Including them might lead to conflicts since two methods might have the
same name. For example, we're getting some exceptions when taking
screenshots of a failing test, because the method `image_path` from
`ActionView::Helpers::AssetUrlHelper` has the same name as a method used
to save the screenshot.
Besides, we were including all helpers in places were only the `dom_id`
method is used, and in other places where no helper methods were used at
all. So we can just invoke `ActionView::RecordIdentifier.dom_id`
directly.
Checking the whole text is tricky because the text has a `<br>` tag, and
now Capybara doesn't normalize whitespace by default anymore.
Here are a couple more options we could use:
```
expect(page).to have_content strip_tags(message.gsub(/\s*<br>\s*/,"\n"))
expect(page).to have_content strip_tags(message), normalize_ws: true
```
But then developers would wonder why we're doing all this, and would
need an extra effort to fully understand the test.
Since the tests are only checking the presence of the flash message,
checking a relevant part of the test is enough, works with any version
of Capybara, and makes the test easy to follow.
We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
Using the `_html` suffix in an i18n key is the same as using `html_safe`
on it, which means that translation could potentially be used for XSS
attacks.
While in theory we wouldn't need to use the `transient` nor the
`after(:create)` because there's already a `has_many :through`
association with followers, Factory Bot / ActiveRecord don't
automatically associate the followable, resulting in an invalid record
exception.
