def test_save_as_gif_converts_back_to_supported_mode(self):
output = io.BytesIO()
with open('tests/images/transparent.gif', 'rb') as f:
backend = pillow_backend.PillowBackend.from_file(f)
backend.image = backend.image.convert('RGB')
pillow_backend.save_as_gif(backend, output)
image = backend.get_pillow_image().open(output)
self.assertEqual(image.mode, 'P')
def test_save_transparent_gif(self):
with open('tests/images/transparent.gif', 'rb') as f:
backend = pillow_backend.PillowBackend.from_file(f)
# Save it into memory
f = io.BytesIO()
pillow_backend.save_as_gif(backend, f)
# Reload it
f.seek(0)
backend = pillow_backend.PillowBackend.from_file(f)
self.assertTrue(pillow_backend.has_alpha(backend))
self.assertFalse(pillow_backend.has_animation(backend))
# Check that the alpha of pixel 1,1 is 0
self.assertEqual(backend.image.convert('RGBA').getpixel((1, 1))[3], 0)
def test_save_as_gif(self):
output = io.BytesIO()
pillow_backend.save_as_gif(self.backend, output)
output.seek(0)
self.assertEqual(imghdr.what(output), 'gif')
