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import unittest
import pygame
import pygame.image
from pgzero.screen import Screen
from pgzero.loaders import set_root, images
pygame.init()
surf = pygame.display.set_mode((200, 100))
class ScreenTest(unittest.TestCase):
@classmethod
def setUpClass(self):
set_root(__file__)
def setUp(self):
surf.fill((0, 0, 0))
self.screen = Screen(surf)
def assertImagesEqual(self, a, b):
adata, bdata = (pygame.image.tostring(i, 'RGB') for i in (a, b))
if adata != bdata:
raise AssertionError("Images differ")
def test_blit_surf(self):
"""We can blit a surface to the screen."""
self.screen.blit(images.alien, (0, 0))
self.assertImagesEqual(surf, images.expected_alien_blit)
def test_blit_name(self):
"""screen.blit() accepts an image name instead of a Surface."""
self.screen.blit('alien', (0, 0))
self.assertImagesEqual(surf, images.expected_alien_blit)
if __name__ == '__main__':
unittest.main()
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