Loading a mock JSON file within Karma+AngularJS test

Question

I have an AngularJS app set up with tests using Karma+Jasmine. I have a function I want to test that takes a large JSON object, converts it to a format that\'s more consumab

Answer 1

I'm using an angular setup with angular seed. I ended up solving this with straight .json fixture files and jasmine-jquery.js. Others had alluded to this answer, but it took me a while to get all the pieces in the right place. I hope this helps someone else.

I have my json files in a folder /test/mock and my webapp is in /app.

my karma.conf.js has these entries (among others):

basePath: '../',

files: [
      ... 
      'test/vendor/jasmine-jquery.js',
      'test/unit/**/*.js',

      // fixtures
      {pattern: 'test/mock/*.json', watched: true, served: true, included: false}
    ],

then my test file has:

describe('JobsCtrl', function(){
var $httpBackend, createController, scope;

beforeEach(inject(function ($injector, $rootScope, $controller) {

    $httpBackend = $injector.get('$httpBackend');
    jasmine.getJSONFixtures().fixturesPath='base/test/mock';

    $httpBackend.whenGET('http://blahblahurl/resultset/').respond(
        getJSONFixture('test_resultset_list.json')
    );

    scope = $rootScope.$new();
    $controller('JobsCtrl', {'$scope': scope});

}));


it('should have some resultsets', function() {
    $httpBackend.flush();
    expect(scope.result_sets.length).toBe(59);
});

});

The real trick was the jasmine.getJSONFixtures().fixturesPath='base/test/mock'; I had originally set it to just test/mock but it needed the base in there. Without the base, I got errors like this:

Error: JSONFixture could not be loaded: /test/mock/test_resultset_list.json (status: error, message: undefined)
at /Users/camd/gitspace/treeherder-ui/webapp/test/vendor/jasmine-jquery.js:295

Answer 2

I've been struggling to find a solution to loading external data into my testcases. The above link: http://dailyjs.com/2013/05/16/angularjs-5/ Worked for me.

Some notes:

"defaultJSON" needs to be used as the key in your mock data file, this is fine, as you can just refer to defaultJSON.

mockedDashboardJSON.js:

'use strict'
angular.module('mockedDashboardJSON',[])
.value('defaultJSON',{
    fakeData1:{'really':'fake2'},
    fakeData2:{'history':'faked'}
});

Then in your test file:

beforeEach(module('yourApp','mockedDashboardJSON'));
var YourControlNameCtrl, scope, $httpBackend, mockedDashboardJSON;
beforeEach(function(_$httpBackend_,defaultJSON){
    $httpBackend.when('GET','yourAPI/call/here').respond(defaultJSON.fakeData1);
    //Your controller setup 
    ....
});

it('should test my fake stuff',function(){
    $httpBackend.flush();
    //your test expectation stuff here
    ....
}