test_target.py 文件源码

def test_getitem(target):
    class AProtocol(abc.ABC):
        pass

    class A(Driver, AProtocol):
        pass

    class B(Driver):
        pass

    a = A(target, "adriver")
    target.activate(a)
    assert isinstance(target[A], A)
    assert target[A] is a
    assert target[AProtocol] is a
    assert target[A, "adriver"] is a
    assert target[AProtocol, "adriver"] is a
    with pytest.raises(NoDriverFoundError) as excinfo:
        target[A, "bdriver"]
    assert "have other names" in excinfo.value.msg
    with pytest.raises(NoDriverFoundError) as excinfo:
        target[B, "adriver"]
    assert "no active driver" in excinfo.value.msg

    a2 = A(target, None)
    target.activate(a2)
    with pytest.raises(NoDriverFoundError) as excinfo:
        target[A]
    assert "multiple active drivers" in excinfo.value.msg