如何单元测试unittest TestCases

Question

我有一个单元测试。子TestCase，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单元测试这个功能，以控制一切工作在未来的更新。

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，像这样:

class TestBase(unittest.TestCase):
    def test_assertSpec(self):
        self.testclass = MyBaseTestCase()
        self.assertRaises(AssertionError, self.testclass.assertSpec, False)

我遇到了多个不同的错误，当这样做的时候，所以我的问题是什么是单元测试自定义单元测试函数的常见做法?

如果有帮助的话:

$ 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.)]'

Answer 1

不确定是否有任何特定于Jython的东西会打破这一点，但我会这样做:

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()