python unittest：不能调用修饰测试 [英] python unittest: can't call decorated test

问题描述

我有一个相当大的测试套件，并且装饰了一些test_ *函数。现在我无法通过来调用它们。/test.pyMySqlTestCase.test_foo_double ，python3.2抱怨： ValueError：<中没有这样的测试方法; class'__main __。MySqlTestCase'> ;:结果。我的装饰代码如下：

I have a pretty large test suite and I decorated some of the test_* functions. Now I can't call them by ./test.py MySqlTestCase.test_foo_double, python3.2 complains that: ValueError: no such test method in <class '__main__.MySqlTestCase'>: result. My decorator code looks like this:

def procedure_test(procedure_name, arguments_count, returns):

    '''Decorator for procedure tests, that simplifies testing whether procedure
    with given name is available, whether it has given number of arguments
    and returns given value.'''

    def decorator(test):
        def result(self):
            procedure = self.db.procedures[self.case(procedure_name)]
            self.assertEqual(len(procedure.arguments), arguments_count)
            self.assertEqual(procedure.returns, 
                             None if returns is None else self.case(returns))
            test(self, procedure)
        return result
    return decorator

和测试方法：

@procedure_test('foo_double', 0, 'integer')
def test_foo_double(self, procedure):
    self.assertEqual(procedure.database, self.db)
    self.assertEqual(procedure.sql, 'RETURN 2 * value')
    self.assertArguments(procedure, [('value', 'int4')])

推荐答案

我认为问题在于修饰的函数名称不同，同样，它也不满足被视为测试方法的模式。

I think the problem is that the decorated function doesn't have the same name and, also, it doesn't satisfy the pattern to be considered a test method.

使用 functools.wrap 进行装饰装饰器应该可以解决您的问题。详细信息此处。

Using functools.wrap to decorate decorator should fix your problem. More information here.

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