Fetching contributors…
Cannot retrieve contributors at this time
135 lines (85 sloc) 4.85 KB

Maintaining Dependency Status devDependency Status


Be kind to everyone. Read and adhere to the Code of Conduct.


  • npm test: Lint the code and run the entire test suite with coverage.
  • npm run test-win: Run the tests on Windows.
  • tap test/fork.js --bail: Run a specific test file and bail on the first failure (useful when hunting bugs).

Release process

  • Bump dependencies.
  • Ensure Travis CI and AppVeyor are green.
  • If necessary, update the engines field in package.json
  • Publish a new version using np with a version number according to semver.
  • Write a release note following the style of previous release notes.

Pull requests

  • New features should come with tests and documentation.
  • Ensure the contributing guidelines are followed.
  • At least one team member must LGTM a pull request before it's merged.
  • Squash commits when merging. Example

Issue labels

Add labels when triaging issues:

  • babel: Use this when the issue relates to our Babel infrastructure
  • blocked: Use this when the issue is blocked. Please leave a comment or edit the issue description with what is blocking the issue
  • bug: Use this for AVA bugs
  • DO NOT MERGE: Use this for exploratory pull requests that must not be merged
  • docs: Use this to track documentation improvements
  • enhancement: Use this for feature requests
  • good for beginner: Use this for issues that are good for beginners
  • help wanted: Use this for issues where we'd really love help from people outside the core team
  • performance: Use this for performance related issues
  • question: Use this for issues that are in a discussion phase

Please note the priority labels:

  • priority: Issues to tackle as soon as possible
  • low priority: Issues we'd like to see progress on
  • future: Issues we're not planning on getting to anytime soon. These are the long term suggestions for which we're unlikely to accept PRs

Use the assigned label when somebody is working on the issue so we can avoid duplicated effort.


You should first install iron-node and / or devtool globally:

$ npm install --global iron-node devtool

In the root of a project using AVA, run:

$ iron-node node_modules/ava/profile.js <test-file>


$ devtool node_modules/ava/profile.js <test-file>

Once the Dev Tools window has loaded, activate Memory or CPU profiling, and then hit Cmd R to rerun the tests.

As soon as the tests finish, stop the recording and inspect the profiler results. The flamegraph can be displayed by choosing Chart from the drop down on the Profiles tab (other views include Tree (top down) and Heavy (bottom up)).

You may also want to check out the Settings page in Dev Tools and enable one or more options in the Profiling section.

Helpful resources


First collect benchmark data for a branch/commit:

$ node bench/run

Once you have collected data from two/three branches/commits:

$ node bench/compare

You could for example gather benchmark data from the working tree and the last commit.

You can now launch a subset of the suite:

$ node bench/run.js concurrent/sync.js serial/sync.js -- concurrent/sync.js -- serial/sync.js

Note the -- separator. The above would be the same as benchmarking all three of the following commands.

$ ava concurrent/sync.js serial/sync.js
$ ava concurrent/sync.js
$ ava serial/sync.js

Also if you are benchmarking a suite that should fail, you must add the --should-fail flag in that group:

$ node bench/run.js concurrent/sync.js -- --should-fail other/failures.js

The above benchmarks two commands, but expects the second one to fail.

Onboarding new core members

  • Add the user to the and package.json.
  • Add the user as a collaborator to all AVA related repos and npm packages.
  • Share the Twitter account login info and encourage to tweet/retweet relevant stuff.