python.py 文件源码

def yield_fixture(scope="function", params=None, autouse=False, ids=None):
    """ (return a) decorator to mark a yield-fixture factory function
    (EXPERIMENTAL).

    This takes the same arguments as :py:func:`pytest.fixture` but
    expects a fixture function to use a ``yield`` instead of a ``return``
    statement to provide a fixture.  See
    http://pytest.org/en/latest/yieldfixture.html for more info.
    """
    if callable(scope) and params is None and autouse == False:
        # direct decoration
        return FixtureFunctionMarker(
                "function", params, autouse, yieldctx=True)(scope)
    else:
        return FixtureFunctionMarker(scope, params, autouse,
                                     yieldctx=True, ids=ids)