'Test that wildcards are retained as literals
See: http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Invalidation.html#invalidation-specifying-objects-paths'

def test_wildcard_escape(self):

    batch = cf.invalidation.InvalidationBatch()
    self.assertEqual(batch.escape('/*'), '/*')
    self.assertEqual(batch.escape('/foo*'), '/foo*')
    self.assertEqual(batch.escape('/foo/bar/*'), '/foo/bar/*')
    self.assertEqual(batch.escape('/nowildcard'), '/nowildcard')
    self.assertEqual(batch.escape('/other    special    characters'), '/other%20special%20characters')
