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Python中unittest模块做UT(单元测试)使用实例

Jun 06, 2016 am 11:18 AM
python

待测试的类(Widget.py)

# Widget.py 
# Python 2.7.6 
 
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' 
    else: 
      self.size = (width,height) 
      return self.size 
  def dispose(self): 
    pass 
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测试类(Auto.py)

# coding=utf8 
# Auto.dy 
# Python 2.7.6 
 
from Widget import Widget #导入测试类模块Widget 
import unittest      #导入unittest模块  
 
 
class WidgetTestCase(unittest.TestCase): 
#让所有执行测试的类都继承于TestCase类,可以将TestCase看成是对特定类进行测试的方法的集合 
 
  #在setUp()方法中进行测试前的初始化工作。 
  def setUp(self):   
    self.widget = Widget() 
 
  #并在tearDown()方法中执行测试后的清除工作,setUp()和tearDown()都是TestCase类中定义的方法。 
  def tearDown(self): 
    self.widget = None 
 
  #测试Widget类中getSize方法 
  def testgetSize(self): 
    print "Test GetSize" 
    #对Widget类中getSize()方法的返回值和预期值进行比较,确保两者是相等的, 
    #assertEqual()也是TestCase类中定义的方法。 
    self.assertEqual(self.widget.getSize(), (40, 40)) 
     
  #测试Widget类中reSize方法 
  def testreSize(self): 
    print "Test Resize" 
    #对Widget类中reSize()方法的返回值和预期值进行比较,确保两者是相等的。 
    #assertEqual()也是TestCase类中定义的方法。 
    self.assertEqual(self.widget.reSize(50,100),(50,100)) 
   
 
#提供名为suite()的全局方法,PyUnit在执行测试的过程调用suit()方法来确定有多少个测试用例需要被执行, 
#可以将TestSuite看成是包含所有测试用例的一个容器。 
def suite(): 
  suite = unittest.TestSuite() 
  suite.addTest(WidgetTestCase("testgetSize"))#往此添加需要测试的方法testgetSize() 
  suite.addTest(WidgetTestCase("testreSize")) #往此添加需要测试的方法testreSize() 
  return suite  
 
if __name__ == "__main__": 
  unittest.main(defaultTest = 'suite') #在主函数中调用全局方法. 
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测试结果:

D:\Python>python27 Auto.py 
Test GetSize 
.Test Resize 
. 
------------------------------ 
Ran 2 tests in 0.004s 
 
OK 
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总结:
1。第一步:先写好测试类
2。第二步:导入unittest模块及测试的类,运用setup()方法做测试前的准备工作,如建立数据库连接,运用teardown()方法做测试后的清除工作,如取消数据库的链接,再对类中的方法逐一做测试。
3。第三步: 写suite()的全局方法,将要测试的方法,一一加入。
测试结果,有几个测试用例就有几个. 最后显示OK,表示通过。

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