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parallel-test-runner
Advanced tools
Readme
parallel-test-runner is a parallel test runner for Mocha. It runs your test files on several node processes, and does not require making any changes to your existing tests. I was able to obtain a 2-3x speed increase in running time for my existing projects by using this package, which is pretty cool.
$ npm i -S parallel-test-runner
Create a new runner file:
parallelTestRunner.js:
#!/usr/bin/env node
const {runner} = require('parallel-test-runner');
const path = require('path');
runner()
.config({
pattern: 'test/**/*.test.js', //mandatory
shuffleFiles: false, //optional
slowTestPatterns: ['SlowTestFilePattern.js'], //optional
requireFiles: [path.resolve(__dirname, '../test/setup.js')], //optional
parallelFactor: 4 //The number of processes the test runner will spawn
})
.run()
.then(() => {
process.exit(0);
})
.catch(() => {
process.exit(1);
});
Now you can simply execute ./parallelTestRunner.js to run your tests.
Running the tests in parallel might cause some of them to fail randomly. This is probably because you have concurrency issues in your tests or production code. You can try including them in the slowTestPatterns, which will run them in a separate process.
Might be added in the future.
FAQs
### Run your Mocha tests faster
We found that parallel-test-runner demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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