In the officing tests, we were accessing `admin.user` after starting the
browser with a `visit`. However, since `admin` is a method with a `let`
block, the administrator isn't created in the database until we
referenced the variable, meaning we were creating the database record in
the middle of the test. Referencing the variable at the beginning of the
test solves the issue.
We were also creating records to call the `login_as` method in the users
tests, so we're moving the code to create them before the first call to
`visit`.
In the notifiable test, we were doing a loop consisting of "create()" ->
"visit" -> "create()" -> "visit!" -> (...), meaning we were creating the
second user after the first `visit`. Creating every user before the
first `visit` solves the issue.
As mentioned in commits like a586ba806, a7664ad81, 006128da5, b41fbfa52
and c480cdd91, accessing the database after starting the browser with
the `visit` method sometimes results in database corruption and failing
tests on our CI due to the process running the test accessing the
database after the process running the browser has started.
IMHO this is also a bad practice for system tests, since these tests
should be checking what users experience.
So, just like we did a few commits ago with tests that reloaded records,
we're modifying the tests to check the results of user interactions from
the point of view of the users.
Also note we aren't changing tests with the `:no_js` tag, since these
tests don't run a real browser in a separate process. In the future, we
should also change most of these tests so they don't access the database
and they use a real browser.
Finally, note that one of the tests we're changing in the shared
`notifiable_in_app` file did not check the database content, but we're
also changing it for consistency.
JavaScript is used by about 98% of web users, so by testing without it
enabled, we're only testing that the application works for a very
reduced number of users.
We proceeded this way in the past because CONSUL started using Rails 4.2
and truncating the database between JavaScript tests with database
cleaner, which made these tests terribly slow.
When we upgraded to Rails 5.1 and introduced system tests, we started
using database transactions in JavaScript tests, making these tests much
faster. So now we can use JavaScript tests everywhere without critically
slowing down our test suite.
We were displaying the total number of notifications with a message "You
have N unread notifications", but were using the total number of
notifications instead of the unread ones.
Other than simplifying the view, we can write tests using `click_link`,
which makes the tests more robust. Clicking the `.icon-notification`
element was causing some tests to fail when defining a window height of
750 pixels in the `admin_budgets` branch.
