In commit baaec3a29 we started using the JavaScript driver in tests
dealing with the user menu, and made all tests pass.
However, we didn't update some officing tests that were also passing
when there was a bug in the code. That's because now that these tests
use a JavaScript driver, the link to "Polling officers" is never present
before pressing the "Menu" item. So tests checking the link isn't
present when loading the page always pass.
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.
