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()