def test_compare_colors(self):
ip = Image_operations()
color0 = (255, 255, 0)
res = ip.compare_colors(color0, color0)
self.assertTrue(res == 0)
color0 = (255, 255, 0)
color1 = (255, 254, 0)
res = ip.compare_colors(color0, color1)
self.assertTrue(res < 2)
color0 = (230, 230, 10)
color1 = (255, 255, 0)
res = ip.compare_colors(color0, color1)
self.assertTrue(5 < res < 20)
color0 = (255, 0, 0)
color1 = (255, 255, 0)
res = ip.compare_colors(color0, color1)
self.assertTrue(res > 20)
