Question

这是我的代码，我编写了一个decorater，它会引发一个RuntimeError，在testcase中，我使用assertRaises来确保引发了异常。但是当我运行程序时，程序仍然会被异常中断。我认为它应该告诉我测试用例通过了！

import unittest
import decorators

def not_completed(func):
  """
  Prevent user from calling not fully implemented functions.
  """
  raise RuntimeError("This function is not fully implemented: {}".format(func.__name__))


@not_completed
def test_not_completed(a, b):
  print("invoke test", a+b)


class TestDecorators(unittest.TestCase):
  def test_not_completed(self):
    with self.assertRaises(RuntimeError):
      decorators.test_not_completed(1, 3)

这是结果输出：

 File "E:\nutstore\Temp\hhw_dev_tools\decorators.py", line 8, in <module>
    @not_completed
  File "E:\nutstore\Temp\hhw_dev_tools\decorators.py", line 5, in not_completed
    raise RuntimeError("This function is not fully implemented: {}".format(func.__name__))
RuntimeError: This function is not fully implemented: test_not_completed

Answer 1

因为not_completed在导入时间内运行

@not_completed
def test_not_completed(a, b):
  print("invoke test", a+b)

是

def test_not_completed(a, b):
  print("invoke test", a+b)
test_not_completed = not_completed(test_not_completed)

因此not_completed没有在资源管理器中运行

unittest assertRaise仍然引发异常

1 个答案: