I ended up creating a new test user and logged_in_client, which isn't really great. But I tried adding a current_session_id to the active user in the test, but that broke all other tests.
I tried setting current_session_id in all the users being tested but that didn't work either. I'd like to come back to fixing the tests and reducing the number of conftest methods in another PR. For now this fixes the bug.
Anytime a user clicks "sign out" we should be signing them out server side as well. This can be accomplished by setting the Users.current_session_id = null.
I found that the method User.logged_in_elsewhere doesn't need to check if the current_session_id is None. The current_session_ids in the cookie and db (redis or postgres) then the user should be forced to log in again.
Done using isort[1], with the following command:
```
isort -rc ./app ./tests
```
Adds linting to the `run_tests.sh` script to stop badly-sorted imports
getting re-introduced.
Chosen style is ‘Vertical Hanging Indent’ with trailing commas, because
I think it gives the cleanest diffs, eg:
```
from third_party import (
lib1,
lib2,
lib3,
lib4,
)
```
1. https://pypi.python.org/pypi/isort
This PR changes the flow to change an email address.
Once the user enter their password, they are told "Check your email".
An email has been sent to them containing a link to notify which contains an encrypted token.
The encrypted token contains the user id and new email address. Once the link is clicked the user's email address is updated to the new email address.
They are redirected to the /user-profile page.
Also in this commit is an update from flask.ext.login to flask_login.
NOTE: you can not test that the session is cleared out by checking the session cookie does not exist on the index page,
because ItsDangerousSession will create a new session when it hits the index page. The unit test confirms that the session has been cleared.
