def test_random_brightness_scale_outside_range_positive():
img = np.ones((1, 1, 3)) * 1024
zeros = np.zeros((1, 1, 3))
must_be_1024 = affine_transformations.random_brightness(img, [1, 1], False)
assert np.array_equal(img, must_be_1024)
must_be_0 = affine_transformations.random_brightness(img, [1, 1], True)
assert np.array_equal(zeros, must_be_0)
def test_random_brightness_scale():
img = np.ones((1, 1, 3)) * 128
zeros = np.zeros((1, 1, 3))
must_be_128 = affine_transformations.random_brightness(img, [1, 1], False)
assert np.array_equal(img, must_be_128)
must_be_0 = affine_transformations.random_brightness(img, [1, 1], True)
assert np.array_equal(zeros, must_be_0)
def test_random_brightness_error():
with pytest.raises(ValueError):
affine_transformations.random_brightness(0, [0])
def test_random_brightness(monkeypatch):
monkeypatch.setattr(affine_transformations, 'apply_brightness_shift',
lambda x, y: (x, y))
assert (0, 3.) == affine_transformations.random_brightness(0, (3, 3))