Unit test lodash function in jasmine - javascript

I have a directive whose controller function has _.union method being called.
$scope.arr = _.union($scope.$parent.arr,$scope.$parent.DDC.arr);
When i run my test cases, all the test-cases are failing because of the above line. If i comment out the above line, everything passes.
Below is my test-case:
describe("directive: Testing Modules", function() {
// Suite for testing an individual piece of our feature.
describe('Test Directive', function() {
var $compile, scope, elm,directive;
module('app');
beforeEach(module('templates'));
beforeEach(function() {
inject(function(_$rootScope_, _$compile_) {
$compile = _$compile_;
scope = _$rootScope_.$new();
});
inject(function($compile) {
elm = $compile('<directive></directive>')(scope);
scope.$digest();
directive = elm.scope();
});
});
describe('key date list Directive Initialization Test cases', function(){
it('directive should exist', function(){
expect(directive).toBeDefined();
})
it('arr variable should exist', function(){
expect(directive.arr).toBeDefined();
})
it('arr variable should be type of boolean', function(){
expect(directive.arr).toEqual(jasmine.any(Object));
})
})
});
});
In my karma.conf.js, i have included, above my app.js too.
'bower_components/ng-lodash/build/ng-lodash.min.js',

Related

How to test that my service returns data with jasmine and angularjs

I've begun using jasmine to test my controllers in angularjs however after reading some tutorials I am a bit stuck.
I have this simple angularjs controller called jasmineController
(function () {
"use strict";
var myAppModule = angular.module('myApp');
myAppModule.controller('jasmineController', ['$scope', 'genericService',
function ($scope, genericService) {
$scope.name = 'Superhero';
$scope.counter = 0;
$scope.$watch('name', function (newValue, oldValue) {
$scope.counter = $scope.counter + 1;
});
$scope.testPromise = function() {
return genericService.getAll("dashboard", "currentnews", null, null, null);
}
$scope.getNewsItems = function () {
genericService.getAll("dashboard", "currentnews", null, null, null).then(function (data) {
$scope.name = 'Superhero';
$scope.newsItems = data;
});
}
}
]);
})();
In my jasmine test I wanted to call getNewsItems and check that it can call genericService.getAll and that $scope.newsItems is assigned some data. I understand that I would be mocking out the service and I won't actually call it.
Here is my spec
describe("test", function () {
// Declare some variables required for my test
var controller, scope, genericService;
// load in module
beforeEach(module("myApp"));
beforeEach(inject(function ($rootScope, $controller, _genericService_) {
genericService = _genericService_;
// assign new scope to variable
scope = $rootScope.$new();
controller = $controller('jasmineController', {
'$scope': scope
});
}));
it('sets the name', function () {
expect(scope.name).toBe('Superhero');
});
it('should assign data to scope', function() {
//var fakeHttpPromise = {success: function () { }};
scope.getNewsItems();
spyOn(genericService, 'getAll');
expect(genericService.getAll).toHaveBeenCalledWith('dashboard', 'currentnews');
});
});
I've got a spyon for genericService.getall() but apart from that I am a bit stuck with checking that my scope variable is assigned a value.
I also get this stack trace:
Error: Expected spy getAll to have been called with [ 'dashboard', 'currentnews' ] but it was never called.
at stack (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1441:11)
at buildExpectationResult (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1408:5)
at expectationResultFactory (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:533:11)
at Spec.prototype.addExpectationResult (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:293:5)
at addExpectationResult (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:477:9)
at Anonymous function (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1365:7)
at Anonymous function (file:///C:/Projects/2013/AMT2015/AMT2015.WebAPP/Scripts/tests/controllers/dashboardControllerSpec.js:49:9)
at attemptSync (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1759:9)
at QueueRunner.prototype.run (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1747:9)
at QueueRunner.prototype.execute (file:///C:/Users/nickgowdy/Local%20Settings/Application%20Data/Microsoft/VisualStudio/12.0/Extensions/4sg2jkkc.gb4/TestFiles/jasmine/v2/jasmine.js:1733:5)
You need to put the spy first before calling the test function. And you are you actually passing more parameters to the service function. So you need to test with the exact parameter list.
it('should assign data to scope', function() {
//var fakeHttpPromise = {success: function () { }};
spyOn(genericService, 'getAll');
scope.getNewsItems();
expect(genericService.getAll).toHaveBeenCalledWith('dashboard', 'currentnews',null,null,null);
});
I ended up doing this:
describe("test", function () {
// Declare some variables required for my test
var controller, scope, genericService;
// load in module
beforeEach(module("myApp"));
beforeEach(inject(function ($rootScope, $controller, _$q_, _genericService_) {
genericService = _genericService_;
var deferred = _$q_.defer();
deferred.resolve('resolveData');
spyOn(genericService, 'getAll').and.returnValue(deferred.promise);
scope = $rootScope.$new();
controller = $controller('jasmineController', {
'$scope': scope
});
}));
it('sets the name', function () {
expect(scope.name).toBe('Superhero');
});
it('should assign data to scope', function() {
//spyOn(genericService, 'getAll').and.callFake(function() {
//});
scope.getNewsItems();
scope.$apply();
expect(scope.newsItems).toBe('resolveData');
//expect(genericService.getAll).toHaveBeenCalledWith('dashboard', 'currentnews', null, null, null);
});
});
Because my test is more than just calling a service but handling a promise as well I had to inject $q. Then with spy on I say to call service and method and the return value is the deferred promise.
Finally I can look at the scope variable to see if anything is assigned with this line:
expect(scope.newsItems).toBe('resolveData');
Thanks to everyone that helped.

