How to retrieve the markers for py.test in conftest.py?

Question

I am running tests with py.test and want to access the markers I have set on the command line. I have tried the following code inside conftest.py (based on the documentation I found here) in a fixture that is used by every running test (i.e. a fixture that setup the test):

@pytest.fixture
def basedriver(request):
    ...
    node = request.node
    print("Marker: %s" % str(node.get_marker('set1')))
    ...

but when I invoke the test like follows:

py.test -s -m "set1 or ready"

I get the following output

Marker: None

I seem to do it wrong. How to do it right?

Ideally, I can retrieve the whole string, i.e. "set1 or ready"...

Answer 1

request.node is the test function object, so request.node.get_closest_marker('set1') returns the marker attached to the test currently being executed, or None if a marker with the name cannot be found. For example, running a test

@pytest.fixture
def basedriver(request):
    node = request.node
    print('Marker:', node.get_closest_marker('set1'))

@pytest.mark.set1
def test_spam(basedriver):
    assert True

def test_eggs(basedriver):
    assert True

will print

test_spam.py::test_spam Marker: MarkInfo(_marks=[Mark(name='set1', args=(), kwargs={})])
PASSED
test_spam.py::test_eggs Marker: None
PASSED

What you want is the passed value of the command line argument -m. Access it via config fixture:

@pytest.fixture
def basedriver(pytestconfig):
    markers_arg = pytestconfig.getoption('-m')
    print('markers passed from command line:', markers_arg)
    ...