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ra-mocha-as-promised

v1.1.10

Published

A mocha.js and chai wrapper that delivers a promise-based API to get test results instead of only printing.

Downloads

1

Readme

mocha-as-promised

A mocha.js and chai wrapper that delivers a promise-based API to get test results instead of only printing. Created for Responde Aí's Bootcamp students use on their own Code LMS platform project. It also prevents infinite loops.

This library is UNSAFE as it uses eval to load the code and the test code (check out Usage to understand why).

Usage

Install the package:

npm install @ra/mocha-as-promised
# or if using yarn
yarn add @ra/mocha-as-promised

This module exports a single function:

  • runTests:
    • receives two strings: the code being tested and the test code
    • receive optional function callback to get outputs "consoles"
    • returns a promise that resolves to the test results or rejects if a test takes more than 1.5s to run
import { runTests } from '@ra/mocha-as-promised';

async function main() {
  const code = `
    /* This function will pass the first test but not the second */
    function testedFunction (param) {
      return 10;
    }
  `;

  const testCode = `
    describe('testedFunction', () => {
      it('should return the passed parameter (10)', () => {
        const param = 10;

        const result = testedFunction(param);

        expect(result).to.equal(param);
      });
      
      it('should return the passed parameter (20)', () => {
        const param = 20;

        const result = testedFunction(param);

        expect(result).to.equal(param);
      });
    });
  `;

  const callbackConsole = (value) => {
    // write our function to save outputs
  };

  const result = await runTests(code, testCode, callbackConsole);

  /*
   * Will return an object with the following format:
   * {
   *   failed: 1
   *   passed: 1,
   *   suites: [
   *     [
   *       {
   *         type: 'test',
   *         title: 'should return the passed parameter (10)',
   *         state: 'passed',
   *       },
   *       {
   *         type: 'test',
   *         title: 'should return the passed parameter (20)',
   *         state: 'failed',
   *         error: {
   *           actual: 10,
   *           expected: 20,
   *           message: 'expected 10 to equal 20',
   *           operator: 'strictEqual',
   *           stack: <Error Stack Trace>
   *         }
   *       }
   *     ]
   *   ]
   * }
   *
   * May reject if code takes more than 1.5s to run.
   */
}