Promise testing with mocha

.gitignore

node_modules

README.md

Install

1. Clone this gist.
2. Run npm install in the gist folder
3. Run npm test

One test will pass, the other will fail but because it times out. The assertion inside of the .then() fails, stopping the code execution before the done() call. 😢

Huzzah!

Need to add .done() to the chain. See the updated test.js!

index.js

var Q = require('q');
function example() {
  var deferred = Q.defer();
  deferred.resolve(12);
  return deferred.promise;
}
module.exports = example;

package.json

{
  "name": "testing-with-promises",
  "devDependencies": {
    "mocha": "^2.1.0",
    "should": "^4.6.5",
    "should-promised": "0.0.4"
  },
  "dependencies": {
    "q": "^1.1.2"
  },
  "main": "index.js",
  "scripts": {
    "test": "mocha test.js"
  }
}

test.js

var should = require('should'),
  shouldPromised = require('should-promised'),
  example = require('./index.js');

describe('example()', function() {
  it('should return 12', function(done) {
    example().then(function(answer) {
      answer.should.equal(12);
      done();
    });
  }).done();

  it('should return 42', function(done) {
    example().then(function(answer) {
      answer.should.equal(42);
      done();
    }).done();
  });
});

Vanilla ES6 promises

(also one of your .done() is on the test suite and not the promise.)

var should = require('should'),
  shouldPromised = require('should-promised'),
  example = require('./index.js');

describe('example()', function() {
  it('should return 12', function(done) {
    example().then(function(answer) {
      answer.should.equal(12);
      done();
    }).catch(done);
  });

  it('should return 42', function(done) {
    example().then(function(answer) {
      answer.should.equal(42);
      done();
    }).catch(done);
  });
});

Huh, I thought I had tried that... but nonetheless, 🍻 for @LegitTalon!