def test_opacity_min_boundry(self):
"""Ensure opacity is not set below minimum allowable level."""
a = Actor('alien')
a.opacity = -0.1
self.assertEqual(a.opacity, 0.0)
def test_opacity_max_boundry(self):
"""Ensure opacity is not set above maximum allowable level."""
a = Actor('alien')
a.opacity = 1.1
self.assertEqual(a.opacity, 1.0)
def test_opacity_value(self):
"""Ensure opacity gives the value it was set to."""
a = Actor('alien')
expected_opacity = 0.54321
a.opacity = expected_opacity
self.assertEqual(a.opacity, expected_opacity)
