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This CoginGame runner works with a node project. Mocha will be launched in the root directory and the result will be sent back to CodinGame.

What it Does

This node7.4 runner installs the dependencies using npm install. The dependencies must be specified in the package.json file at the project root as specified in the official documentation.

How to Use

In order to use this runner in your project, edit the codingame.yml file and add the following lines to your project:

    name: codingame/node-npm-runner
    version: 1.1.0-node-7.4


In this example, the student is asked to write a method toUpper() (file uppercase.js):

function toUpper(str) {
    return str.toUpperCase();
module.exports = toUpper;

In order to test the answer, the following unit test is created (file tests/test.js):

var toUpper = require('./uppercase.js');
var assert = require('assert');
it('should return HELLO', function() {
    assert.equal('HELLO', toUpper('hello'));
it('should return WORLD', function() {
    assert.equal('WORLD', toUpper('world'));

We include the unit testing library mocha in the package.json file:

    "dependencies": {
        "mocha": "*",
        "should": ">= 0.0.1"

In the lesson, the unit test can be called using:

@[Test unittest: uppercase]({"stubs":["uppercase.js"], "command":"node_modules/mocha/bin/mocha test.js --reporter list"})

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