Python 请求失败后，FlaskClient从g in设置cookie

在我的烧瓶测试客户端中设置cookie时出现问题。 使用boilerplate+Flask BabelEx，在我添加这些用于语言选择（在main.py中）之后：

由于TypeError而失败：

self = <tests.test_login.TestForm instance at 0x415f328c>

    def test_user_login(self):
        rv = self.app.post('/login', data=dict(
            username='admin',
            password="supersafepassword"
>       ), follow_redirects=True)

tests/test_login.py:25: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
env/local/lib/python2.7/site-packages/werkzeug/test.py:784: in post
    return self.open(*args, **kw)
env/local/lib/python2.7/site-packages/flask/testing.py:108: in open
    follow_redirects=follow_redirects)
env/local/lib/python2.7/site-packages/werkzeug/test.py:742: in open
    response = self.run_wsgi_app(environ, buffered=buffered)
env/local/lib/python2.7/site-packages/werkzeug/test.py:659: in run_wsgi_app
    rv = run_wsgi_app(self.application, environ, buffered=buffered)
env/local/lib/python2.7/site-packages/werkzeug/test.py:867: in run_wsgi_app
    app_iter = app(environ, start_response)
env/local/lib/python2.7/site-packages/flask/app.py:1836: in __call__
    return self.wsgi_app(environ, start_response)
env/local/lib/python2.7/site-packages/flask/app.py:1820: in wsgi_app
    response = self.make_response(self.handle_exception(e))
env/local/lib/python2.7/site-packages/flask/app.py:1403: in handle_exception
    reraise(exc_type, exc_value, tb)
env/local/lib/python2.7/site-packages/flask/app.py:1817: in wsgi_app
    response = self.full_dispatch_request()
env/local/lib/python2.7/site-packages/flask/app.py:1479: in full_dispatch_request
    response = self.process_response(response)
env/local/lib/python2.7/site-packages/flask/app.py:1691: in process_response
    response = handler(response)
appname/controllers/main.py:22: in set_language_cookie
    response.set_cookie('user_lang', value=g.language)
env/local/lib/python2.7/site-packages/werkzeug/wrappers.py:1008: in set_cookie
    self.charset))
env/local/lib/python2.7/site-packages/werkzeug/http.py:933: in dump_cookie
    buf = [key + b'=' + _cookie_quote(value)]
env/local/lib/python2.7/site-packages/werkzeug/_internal.py:223: in _cookie_quote
    for char in iter_bytes(b):
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

x = None

>   iter_bytes = lambda x: iter(x)
E   TypeError: 'NoneType' object is not iterable

self=
def测试用户登录（自我）：
rv=self.app.post（'/login'，data=dict(
username='admin'，
password=“supersafepassword”
>），遵循_重定向=真）
tests/test_login.py:25:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
env/local/lib/python2.7/site packages/werkzeug/test.py:784:in-post
返回自开（*args，**kw）
env/local/lib/python2.7/现场包装/烧瓶/测试。py:108:开放式
follow_重定向=follow_重定向）
env/local/lib/python2.7/site packages/werkzeug/test.py:742:打开
response=self.run\u wsgi\u应用程序（environ，buffered=buffered）
env/local/lib/python2.7/site-packages/werkzeug/test.py:659:in-run\u-wsgi\u应用程序
rv=运行应用程序（self.application，environ，buffered=buffered）
env/local/lib/python2.7/site packages/werkzeug/test.py:867:in-run\u wsgi\u应用程序
应用程序=应用程序（环境，启动响应）
env/local/lib/python2.7/site packages/flask/app.py:1836:in\uu call__
返回self.wsgi_应用程序（环境，启动响应）
env/local/lib/python2.7/site packages/flask/app.py:1820:in wsgi_app
响应=self.make\u响应（self.handle\u异常（e））
env/local/lib/python2.7/site packages/flask/app.py:1403:句柄中的异常
重放（exc_类型、exc_值、tb）
env/local/lib/python2.7/site packages/flask/app.py:1817:in wsgi_app
response=self.full\u dispatch\u request（）
env/local/lib/python2.7/site packages/flask/app.py:1479:完整发送请求
响应=自我过程\响应（响应）
env/local/lib/python2.7/site packages/flask/app.py:1691：过程中的响应
响应=处理程序（响应）
appname/controllers/main.py:22:in set\u language\u cookie
response.set\u cookie（'user\u lang'，value=g.language）
env/local/lib/python2.7/site packages/werkzeug/wrappers.py:1008:in set_cookie
自选字符集）
env/local/lib/python2.7/site-packages/werkzeug/http.py:933:in-dump_-cookie
buf=[key+b'='+\u cookie\u quote（值）]
env/local/lib/python2.7/site packages/werkzeug/_internal.py:223:in _cookie_quote
对于iter_字节（b）中的字符：
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
x=无
>iter_字节=λx:iter（x）
E类型错误：“非类型”对象不可编辑

