def test_framerate_range(camera, previewing):
save_framerate = camera.framerate
try:
tol = Fraction(1, 256)
camera.framerate_range = (Fraction(1, 6), 1)
assert camera.framerate == 0
assert isclose(camera.framerate_range.low, Fraction(1, 6), rel_tol=tol)
assert isclose(camera.framerate_range.high, 1, rel_tol=tol)
camera.framerate_range = (Fraction(50, 1000), Fraction(166, 1000))
assert camera.framerate == 0
assert isclose(camera.framerate_range.low, Fraction(50, 1000), rel_tol=tol)
assert isclose(camera.framerate_range.high, Fraction(166, 1000), rel_tol=tol)
camera.framerate_range = (1, 5)
assert camera.framerate == 0
assert camera.framerate_range == (1, 5)
camera.framerate_range = (1, 30.0)
assert camera.framerate == 0
assert camera.framerate_range == (1, 30)
with pytest.raises(picamera.PiCameraError):
camera.framerate_delta = 1
with pytest.raises(picamera.PiCameraError):
camera.framerate_range = (1, 200)
with pytest.raises(picamera.PiCameraError):
camera.framerate_range = (0, 30)
with pytest.raises(picamera.PiCameraError):
camera.framerate_range = (2, 1)
finally:
camera.framerate = save_framerate
def test_framerate_delta(camera, previewing):
for num in range(-10, 11):
camera.framerate_delta = num / 10
assert isclose(camera.framerate_delta, Fraction(num, 10), rel_tol=Fraction(1, 256))