Question

pytest允许您在某些条件下（即：在平台上）跳过测试：

@pytest.mark.skipif(sys.platform == "win32")
def test_foo(fixture):
    assert bar(fixture)

是否可以创建标记以在特定条件下使测试失败？

@pytest.mark.failif(sys.platform == "win32")
def test_foo(fixture):
    assert bar(fixture)

Answer 1

即使没有pytest，您也可以编写一个简单的装饰器来做到这一点：

cap = cv2.VideoCapture(0)

prev_move = None

while True:
    ret, frame = cap.read()
    if not ret:
        continue

    # rectangle for user to play
    cv2.rectangle(frame, (100, 100), (500, 500), (255, 255, 255), 2)
    # rectangle for computer to play
    cv2.rectangle(frame, (800, 100), (1200, 500), (255, 255, 255), 2)

    # extract the region of image within the user rectangle
    roi = frame[100:500, 100:500]
    img = cv2.cvtColor(roi, cv2.COLOR_BGR2RGB)
    img = cv2.resize(img, (227, 227))

    # predict the move made
    pred = model.predict(np.array([img]))
    move_code = np.argmax(pred[0])
    user_move_name = mapper(move_code)

    # predict the winner (human vs computer)
    if prev_move != user_move_name:
        if user_move_name != "none":
            computer_move_name = choice(['rock', 'paper', 'scissors'])
            winner = calculate_winner(user_move_name, computer_move_name)
        else:
            computer_move_name = "none"
            winner = "Waiting..."
    prev_move = user_move_name

    # display the information
    font = cv2.FONT_HERSHEY_SIMPLEX
    cv2.putText(frame, "Your Move: " + user_move_name,
                (50, 50), font, 1.2, (255, 255, 255), 2, cv2.LINE_AA)
    cv2.putText(frame, "Computer's Move: " + computer_move_name,
                (750, 50), font, 1.2, (255, 255, 255), 2, cv2.LINE_AA)
    cv2.putText(frame, "Winner: " + winner,
                (400, 600), font, 2, (0, 0, 255), 4, cv2.LINE_AA)

    if computer_move_name != "none":
        icon = cv2.imread(
            "{}.png".format(computer_move_name))
        icon = cv2.resize(icon, (400, 400))
        frame[100:500, 800:1200] = icon

    cv2.imshow("Rock Paper Scissors", frame)

    k = cv2.waitKey(10)
    if k == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

用法是

def failif(condition: bool, *, reason: str) -> Callable[[T], T]:
    def failif_decorator(func: T) -> T:
        @functools.wraps(func)
        def failif_decorator_inner(*args: Any, **kwargs: Any) -> Any:
            assert not condition, reason
            return func(*args, **kwargs)
        return cast(T, failif_decorator_inner)
    return failif_decorator

对于特定于pytest的解决方案，您可以使用hooks for registering marks之一-尽管要花很多时间

我可以创建一个“ pytest.mark.failif”吗？

1 个答案: