The Formatter::HTML should not inherit from the MessageBuilder

[brasmusson]

Description

• The Runtime creates the MessageBuilder to always output the envelope it creates from event to the event bus. Therefore a formatter only need to listen to the :envelope events on the event bus.

This change should have been part of #1865. Since it was missed there #1890 occurred. #1891 fixed the symptom of #1890 but failed to remove the inheritance fo the Formatter::HTML

Type of change

Please delete options that are not relevant.

• Refactoring (improvements to code design or tooling that don't change behaviour)

Please add an entry to the relevant section of CHANGELOG.md as part of this pull request.

Checklist:

Your PR is ready for review once the following checklist is
complete. You can also add some checks if you want to.

• New and existing tests are passing locally and on CI
• bundle exec rubocop reports no offenses
• RDoc comments have been updated
• CHANGELOG.md has been updated

[luke-hill]

I think we need to ensure we're calling repository update if we no longer call super. Especially with the missing MessageHandler method. Which ensures that attachments are good

[brasmusson]

The HTML formatter does not have a repository, it just listens to the message stream and forwards the messages to the HTML-formatter from the html-formatter repo. It is the MessageBuilder instance in the Runtime (https://github.com/cucumber/cucumber-ruby/pull/1899/changes#diff-fc62aa05d38336fb22819196433b9acb4370acadd10dbc201a48ccbd5980df6dR178) that ensures that the full message stream is available on the event-bus and that the attachments are good.

[luke-hill]

So will the on_envelope handler for the MessageBuilder still be called when using the HTML Formatter?

Reason I ask is because we need the store_... method to be called so that attachments have their source preserved.

[brasmusson]

The Runtime creates an instance of MessageBuilder, it will register its on_envelope method on the EventBus for envelope events. When a envelope event is passed to the EventBus the on_envelope method of the MessageBuilder instance will be called. This will happen regardless of which formatters that are used during the test run.