Add rfc for using ExUnit for unit tests

[iilyak]

Overview

RFC for using ExUnit for unit tests

Testing recommendations

N/A

GitHub issue number

N/A

Related Pull Requests

• Initial implementation of the RFC Exunit simplified couchdb#2039

Checklist

• Documentation is written and is accurate;
• make check passes with no errors
• Update rebar.config.script with the commit hash once this PR is rebased and merged

[garrensmith]

I think just this paragraph should be the introduction. Then the section below should be below the abstract as an actual reason why we want to move to exunit.

[garrensmith]

I find the abstracts really confusing but I think this should be more a full summary of the whole RFC. Which is something like, we want to replace eunit because it has a bunch of issues, we will use exunit instead, it solves a lot of these problems. The advantage is we would then use a modern testing framework which is consistent for unit and integration tests.

[iilyak]

@garrensmith I moved sections as you've advised.

[garrensmith]

Nice work.

[nickva]

Good stuff. Looking forward to using it in our tests.