可配置数量的测试失败后，停止Mocha测试套件的执行

Question

I want to stop my test suite after a configurable number of tests fails. My test suite has different files containing Mocha tests.

I want to take input from user in order to know after how many test case failures do they want to stop execution of the complete test suite. So if the users gives 5 as an input, my test suite should stop after the 5th test cases fail.

Can anyone help me if figuring out how this can be done?

Answer 1

Here's an attempt:

// mocha-plugin-fail-after.js
const { Runner } = require('mocha');
const fail       = Runner.prototype.fail;
const opts       = require('minimist')(process.argv);
const failAfter  = Number(opts['fail-after'] || 5);

let failures = 0;
Runner.prototype.fail = function() {
  if (++failures > failAfter) {
    console.log('\nToo many failures, exiting...');
    process.exit(failures);
  }
  return fail.apply(this, arguments);
}

To use:

mocha -r mocha-plugin-fail-after --fail-after=5 test/**/*.js