def test_gamma():
"""Test setting gamma."""
np.random.seed(0)
data = np.random.random((10, 15))
layer = Image(data)
assert layer.gamma == 1
# Change gamma property
gamma = 0.7
layer.gamma = gamma
assert layer.gamma == gamma
# Set gamma as keyword argument
layer = Image(data, gamma=gamma)
assert layer.gamma == gamma
