??????????????????????????????python???????????????????????unittest?? testtools?? subunit?? coverage?? testrepository?? nose?? mox?? mock?? fixtures?? discover???????setuptools?? distutils?????Щ?????????д??????????????????е????????N????????????????????????????????????????????????????????????????????????д?ù?????????д?ò?????????????????????????????????????????????????????????????????????????????????????Щ??????????????????????д???·????????????
????????????unittest????????python?е??????飬????????????????????ο??????????????????http://docs.python.org/2.7/library/unittest.html?????????????д???????????????????????????????Щ??????????????????????????Щ???????????unittest??????????????????????????????
????unittest?????python?汾??junit??junit??java?е????????????java?????????????仰?????У?Keep the bar green?????????eclipseд??java????????????????unittest???????junit?е???????????????????test case?? test suite????????????????????????ò???????????????
???????????????????unittest?е?4??????????test fixture?? test case?? test suite?? test runner????????????????????????????????????????????????????????Χ???????????????????????
?????????????unittest???????????????????????????????????????????????????????侲???????￡?

???????TestCase????????????????????????????????????????????????????????????????????????(setUp)????в??????(run)????????????????(tearDown)???????(unit test)????????????????????????????????????????????????????????????????????????????????
????????????????????????????TestSuite??????TestSuite????????TestSuite??
????TestLoader??????????TestCase??TestSuite?е???????м???loadTestsFrom__()??????????????????TestCase???????????????????add??TestSuite?У?????????TestSuite?????
????TextTestRunner??????в?????????????е?run(test)?????TestSuite/TestCase?е?run(result)??????
??????????????浽TextTestResult????У??????????????????????????????????????????????
?????????????????????????????д??TestCase???????TestLoader????TestCase??TestSuite???????TextTestRunner??????TestSuite?????е?????????TextTestResult?У??????????????unittest.main????С?
????????????漰????test case?? test suite?? test runner?????????????????test fixture?????????????test fixture???????TestCase??docstring??????????λ???
????Test authors should subclass TestCase for their own tests. Construction and deconstruction of the test's environment ('fixture') can be implemented by overriding the 'setUp' and 'tearDown' methods respectively.
?????????????????????????????????????????fixture?????????TestCase??setUp()??tearDown()???????????????????????????????????????????????????????????????setUp()?н????????????????????Щ?????????tearDown()?????????????в???????????????????????tearDown?????????????????TestCase?????????????????????fixture????????????????????fixtures??????????????????????
???????????????????????????????????????????????????￡???unittest????????????

????TestSequenceFunctions?????unittest.TestCase????д??setUp()?????????????????????'test'???????????????TestSequenceFunctions?????????????????????????????????????????????????????????????????????????????TestCase?????????????????????????????????test_*()????????????????????????????????????????ЩTestLoader????μ????????????????????????loader.TestLoader?????????loadTestsFromTestCase()??????