与其他请求测试一样。

如果没有找到匹配项，则返回默认值

None

您没有在请求上设置

Accept Language

或

Cookie

头，因此将找不到匹配项，并返回该语言的

None

依次设置

g.language=None

，然后尝试将其用作

响应的值。set_cookie（）

调用失败

如果未找到匹配项，则可以指定要使用的默认值：

language = (
    request.cookies.get('user_lang') or
    # default language is English
    request.accept_languages.best_match(LANG_CHOICES, default='en'))

---

非常感谢，“默认”设置修复了我的测试！哎呀，对不起。。忘了检查

self = <tests.test_login.TestForm instance at 0x415f328c>

    def test_user_login(self):
        rv = self.app.post('/login', data=dict(
            username='admin',
            password="supersafepassword"
>       ), follow_redirects=True)

tests/test_login.py:25: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
env/local/lib/python2.7/site-packages/werkzeug/test.py:784: in post
    return self.open(*args, **kw)
env/local/lib/python2.7/site-packages/flask/testing.py:108: in open
    follow_redirects=follow_redirects)
env/local/lib/python2.7/site-packages/werkzeug/test.py:742: in open
    response = self.run_wsgi_app(environ, buffered=buffered)
env/local/lib/python2.7/site-packages/werkzeug/test.py:659: in run_wsgi_app
    rv = run_wsgi_app(self.application, environ, buffered=buffered)
env/local/lib/python2.7/site-packages/werkzeug/test.py:867: in run_wsgi_app
    app_iter = app(environ, start_response)
env/local/lib/python2.7/site-packages/flask/app.py:1836: in __call__
    return self.wsgi_app(environ, start_response)
env/local/lib/python2.7/site-packages/flask/app.py:1820: in wsgi_app
    response = self.make_response(self.handle_exception(e))
env/local/lib/python2.7/site-packages/flask/app.py:1403: in handle_exception
    reraise(exc_type, exc_value, tb)
env/local/lib/python2.7/site-packages/flask/app.py:1817: in wsgi_app
    response = self.full_dispatch_request()
env/local/lib/python2.7/site-packages/flask/app.py:1479: in full_dispatch_request
    response = self.process_response(response)
env/local/lib/python2.7/site-packages/flask/app.py:1691: in process_response
    response = handler(response)
appname/controllers/main.py:22: in set_language_cookie
    response.set_cookie('user_lang', value=g.language)
env/local/lib/python2.7/site-packages/werkzeug/wrappers.py:1008: in set_cookie
    self.charset))
env/local/lib/python2.7/site-packages/werkzeug/http.py:933: in dump_cookie
    buf = [key + b'=' + _cookie_quote(value)]
env/local/lib/python2.7/site-packages/werkzeug/_internal.py:223: in _cookie_quote
    for char in iter_bytes(b):
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

x = None

>   iter_bytes = lambda x: iter(x)
E   TypeError: 'NoneType' object is not iterable

language = (
    request.cookies.get('user_lang') or
    # default language is English
    request.accept_languages.best_match(LANG_CHOICES, default='en'))