Error: You must provide specifications for the runner in your best config.

[mohanraj-r]

I am not able to get a simple benchmark to run successfully following the instructions from Getting Started doc

Steps:

• installed "@best/cli", "@best/runner-headless" (latest versions as of Aug 5)
• added a simple benchmark.js file
• added best.config.js as per doc

module.exports = {
    projectName: 'sa11y-benchmarks',
    testMatch: ['packages/assert/__benchmarks__/rules.benchmark.js'],
};

Running yarn best gives error

$ yarn best
yarn run v1.22.4
$ ./node_modules/.bin/best

 Building benchmarks...

 Building benchmarks...
 Building benchmarks...

   DONE     (sa11y-benchmarks) packages/assert/__benchmarks__/rules.benchmark.js

 Running benchmarks...

  QUEUED    (sa11y-benchmarks) __benchmarks_results__/.../artifacts/rules.benchmark.html

  ERROR     Error: You must provide specifications for the runner in your best config.
    at runBenchmarksBundle (./node_modules/@best/runner/build/index.js:15:15)
    at Object.runBenchmarks (./node_modules/@best/runner/build/index.js:41:40)
    at Object.runBest (./node_modules/@best/cli/build/run_best.js:100:49)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async runCLI (./node_modules/@best/cli/build/cli/index.js:116:25)
    at async Object.run (./node_modules/@best/cli/build/cli/index.js:66:9)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Tried adding the following to best.config.js but the error persists

1. runner: '@best/runner-headless',
2. runnerConfig: [{ runner: '@best/runner-headless' }],
3. runnerConfig: [{ runner: '@best/runner-headless', benchmarkRunnerConfig: {} }],

[Flomb38]

Looks like something like
specs: { name: 'chrome.headless', version: 80 },
is mandatory in best.config.js