Switch to a new testing system

Frameworks

Framework	Simultaneous Testing	Multiple Processes For Multiple Files	Global Error Handling	Builtin Babel	NPM Downloads/Month
Mocha (current)			✓
Ava	✓	✓		✓
Jest	✓	✓		✓

Request Libraries

Request Library	Uses Promises	Builtin Response Testing	Response Testing Covers Common Use Cases	Reasonable Defaults For Testing	NPM Downloads/Month
Superagent				✓
Supertest (current)		✓		✓
Supertest-As-Promised	✓	✓		✓
Assert-Request	✓	✓	✓	✓
Request				✓
Request-Promise	✓
Node-Fetch	✓			✓
Requisition	✓			✓

Notes

• (current) indicates that Koa currently uses it.
• If we use a framework with builtin babel support, we can easily use async/await in place of builtin response testing if the library supports promises.
• If a request library doesn’t have reasonable defaults, we can easily create a wrapper that does.
• If the response testing doesn’t cover common use cases, a custom helper assertion function can be used instead.

If anybody has any more columns or rows to add to either table, please leave a comment.

[tj]

I’m skeptical of stuff like this because the ecosystem will be completely different in a few months. Though I won’t stop anyone who wants to refactor things all day 😄

[PlasmaPower]

Jest looks like the best I’ve seen so far.