grunt jasmine-node tests are running twice

Question

I set up grunt to run node.js jasmine tests. For some reason, with this config, the results always show double the tests.

Here is my config:

I'm using jasmine-node which plugs into grunt.

/spec/some-spec.js:

var myModule = require('../src/myModule.js');
describe('test', function(){
     it('works', function(done){
         setTimeout(function(){
             expect(1).toBe(1);
             done();
         }, 100);
     });
});

Gruntfile.js:

module.exports = function(grunt) {
    grunt.initConfig({
        jasmine_node: {
            options: {
                forceExit: true
            },
            all: ['spec/']
        }
    });
    grunt.loadNpmTasks('grunt-jasmine-node');
    grunt.registerTask('default', ['jasmine_node']);
};

This results in two tests running rather than one.

> grunt
Running "jasmine_node:all" (jasmine_node) task
..

Finished in 0.216 seconds
2 tests, 2 assertions, 0 failures, 0 skipped

Answer 1

The jasmine-node project is pretty old. The latest commit is from July of 2014. The grunt-jasmine-node plugin appears to be active, but running against something that is going stale seems a little pointless IMHO.

To test CommonJS modules using Jasmine I'd recommend using Karma along with the karma-jasmine and karma-commonjs plugins. I got your example working with the following files:

package.json

{
  "private": "true",
  "devDependencies": {
    "grunt": "^0.4.5",
    "grunt-jasmine-node": "^0.3.1",
    "grunt-karma": "^0.10.1",
    "jasmine-core": "^2.3.4",
    "karma": "^0.12.31",
    "karma-commonjs": "0.0.13",
    "karma-jasmine": "^0.3.5",
    "karma-phantomjs-launcher": "^0.1.4"
  }
}

karma.conf.js

module.exports = function(config) {
  config.set({
  basePath: '.',
  frameworks: ['jasmine', 'commonjs'],
  files: [{
        pattern: 'src/**/*.js'
      }, {
        pattern: 'spec/**/*.js'
      }],

  preprocessors: {
    'src/**/*.js': ['commonjs'],
    'spec/**/*.js': ['commonjs']
  },

  reporters: ['progress'],

  browsers: ['PhantomJS']
  });
};

Gruntfile.js (optional if you still want to use grunt)

module.exports = function(grunt) {
  grunt.initConfig({
    karma: {
      unit: {
        configFile: 'karma.conf.js',
        options: {
          singleRun: true
        }
      }
    }
  });
  grunt.loadNpmTasks('grunt-karma');
  grunt.registerTask('default', ['karma:unit']);
};

You should also install the karma command line runner globally, just like you probably did with grunt. npm install -g karma-cli

From your command line you can start karma by typing karma start. It will run the tests and then watch your files and re-run them on every save. (VERY NICE)

Alternatively you can run karma start --single-run to have it just run your tests once and exit. If you also updated your Gruntfile you can also just run grunt to run the tests once.