如何对单元测试单元进行测试 [英] How to unittest unittest TestCases
问题描述
我有一个unittest.TestCase子级,它定义了几个特定于域的断言检查. 我想运行一些单元测试来对该功能进行单元测试,以控制一切都在以后的更新中起作用.
I have a unittest.TestCase child, which defines several domain specific assert Checks. I would like to run some unittests to unittest this functionality to control that everything work on future updates.
class MyBaseTestCase(unittest.TestCase):
def setUp(self):
...
def tearDown(self):
...
def run(self, result):
...
def assertSpec(self, condition, message):
...
我想在其他单元测试中实例化MyBaseTestCase,如下所示:
I want to instantiate MyBaseTestCase in other unit test, like this:
class TestBase(unittest.TestCase):
def test_assertSpec(self):
self.testclass = MyBaseTestCase()
self.assertRaises(AssertionError, self.testclass.assertSpec, False)
在执行此操作时,我遇到了多个不同的错误,所以我的问题是单元测试自定义unittest函数的常见做法是什么?
I'm encountering multiple different errors, when doing this, so my question is what is a common practice for unittesting custom unittest functions?
以防万一:
$ jython
>>> import sys
>>> sys.version
'2.5.2 (Release_2_5_2:7206, Mar 2 2011, 23:12:06) \n[Java HotSpot(TM) Server VM (Sun Microsystems Inc.)]'
推荐答案
不确定是否有Jython特有的方法可以解决这个问题,但是我会做这样的事情:
Not sure if there's anything Jython specific that would break this, but I would do something like this:
import StringIO
import unittest
# The TestCase subclass to test
class MyBaseTestCase(unittest.TestCase):
def assertSpec(self, thing):
assert thing == 123
# The testcase for MyBaseTestCase
class TestMyTest(unittest.TestCase):
def test_assetSpec(self):
"""Ensure assertSpec works
"""
class _TestSpec(MyBaseTestCase):
def test_failure_case(self):
self.assertSpec(121)
def test_success_case(self):
self.assertSpec(123)
# Load tests from _TestSpec
loader = unittest.TestLoader()
suite = loader.loadTestsFromTestCase(_TestSpec)
# Create runner, and run _TestSpec
io = StringIO.StringIO()
runner = unittest.TextTestRunner(stream = io)
results = runner.run(suite)
# Should be one failed test, and one passed test
self.assertEquals(results.testsRun, 2)
self.assertEquals(len(results.failures), 1)
if __name__ == "__main__":
unittest.main()
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