def test_thumbnail_noop(self):
"""
Test that no image operations occur if the desired w/h match image's
existing w/h
"""
renderer = LazyThumbRenderer()
mock_img = MockImg()
mock_img.size = (100, 100)
img = renderer.thumbnail(width=100, img=mock_img)
self.assertEqual(img.size[0], 100)
self.assertEqual(img.size[1], 100)
self.assertEqual(len(mock_img.called), 0)
def test_thumbnail_square(self):
"""
Test behavior of thumbnail action when no width == height
"""
renderer = LazyThumbRenderer()
mock_img = MockImg()
mock_img.size = (100, 100)
img = renderer.thumbnail(width=50, img=mock_img)
self.assertEqual(img.size[0], 50)
self.assertEqual(img.size[1], 50)
self.assertEqual(len(mock_img.called), 1)
self.assertTrue('resize' in mock_img.called)
def test_thumbnail_no_upscaling(self):
"""
Ensure that upscaling is forbidden in thumbnail action.
"""
renderer = LazyThumbRenderer()
mock_img = MockImg()
mock_img.size = (100, 100)
img = renderer.thumbnail(width=20000, img=mock_img)
self.assertEqual(img.size[0], 100)
self.assertEqual(img.size[1], 100)
self.assertEqual(len(mock_img.called), 0)
