Error: 'module' not recognized - Setting up Karma and Jasmine for an Angular app integrated with Laravel

I currently have a setup where Angular and Laravel are used together in an application. In this setup, Laravel functions as an API that serves JSON data to the Angular frontend. The initial page that loads the Angular app, index.php, is served by Laravel before Angular takes control.

I've been facing challenges getting started with Karma and Jasmine testing. Whenever I try to run tests using karma start or karma start karma.conf.js from the root directory of my project, I encounter the following error:

ReferenceError: module is not defined

Here is the full output:

INFO [karma]: Karma v0.12.28 server started at http://localhost:9876/
INFO [launcher]: Starting browser Chrome
WARN [watcher]: Pattern "/Users/raph/coding/webroot/digitalocean/rugapp/public/rugapp/*.js" does not match any file.
INFO [Chrome 39.0.2171 (Mac OS X 10.9.5)]: Connected on socket 3OCUMp_xhrGtlGHwiosO with id 7897120
Chrome 39.0.2171 (Mac OS X 10.9.5) hello world encountered a declaration exception FAILED
    ReferenceError: module is not defined
        at Suite.<anonymous> (/Users/raph/coding/webroot/digitalocean/rugapp/tests/js/test.js:3:16)
        at jasmineInterface.describe (/Users/raph/coding/webroot/digitalocean/rugapp/node_modules/karma-jasmine/lib/boot.js:59:18)
        at /Users/raph/coding/webroot/digitalocean/rugapp/tests/js/test.js:1:1
Chrome 39.0.2171 (Mac OS X 10.9.5): Executed 2 of 2 (1 FAILED) (0.005 secs / 0.003 secs)

Despite the error, the Chrome browser launches with the desired content displayed.

The contents of my karma.conf.js file are detailed below:

// Karma configuration
// Generated on Mon Dec 22 2014 18:13:09 GMT-0500 (EST)

module.exports = function(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: 'public/rugapp/',


    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine'],


    // list of files / patterns to load in the browser
    files: [
      '*.html',
      '**/*.js',
      '../../tests/js/test.js',
      '../../tests/js/angular/angular-mocks.js'
    ],


    // list of files to exclude
    exclude: [

    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
    },


    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress'],


    // web server port
    port: 9876,


    // enable / disable colors in the output (reporters and logs)
    colors: true,


    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,


    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,


    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['Chrome'],


    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false
  });
};

Here's the content of my package.json file:

{
  "devDependencies": {
    "gulp": "^3.8.8",
    "karma": "^0.12.28",
    "karma-chrome-launcher": "^0.1.7",
    "karma-jasmine": "^0.3.2",
    "laravel-elixir": "*"
  }
}

test.js

describe("hello world", function() {
    var CreateInvoiceController;
    beforeEach(module("MobileAngularUiExamples"));
    beforeEach(inject(function($controller) {
        CreateInvoiceController = $controller("CreateInvoiceController");
    }));

    describe("CreateInvoiceController", function() {
        it("Should say hello", function() {
            expect(CreateInvoiceController.message).toBe("Hello");
        });
    });
});

describe("true", function() {
    it("Should be true", function() {
        expect(true).toBeTruthy();
    });
});

If you have any insights or suggestions, they would be greatly appreciated.

Answer №1

If you're struggling with your tests, here's a helpful tip.

To ensure that everything runs smoothly, make sure to load angular-mocks.js before running your tests. You can control the order of loading in the karma.conf.js file under the specified section:

// list of files / patterns to load in the browser
files: [
// include files / patterns here

In order for your test to effectively load your Angular app, follow these steps:

describe("hello world", function() {
    var $rootScope;
    var $controller;
    beforeEach(module("YourAppNameHere"));
    beforeEach(inject(function($injector) {

        $rootScope = $injector.get('$rootScope');
        $controller = $injector.get('$controller');
        $scope = $rootScope.$new();

    }));
    beforeEach(inject(function($controller) {
        YourControllerHere = $controller("YourControllerHere");

    }));

    it("Should say hello", function() {
        expect(YourControllerHere.message).toBe("Hello");
    });

});

In your controller code block,

app.controller('YourControllerHere', function() {

    this.message = "Hello";

});

Another alternative method is as follows:

describe("YourControllerHere", function() {
    var $scope;
    var controller;

    beforeEach(function() {

        module("YourAppNameHere");

        inject(function(_$rootScope_, $controller) {

            $scope = _$rootScope_.$new();
            controller = $controller("YourControllerHere", {$scope: $scope});

        });

    });

    it("Should say hello", function() {
        expect(controller.message).toBe("Hello");
    });

});

Happy testing!

Answer №2

If you encounter this error, it indicates that angular was unable to inject your module properly. The most common reason for this issue is missing references to script files. To resolve this, ensure that all your script files are correctly defined under the [files] configuration in karma. Pay close attention to the paths, especially if your script folder has a nested structure.

Scripts/Controllers/One/1.js 
Scripts/Controllers/One/2.js 

In your karma.conf.js file, list them as follows:

Scripts/Controllers/**/*.js

Answer №3

Leaving this note here for future researchers.

If you're executing angular unit tests directly in the browser without using Karma (or in plunkr or jsfiddle etc...), it might be because

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.0/angular.js"></script> 
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.0/angular-route.js"></script> 
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.0/angular-cookies.js"></script> 

    <!-- The Mocha Setup goes BETWEEN angular and angular-mocks -->
    <script>
      mocha.setup({
        "ui": "bdd",
        "reporter": "html"
      });
    </script>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.0/angular-mocks.js"></script>
    <script src="myApp.js"></script>
    <script src="myTest.js"></script> <!-- test is last -->

The Mocha Setup should be placed BETWEEN angular and angular-mocks.

Answer №4

After encountering a similar issue, I discovered that the problem stemmed from incorrectly specifying the file path for my angular-mocks in my project. Using npm to install both angular and angular-mocks, I mistakenly referenced their paths incorrectly in my Karma.conf.js configuration like so:

files: [
    'node_modules/angular/angular.js',
    'node_modules/angular/angular-mocks.js',
    'scripts/*.js',
    'tests/*.js'
],

The correct path for angular-mocks.js should have been:

'node_modules/angular-mocks/angular-mocks.js'

This seemingly small mistake could prove challenging to pinpoint, especially for beginners just starting with AngularJS unit testing.

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