Python自动单元测试实例

Python unittest模块的相关用法

 

待测源码类：widget.py

#!/usr/bin/env python class Widget: def __init__(self, size = (40, 40)): self._size = size def getSize(self): return self._size def resize(self, width, height): if width == 0 or height < 0: raise ValueError, "illegal size" self._size = (width, height) def dispose(self): pass

测试代码类：widget_unittest.py

#!/usr/bin/env python import sys import unittest from widget import Widget class WidgetTestCase(unittest.TestCase): def setUp(self): self.widget = Widget() def tearDown(self): self.widget = None def testSize(self): self.assertEqual(self.widget.getSize(), (40, 40)) def testReSize(self): self.widget.resize(20,30) self.assertEqual(self.widget.getSize(), (20, 30)) def suite(): suite = unittest.TestSuite() suite.addTest(WidgetTestCase("testSize")) suite.addTest(WidgetTestCase("testReSize")) return suite if __name__ == "__main__": unittest.TextTestRunner().run(suite()) # If you use IDE to execute test script in an external console, # uncomment following code line. # while True # if raw_input("Type y or Y to close!") in ("y","Y"): sys.exit(0)

运行结果：python widget_unittest.py

[[email protected] test]$ python widget_unittest.py
..
----------------------------------------------------------------------
Ran 2 tests in 0.000s

OK

 

动态方法不再覆盖runTest()方法，而是为测试类编写多个测试方法（按习惯这些方法通常以test开头），在创建TestCase子类的实例时必须给出测试方法的名称，来为PyUnit测试框架指明运行该测试用例时究竟应该调用测试类中的哪个方法.

如果用于测试的类中所有的测试方法都以test开，Python程序员甚至可以用PyUnit模块提供的makeSuite()方法来构造一个TestSuite：

def suite():
    return unittest.makeSuite(WidgetTestCase, "test")