test_hashlib.py 文件源码

def check_update(self, name, data, digest):
        constructors = self.constructors_to_test[name]
        # 2 is for hashlib.name(...) and hashlib.new(name, ...)
        self.assertGreaterEqual(len(constructors), 2)
        for hash_object_constructor in constructors:
            h = hash_object_constructor()
            h.update(data)
            computed = h.hexdigest()
            self.assertEqual(
                    computed, digest,
                    "Hash algorithm %s using %s when updated returned hexdigest"
                    " %r for %d byte input data that should have hashed to %r."
                    % (name, hash_object_constructor,
                       computed, len(data), digest))