烧瓶测试self.app_context.push()不起作用

Question

我当前正在测试烧瓶应用程序。我有以下测试用例：

import unittest
from flask import get_flashed_messages
from portal.factory import create_app

class AuthTestConfig(object):
  SQLALCHEMY_TRACK_MODIFICATIONS = False
  TESTING = True
  LOGIN_DISABLED = False
  SERVER_NAME = 'Testing'
  SECRET_KEY = 'secret'
  DEBUG = True
  SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'

class DebugTestCase(unittest.TestCase):
  def setUp(self):
    self.app = create_app(AuthTestConfig)
    self.client = self.app.test_client(use_cookies=True)
  def test_with(self):
    with self.client:
      r = self.client.get('/user/member/')
      ms = get_flashed_messages()
      assert len(ms) == 1
      assert ms[0].startswith('You must be signed in to access ')
  def test_push(self):
    self.app_context = self.app.app_context()
    self.app_context.push()
    r = self.client.get('/user/member/')
    ms = get_flashed_messages()
    assert len(ms) == 1
    assert ms[0].startswith('You must be signed in to access ')

test_with在test_push失败时通过：

$ python -m unittest discover
E.
======================================================================
ERROR: test_push (testing.test_debug.DebugTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "testing/test_debug.py", line 37, in test_push
    ms = get_flashed_messages()
  File "/Users/vng/.virtualenvs/portal/lib/python2.7/site-packages/flask/helpers.py", line 420, in get_flashed_messages
    flashes = _request_ctx_stack.top.flashes
AttributeError: 'NoneType' object has no attribute 'flashes'
----------------------------------------------------------------------
Ran 2 tests in 0.033s

这很奇怪。我认为这可能是与烧瓶 - login有关的问题，但似乎并没有。

为什么会发生这种情况？

user_views.pys.py

的源代码

from flask_user import current_user, login_required, roles_accepted
@user_blueprint.route('/member')
@login_required
def member_page():
  if current_user.has_role('admin'):
    return redirect('/admin')
  return render_template('/user/member_page.html')

Answer 1

问题是您没有像这样的" test_push"中使用语句：

with app.test_client() as c:
    rv = c.get('/?vodka=42')
    assert request.args['vodka'] == '42'

app.test_client()将与"有关语句"一起使用时保留请求上下文。

是特定的，app.test_client()将返回FlaskClient的实例，该实例使用标志来决定Wheather在__enter__方法中保留请求上下文。这就是为什么" with语句"很重要。