SomeGuyOnAComputer SomeGuyOnAComputer - 6 months ago 64
Python Question

Override a pytest parameterized functions name

My parameters determine the name of my parameterized pytest. I will be using a some randomized params for these tests. In order for my reporting names in junit to not get messed up, I'd like to create a static name for each parameterized test.

Is it possible?

JUnit seems to have a parameter: Changing names of parameterized tests

class TestMe:
@pytest.mark.parametrize(
("testname", "op", "value"),
[
("testA", "plus", "3"),
("testB", "minus", "1"),
]
)
def test_ops(self, testname, op, value):


I tried overwriting
request.node.name
however I can only rename it during test execution.

I'm almost positive I either need to write a plugin or a fixture. What do you think would be the best way to go about this?

Answer

You're looking for the ids argument of pytest.mark.parametrize:

list of string ids, or a callable. If strings, each is corresponding to the argvalues so that they are part of the test id. If callable, it should take one argument (a single argvalue) and return a string or return None.

Your code would look like

@pytest.mark.parametrize(
    ("testname", "op", "value"),
    [
        ("testA", "plus", "3"),
        ("testB", "minus", "1"),
    ],
    ids=['testA id', 'testB id']
)
def test_industry(self, testname, op, value):
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