Question

我正在使用pytest模块进行测试

问题：运行pytest时，它工作正常，但是如何阻止它在我正在测试的函数中调用函数

例如

def download_csv(self):
    # code here will download csv

    # I want to test code up until here and dont run the decompress_csv() function
    self.decompress_csv()


# assume this function is in a separate test file
def test_download_csv():
    assert download_csv() == # i will check if it downloaded

Answer 1

您将“模拟”该函数以返回一个值，该值允许测试被测系统中的其余逻辑（在本例中为HomePageModule方法）。

假设我们有一个requirements.txt，

download_csv

使用这样的文件pytest mock，我们可以模拟test.py函数。

decompress_csv

请注意，在正常情况下，您的测试代码可能位于与所测试代码不同的文件中；这就是为什么我指出import mock def decompress_csv(): raise Exception("This will never be called by the test below") def download_csv(): decompressed = decompress_csv() return f"{decompressed} downloaded and processed" def test_download_csv(): # These additional variables are just to underscore what's going on: module_that_contains_function_to_be_mocked = 'test' mock_target = f"{module_that_contains_function_to_be_mocked}.decompress_csv" with mock.patch(mock_target, return_value='fake decompressed output'): assert download_csv() == "fake decompressed output downloaded and processed"至关重要。

如何测试在其中调用另一个函数的一个函数

1 个答案: