chaijs/chai-as-promised

Health v2 · maintenance only

Adoption not part of the score

1419 stars · 108 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Chai as Promised is a Chai plugin that adds fluent assertions about promises, such as `.should.eventually.equal(...)` and `.should.be.rejectedWith(...)`. It lets developers write expressive asynchronous test assertions without manually wiring up promise handlers.

Use cases

• assert that a promise resolves to an expected value
• assert that a promise is rejected with a specific error
• convert any existing Chai assertion into a promise-aware assertion
• test async code without manually calling done() in then handlers
• write fluent promise assertions in Mocha or other test frameworks

When to choose

• you use Chai and need to test promise-based asynchronous code
• you want readable, fluent assertions for promise fulfillment and rejection
• your test framework supports returning promises or notify(done) callbacks

When to avoid

• you use a different assertion library like Jest expect or Vitest
• your tests are purely synchronous with no promises involved
• you need a full async testing framework rather than assertion extensions

Facets

plugin · maturity stable

testing e2e-testing testing developer-tools browser chai chai-plugin assertions promises async promises-aplus nodejs javascript

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