Support test output in TAP format

[davidwessman]

Hello.

I have been working with Heroku CI for Ruby on Rails for a few days and have had a hard time finding any support for outputting test results in the TAP-format (https://testanything.org/tap-specification.html).

I have now created my own extended minitest_reporter for our usecase but I wondered if there would be a possibility to support it in the buildpack itself.

My questions

• Would it make sense to add TAP-output for minitest and rspec?
• What cases would you need to solve and how should it be configured?
• What makes this hard to add?

With some guidance I might be able to create a draft for an implementation.