def testJobUpdate(self):
        jobDir = os.path.join(os.getcwd(), "testJobDir")
        os.mkdir(jobDir) #If directory already exists then the test will fail
        command = "by your command"
        memory = 2^32
        cpu = 1
        tryCount = 100
        
        for i in xrange(40):
            startTime = time.time()
            j = Job(command, memory, cpu, tryCount, jobDir)
            childNumber = random.choice(range(20))
            for k in xrange(childNumber):
                j.children.append((command, memory, cpu))
            self.assertEquals(len(j.children), childNumber)
            j.update(tryCount=tryCount, depth=0)
            j = Job.read(j.getJobFileName())
            self.assertEquals(len(j.children) + len(j.followOnCommands), childNumber + 1)
            for childJobFile, memory, cpu in j.children:
                cJ = Job.read(childJobFile)
                self.assertEquals(cJ.remainingRetryCount, tryCount)
                #self.assertEquals(cJ.jobDir, os.path.split(cJ)[0])
                self.assertEquals(cJ.children, [])
                self.assertEquals(cJ.followOnCommands, [ (command, memory, cpu, 0)])
                self.assertEquals(cJ.messages, [])
                self.assertTrue(os.path.exists(cJ.getJobFileName()))
                cJ.delete()
                self.assertTrue(not os.path.exists(cJ.getJobFileName()))
            self.assertEquals(os.listdir(jobDir), [ "job" ])
            j.delete()
            print "It took %f seconds to update jobs" % (time.time() - startTime) #We've just used it for benchmarking, so far 
            
        system("rm -rf %s" % jobDir)
dataset/ETHPy150Open benedictpaten/jobTree/test/jobTest.py/TestCase.testJobUpdate/original