def test_area(self): # a triangle has three points, and 4 color bands (RGBA) c = (0, 0, 0) t = Triangle([0, 0, 10, 0, 10, 10], c, 255) self.assertEqual(t.get_area(), 50) t = Triangle([10, 10, 0, 0, 10, 0], c, 255) self.assertEqual(t.get_area(), 50) t = Triangle([0, 0, 5, 0, 5, 10], c, 255) self.assertEqual(t.get_area(), 25)