------
Ran 1 test in 0.016s

OK

然而，当我在Eclipse Helios的PyDev插件中运行相同的单元测试时，不仅Photoshop启动，而且我得到一个断言错误：

AssertionError: Expected call: call(['C:\\Program Files\\Adobe\\Adobe Photoshop CC 2014\\Photoshop.exe', 'D:\\work_directory\\someScript.jsx'])
Not called

这不是我第一次注意到在PyDev中运行单元测试与命令行之间的区别。事实上，我正在考虑不再在PyDev中运行测试，只是坚持命令行（减少变量）。但是，我想知道发生了什么。

使用PyDev中的模拟运行单元测试与命令行的结果不同

0 个答案: