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import pytest


def pytest_addoption(parser):
    parser.addoption(
        "--device-address",
        action="store",
        default=None,
        dest="adapter",
        help=(
            "Pass an adapter string for connection to an instrument needed for a test, e.g. "
            "--device-address ASRL1::INSTR or --device-address TCPIP::192.168.0.123::INSTR"
        ),
    )


@pytest.fixture(scope="session")
def connected_device_address(pytestconfig):
    """
    Fixture to pass the address to a device for tests that require a connection to an instrument.

    Using this fixture in a test function will skip it when running pytest by default. The test will
    only run if a device address is provided with the --device-address option when invoking pytest.
    To run only relevant tests, use the -k option to select the desired tests.
    """
    address = pytestconfig.getoption("--device-address", skip=True)
    return address