Passing pytest function arguments to a fixture

Question

I am trying to create a fixure that simply prints the arguments of a pytest test case.

For example:

@pytest.fixture(scope='function')
def print_test_function_arguments(request):
    # Get the value of argument_1 from the run of the test function
    print(f'argument_1 = {value_1}')
    

def test_something(print_test_function_arguments, argument_1, argument_2):    
    assert False

Answer 1

If you want to do any kind of introspection, request fixture is the way to go. request.node gives you the current test item, request.node.function the test_something function object and request.getfixturevalue("spam") will evaluate the fixture spam and return its result (or take it from fixture cache if already evaluated before). A simple args introspection example (untested):

import inspect
import pytest


@pytest.fixture(scope='function')
def print_test_function_arguments(request):
    argspec = inspect.getfullargspec(request.node.function)
    positional_args = argspec.args
    positional_args.remove("print_test_function_arguments")
    for argname in positional_args:
        print(argname, "=", request.getfixturevalue(argname))

Of course, you can't evaluate the fixture print_test_function_arguments in its body, otherwise it will stuck in an infinite recursion, so its name must be removed from arguments list first.