def test_registered_extensions_uninitialized(self):
# Arrange
Image._initialized = 0
extension = Image.EXTENSION
Image.EXTENSION = {}
# Act
Image.registered_extensions()
# Assert
self.assertEqual(Image._initialized, 2)
# Restore the original state and assert
Image.EXTENSION = extension
self.assertTrue(Image.EXTENSION)
def test_registered_extensions(self):
# Arrange
# Open an image to trigger plugin registration
Image.open('Tests/images/rgb.jpg')
# Act
extensions = Image.registered_extensions()
# Assert
self.assertTrue(extensions)
for ext in ['.cur', '.icns', '.tif', '.tiff']:
self.assertIn(ext, extensions)
