JavaScript Collectors

To use Test Analytics with your JavaScript (npm) projects use the :github: test-collector-javascript package with Jest.

You can also upload test results by importing JSON or JUnit XML.

Jest collector

Test Analytics ships with a Jest test collector. If you're already using Jest, then you can add buildkite-collector/jest/reporter to your list of reporters to collect your test results into your Test Analytics dashboard.

Before you start, make sure Jest runs with access to CI environment variables.

  1. In your CI environment, set the BUILDKITE_ANALYTICS_TOKEN environment variable securely to your Buildkite Test Analytics API token.

  2. Create a new branch:

    $ git checkout -b install-buildkite-test-analytics
  3. Install buildkite-test-collector using your package manager.


    $ npm install --dev buildkite-test-collector


    $ yarn add --dev buildkite-test-collector
  4. Add "buildkite-test-collector/jest/reporter" to Jest's reporters configuration array (typically found in jest.config.js, jest.config.js, or package.json):

      "reporters": ["default", "buildkite-test-collector/jest/reporter"]
  5. Commit and push your changes:

     $ git add .
     $ git commit -m "Install and set up Buildkite Test Analytics"
     $ git push

Once you're done, in your Test Analytics dashboard, you'll see analytics of test executions on all branches that include this code.

If you don't see branch names, build numbers, or commit hashes in the Test Analytics UI, then see CI Environments to learn more about exporting your environment to Jest.

Troubleshooting missing test executions and --forceExit

Using the --forceExit option when running Jest could result in missing test executions from Test Analytics.

--forceExit could potentially terminate any ongoing processes that are attempting to send test executions to Buildkite.

We recommend using --detectOpenHandles to track down open handles which are preventing Jest from exiting cleanly.