Function test_syspath_prepend

testing/test_monkeypatch.py:246–255

(mp: MonkeyPatch)

def test_syspath_prepend(mp: MonkeyPatch) -> None:
    old = list(sys.path)
    mp.syspath_prepend("world")
    mp.syspath_prepend("hello")
    assert sys.path[0] == "hello"
    assert sys.path[1] == "world"
    mp.undo()
    assert sys.path == old
    mp.undo()
    assert sys.path == old


def test_syspath_prepend_double_undo(mp: MonkeyPatch) -> None: