Using setUp defined variables in parametrized.expand

Question

Suppose that I have the following unit test class:

class Test(unittest.TestCase)
    def setUp(self) -> None:
        self.test_parameter1 = 'A'
        self.test_parameter2 = 'B'
    
    @parametrized.expand([('A',), ('B',)])
    def test_function1(self, test_param):
        * Do tests here *

Is there a way how can I use self.test_parameter1 and self.test_parameter2 in parameterized.expand instead of the literals A and B? Imagine A and B are large dicts, the tests would be very messy in this case if two large dicts are given to parametrized_expand.

Answer 1

Note that I've used the spelling "parameterized" rather than "parametrized" throughout my answer.

You could pass them as strings to @parameterized.expand and then eval them in the function:

class Test(unittest.TestCase)
def setUp(self) -> None:
    self.test_parameter1 = 'A'
    self.test_parameter2 = 'B'

@parameterized.expand([('self.test_parameter1',), ('self.test_parameter2',)])
def test_function1(self, test_param):
    test_param = eval(test_param)
    # * Do tests here *

Presumably you're in control of the entire test file, so eval shouldn't raise the security concerns that it would if it were called on unknown code.