message_test.py 文件源码

def testExtendStringWithNothing(self, message_module):
    """Test no-ops extending repeated string fields."""
    m = message_module.TestAllTypes()
    self.assertSequenceEqual([], m.repeated_string)

    # TODO(ptucker): Deprecate this behavior. b/18413862
    for falsy_value in MessageTest.FALSY_VALUES:
      m.repeated_string.extend(falsy_value)
      self.assertSequenceEqual([], m.repeated_string)

    m.repeated_string.extend([])
    self.assertSequenceEqual([], m.repeated_string)