Multi target

[eliasson]

The current version of Garanti only supports the Erlang target. This was a well known limitation when I started, I wanted to use OTP, it was one of the driving factors. And I intended to use it on my backend project. Now I have an idea for a frontend thingy in Luster and I would like to have both Erlang and JavaScript support.

As I still want to use OTP for test execution when running on Erlang (it keeps tests isolated, allow parallel runs, and is a nice overall model) I landed in the decision to split Garanti into three libraries:

• garanti - the core part. Defining the suite, test, assertions and implementing the matchers.
• `garanti_erlang - the original runner for Erlang. This library also contains the tests for the matchers*
• garanti_javascript - the new runner targetting JavaScript. Only a few tests for integration / smoketest.

A consuming client will then have to use both garanti and the runner they need, depending on what they target.

*) As Garanti is self-hosted in terms of tests it needs a runner, and the core project cannot introduce that dependency. So the tests needed to move.

TODO

• Extract Erlang specifics to garanti_erlang.
• Implement a new JavaScript runner.
  • Test discovery.
  • Test execution.
  • Test result reporting.
• Update documentation on how to use.
• Update CI / tooling to test and build all projects.
• Add development helper script to toggle relative dependencies to actual HEX versions (once published)