unittest+coverage怎么进行单元测试覆盖

#coding=utf8 
import os 
import time 
 
def findTestWithPath(): 
 current_dir=os.getcwd() 
 folderName=os.listdir(current_dir) 
 #print folderName 
 #获取到测试文件所在目录 
 TestSuit=[suite for suite in folderName if not suite.find("TestSuit")] 
 #用来保存测试文件 
 testfile=[] 
 withPathFile=[] 
 for suite in TestSuit: 
 #获取测试目录下的所有测试文件 
 testfile=testfile+os.listdir(".\\"+suite) 
 for withPath in testfile: 
 withPath=current_dir+"\\"+suite+"\\"+withPath 
 withPathFile.append(withPath) 
 del testfile 
 #把testfile中的py文件挑选出来 
 withPathFile=[name for name in withPathFile if not "pyc" in name] 
 #print testfile 
 print withPathFile 
 return withPathFile 
 
def codeCoverage(): 
 now = time.strftime("%Y%m%d%H%M") 
 htmlReport=os.getcwd()+"\\"+"CoverageReport" 
 htmlCmd="coverage html -d " + htmlReport +"\\"+now 
 for pyfile in findTestWithPath(): 
 runPyCmd="coverage run " + pyfile 
 if os.path.exists(htmlReport) : 
 os.system(runPyCmd) 
 os.system(htmlCmd) 
 else: 
 os.mkdir(htmlReport) 
 os.system(runPyCmd) 
 os.system(htmlCmd) 
 
 
if name=="main": 
 codeCoverage()