def test_current_frame_does_not_block(self):
c = Camera(4)
start = perf_counter()
c.current_frame()
c.current_frame()
end = perf_counter()
self.assertTrue(end - start < 0.01)
def test_current_frame_opencv(self):
c = Camera(4)
frame = c.current_frame(format="OpenCV")
self.assertIsInstance(frame, Mock)