其他实例.ppt

使用pexpect实现命令行自动化测试 徐荣中 2015-03-06 Email：xurongzhong#126.com 个人博客：/blog 微博：/cizhenshi 一览社群：679983 qq群：241450660 实地交流地址：/group_article/5191422951800241.htm 一、分享内容概述 介绍 安装 快速入门 EOF和TIMEOUT 类介绍 实例 Pexpect介绍 Pexpect allows easy control of interactive console applications. Pexpect is a pure Python module for spawning child applications; controlling them; and responding to expected patterns in their output. Pexpect works like Don Libes’ Expect. Pexpect allows your script to spawn a child application and control it as if a human were typing commands. Pexpect can be used for automating interactive applications such as ssh, ftp, passwd, telnet, etc. It can be used to a automate setup scripts for duplicating software package installations on different servers. It can be used for automated software testing. It should work on any platform that supports the standard Python pty module. The Pexpect interface was designed to be easy to use. 参考资料： /pypi/pexpect Pexpect安装 pip install pexpect 或 easy_install pexpect 要求： This version of Pexpect(3.3) requires Python 2.6 or 3.2 or above. Pexpect only works on POSIX systems, where the pty module is present in the standard library. It may be possible to run it on Windows using Cygwin. 参考资料： /en/latest/install.html Pexpect快速入门 import pexpect child = pexpect.spawn(ftp ) child.expect(Name .*: ) child.sendline(anonymous) child.expect(Password:) child.sendline() child.expect(ftp ) child.sendline(lcd /tmp) child.expect(ftp ) child.sendline(cd pub/OpenBSD) child.expect(ftp ) child.sendline(get README) child.expect(ftp ) child.sendline(bye) 两个重要方法： expect() and send() (or sendline() ) 信息输出： before 包含预期字符串之前的信息， after包含匹配模式。 参考资料： /en/latest/overview.html 常量EOF和TIMEOUT End Of File (EOF)：子进程退出时会生成EOF异常。相关信息存储在before中。 child.expect(password:) child.sendline(my_secret_password) # We expect any of these three patterns... i = child.expect ([Permission denied, Terminal type, [#\$] ]) if i==0: print(Permission denied on host. Cant