为 py.test 夹具函数提供默认参数值 [英] Provide default argument value for py.test fixture function

问题描述

是否有更好的方法为参数 pytest.fixture 函数提供默认值?

Is there a better way for me to provide default value for argument pytest.fixture function?

我有几个测试用例需要在测试用例之前运行 fixture_func ，如果没有提供它们，我想在 fixture 中使用默认值作为参数.我能想出的唯一代码如下.我有什么更好的方法吗?

I have a couple of testcases that requires to run fixture_func before testcase and I would like to use default value for argument in fixture if none of them is provided. The only code I can come up with is as follows. Any better way for me to do it?

@pytest.fixture(scope="function")
def fixture_func(self, request):
    argA = request.param['argA'] if request.param.get('argA', None) else 'default value for argA'
    argB = request.param['argB'] if request.param.get('argB', None) else 'default value for argB'
    # do something with fixture

@pytest.mark.parametrize('fixture_func', [dict(argA='argA')], indirect=['fixture_func'])
def test_case_1(self, fixture_func):
    #do something under testcase
    pass

@pytest.mark.parametrize('fixture_func', [dict()], indirect=['fixture_func'])
def test_case_2(self, fixture_func):
    #do something under testcase
    pass

我想用作

def test_case_3(self, fixture_func):
    #do something under testcase
    pass

推荐答案

None 是默认结果

request.param.get('argA', None) 

所以，你可以:

argA = request.param.get('argA', 'default value for argA')

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