'Cache deletion is transparently ignored on the dummy cache backend'

def test_delete(self):

    cache.set('key1', 'spam')
    cache.set('key2', 'eggs')
    self.assertIsNone(cache.get('key1'))
    cache.delete('key1')
    self.assertIsNone(cache.get('key1'))
    self.assertIsNone(cache.get('key2'))
