def test_write_pixel_to_canvas(self):
c = Canvas(10, 20)
red = Color(1, 0, 0)
c.write_pixel(2, 3, red)
assert c.pixel_at(2, 3) == red
def test_write_pixel_to_canvas(self):
canvas = Canvas(10, 20)
red = Color(1, 0, 0)
canvas.write_pixel(2, 3, red)
self.assertTrue(canvas.pixel_at(2, 3) == red)