def _():
assert Camera.cameras == set()
a = Camera(1)
assert Camera.cameras == {a}
Camera(1)
assert Camera.cameras == {a}
Camera(1, 1)
assert Camera.cameras == {a}
c = Camera(2)
assert Camera.cameras == {a, c}
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert a._video_capture.isOpened()
with a:
assert a._video_capture.isOpened()
assert not a._video_capture.isOpened()
assert not a._video_capture.isOpened()
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert a.resolution == (640, 480)
a.downscale(2)
assert a.resolution == (320, 240)
a.downscale(2)
assert a.resolution == (160, 120)
a.downscale(2)
assert a.resolution == (160, 120)
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert a.width == 640
def _():
assert Camera(0).id == 0
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert type(a._video_capture) is VideoCapture and a._video_capture.isOpened()
def _():
a = Camera(GOOD_CAMERA_INDEX)
with a as b:
assert a is b
def _():
with raises(ConnectionError):
with Camera(BAD_CAMERA_INDEX):
...
def _():
a = Camera(0)
assert a._id == 0 and a._code is None and a._video_capture is None
a = Camera(1, COLOR_RGB2LUV)
assert a._id == 1 and a._code == COLOR_RGB2LUV and a._video_capture is None
def _():
with Camera(GOOD_CAMERA_INDEX, COLOR_RGB2GRAY) as a:
assert type(a.img) == ndarray and a.img.shape == (480, 640)
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert type(a.img) == ndarray and a.img.shape == (480, 640, 4)
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert a.resolution == (640, 480)
def _():
with Camera(GOOD_CAMERA_INDEX) as a:
assert a.height == 480