import unittest

import pygame

from display import Display

class TestDisplay(unittest.TestCase):
    def test_can_create(self):
        d = Display()
        self.assertNotEqual(d, None)

    def test_can_update(self):
        d = Display()
        surf = pygame.Surface((300,300))
        sprite = pygame.sprite.Sprite()
        sprite.image = surf
        sprite.rect = pygame.Rect((0,0),(300,300))
        group = pygame.sprite.Group()
        group.add(sprite)
        d.update([group])