[1] https://github.com/avajs/ava

[2] https://github.com/substack/tape

[3] https://github.com/lukeed/uvu

Jest is great for front-end (or full stack integration) testing, but I feel it's specialized for that use-case and doesn't always play nice with backend/middle-tier testing needs.

It's a modern, fully typesafe chai replacement that works great with mocha. Very inspired by Jest (matchers, snapshots) but without magic that makes Jest hard to reason about.

The matchers cover basically all the same use cases.

Not to mention that jest's "expect.arrayContaining" and "expect.objectContaining" literally blow most other assertion libraries out of the water.

  const { deepStrictEqual: same } = require('assert');