如何在自动化测试中初始化会话数据? (python 2.7,webpy,nosetests)

时间:2014-12-03 15:32:24

标签: python web.py nosetests

我有一个Web应用程序,它使用会话数据来确定下一步该做什么。 应用程序在浏览器中运行并执行它应该执行的操作。 我想写一个自动化测试,以便为将来的项目提供这些知识。 我在测试中初始化(和移交)会话数据的最后几个小时是痛苦的。我也无法在网上找到这样一个基本案例的答案。

但是,这是应用代码:

import web
from project import code

urls = (
    "/page", "/Page",
    "/", "Index"
    )

app = web.application(urls, globals())

# Little hack so that debug mode works with sessions.
if web.config.get('_session') is None:
    store = web.session.DiskStore('sessions')
    session = web.session.Session(app, store, initializer={'data':None})
    web.config._session = session
else:
    session = web.config._session

render = web.template.render('templates/', base="layout")

class Index():
    def GET(self):
    # This is used to "setup" the session with starting values.
    # code.START contains a dict "whatnext"
    # that assigns keywords to information what to do next.
    # It also contains a attribute "name"
    session.data = code.START
    web.seeother("/page")

class Page(object):
    def GET(self):
    if session.data:
        return render.page(data=session.data)
    else:
    # This is here in case someone puts "/page" directly as URL.
    # wrong_page just has a link to "/" and everything will be fine
    # from there on.
        return render.wrong_page()

    def POST(self):
    form = web.input(action=None)
    if form.action in session.data.whatnext:
        # The method .go returns what to do next according to the
        # keywords.
        session.data = session.data.go(form.action)

    web.seeother("/page")

if __name__ == "__main__":
    app.run()

代码本身不是问题的范围,但如有必要,我可以提供。

但是,page.html看起来像这样

$def with (data)

Something something dependend on the data.

$if data.name == "finished":
    <p><a href="/"> Again? </a></p>
$else:
    <p>
    <form action="/page" method="POST">
    <input type="text" name="action"> <input type="SUBMIT">
    </form>
    </p>

在测试中使用以下内容:

from nose.tools import *
import re

def assert_response(resp, contains=None, status="200"):

    assert status in resp.status, "Excpected response %r not in %r" % (status, 
resp.status)

    if status == "200":
    assert resp.data, "Response data is empty."

    if contains:
    assert contains in resp.data, "Response does not contain %r" % contains

这是实际测试:

from nose.tools import *
from bin.app import app # the code above
from tests.tools import assert_response

def test_redirect():
    # Check that we get a 303 on the / URL
    resp = app.request("/")
    assert_response(resp, status="303")

def test_wrong_page():
    # test the first GET request to /game
    resp = app.request("/page")
    assert_response(resp, contains="Go here instead")

def test_page
    # test that we get expected values
    what_to_do = {'action' : 'foo'}
    resp = app.request("/page", method="POST", data=what_to_do)
    assert_response(resp, contains="something specific according to foo")

前两个测试按预期工作。 第三个测试不起作用,我认为是因为/ page需要session.data才能运行。

我得到了ouptut:

Traceback (most recent call last):
  File "/.../nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/.../tests/app_tests.py", line 19, in test_page
    assert_response(resp, contains="something specific according to foo")
  File "/.../tests/tools.py", line 17, in assert_response
    resp.status)
AssertionError: Excpected response '200' not in '500 Internal Server Error'

由于我不知道如何在测试中初始化会话/会话数据,我的问题是:我该怎么做,自动测试可以使用给定的会话信息运行。

1 个答案:

答案 0 :(得分:1)

您不需要在测试中初始化会话,因为当您进行app.request()调用时,您的应用会自动为您启动会话。这里的问题是你没有在测试中维护会话ID(你的测试就像任何浏览器一样的客户端)。

解决方案是,当您创建第一个app.request()时,在响应头中记录会话ID。然后在进行后续app.request()

时提供会话ID

这是我的代码:

首先,我在tests / tools.py中创建一个帮助函数,从响应头中提取会话ID:

def get_session_id(resp):
    cookies_str = resp.headers['Set-Cookie']
    if cookies_str:
        for kv in cookies_str.split(';'):
            if 'webpy_session_id=' in kv:
                return kv

然后将测试写为:

def test_session():
    resp = app.request('/')
    session_id = get_session_id(resp)

    resp1 = app.request('/game', headers={'Cookie':session_id})
    assert_response(resp1, status='200', contains='Central Corridor')