How to pass arguments in pytest by command line

python pytest
ashish sarkar picture ashish sarkar · Nov 30, 2016 · Viewed 56.6k times · Source

I have a code and I need to pass the arguments like name from terminal. Here is my code and how to pass the arguments. I am getting a "File not found" kind error that I don't understand.

I have tried the command in the terminal: pytest <filename>.py -almonds I should get the name printed as "almonds" 

@pytest.mark.parametrize("name")
def print_name(name):
    print ("Displaying name: %s" % name)

Answer

clay picture clay · Feb 9, 2017

In your pytest test, don't use @pytest.mark.parametrize:

def test_print_name(name):
    print ("Displaying name: %s" % name)

In conftest.py:

def pytest_addoption(parser):
    parser.addoption("--name", action="store", default="default name")


def pytest_generate_tests(metafunc):
    # This is called for every test. Only get/set command line arguments
    # if the argument is specified in the list of test "fixturenames".
    option_value = metafunc.config.option.name
    if 'name' in metafunc.fixturenames and option_value is not None:
        metafunc.parametrize("name", [option_value])

Then you can run from the command line with a command line argument:

pytest -s tests/my_test_module.py --name abc

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