transform_test.py 文件源码

def test_set_smoothscale_backend(self):
        # All machines should allow 'GENERIC'.
        original_type = pygame.transform.get_smoothscale_backend()
        pygame.transform.set_smoothscale_backend('GENERIC')
        filter_type = pygame.transform.get_smoothscale_backend()
        self.failUnlessEqual(filter_type, 'GENERIC')
        # All machines should allow returning to original value.
        # Also check that keyword argument works.
        pygame.transform.set_smoothscale_backend(type=original_type)
        # Something invalid.
        def change():
            pygame.transform.set_smoothscale_backend('mmx')
        self.failUnlessRaises(ValueError, change)
        # Invalid argument keyword.
        def change():
            pygame.transform.set_smoothscale_backend(t='GENERIC')
        self.failUnlessRaises(TypeError, change)
        # Invalid argument type.
        def change():
            pygame.transform.set_smoothscale_backend(1)
        self.failUnlessRaises(TypeError, change)
        # Unsupported type, if possible.
        if original_type != 'SSE':
            def change():
                pygame.transform.set_smoothscale_backend('SSE')
            self.failUnlessRaises(ValueError, change)
        # Should be back where we started.
        filter_type = pygame.transform.get_smoothscale_backend()
        self.failUnlessEqual(filter_type, original_type)