Testing Angular with parent controller method call

I'm trying to write unit-tests for an Angular application for the first time. Currently i'm having some problems running the tests. Running the application normally works fine, it doesn't give any errors. However, when running the tests using Karma and Jasmine i'm getting the following error:
TypeError: 'undefined' is not a function (evaluating '$scope.addActiveClassToMenuButton('menuButtonHome')')
I'm using the ui.router module. Not sure if that matters.
Parent controller
Parent controller contains the following method:
angular.module('testApp')
.controller('ParentCtrl', function ($scope, $resource) {
$scope.addActiveClassToMenuButton = function(buttonId) {
//Some code
}
}
Child controller
Child controller calls the parents method like this:
angular.module('testApp')
.controller('ChildCtrl', function ($scope, $resource) {
$scope.addActiveClassToMenuButton('menuButtonHome');
}
Child controller test file
The test file that fails:
describe('Child controller tests. ', function () {
beforeEach(module('testApp'));
var ChildCtrl, scope;
beforeEach(inject(function ($controller, $rootScope) {
scope = $rootScope.$new();
ChildCtrl = $controller('ChildCtrl', {
$scope: scope
});
}));
it('simple false test', function () {
expect(false).toBe(false);
});
});
Even though i'm not using the scope in the test yet, all tests fail because the code can't find the parents method.
Solution
Changing the test file to this worked:
describe('Child controller tests. ', function () {
beforeEach(module('testApp'));
var controller, scope, parentScope, childScope;
beforeEach(inject(function ($controller, $rootScope, $compile) {
scope = $rootScope.$new();
var el = angular.element('<div ng-controller="ParentCtrl"><div ng-controller="ChildCtrl"></div></div>');
$compile(el)(scope);
parentScope = el.scope();
childScope = el.children().scope();
}));
it('simple false test', function () {
expect(false).toBe(false);
});
});
Try this..
describe('Child controller tests. ', function () {
beforeEach(module('testApp'));
var ChildCtrl, scope;
beforeEach(inject(function ($controller, $rootScope, $compile) {
scope = $rootScope.$new();
var el = angular.element('<div ng-controller="ParentCtrl"><div ng-controller="ChildCtrl"></div></div>');
$compile(el)(scope);
// to access parent controller.
var parentScope = el.scope();
var childScope = el.children().scope();
// now you should be able to access from parent and child scopes.
}));
it('simple false test', function () {
expect(false).toBe(false);
});
});
This will instantiate ParentCtrl first and then extend the scope of it with the ChildCtrl's scope.
In the example that you have given only ChildCtrl is instantiated ParentCtrl is not instantiated.

Unable to unit test scopes inside a function

I am trying to write unit tests for my code for the first time. I can test $scopes when declared at the top of my controllers, but how can i test $scopes that are inside a $scope function?
Ctrl:
app.controller("MyCtrl", function($scope, $http, myService) {
$scope.initialiseValue = 0;
$scope.address = function (value) {
$scope.addressValue = 0;
}
});
Test:
describe('app', function () {
var app;
beforeEach(function () {
app = angular.mock.module('app')
});
describe('MyCtrl', function () {
var scope, ctrl, theService , httpMock;
beforeEach(inject(function($controller, $rootScope, myService, $httpBackend) {
scope = $rootScope.$new(),
ctrl = $controller('MyCtrl', {
$scope: scope,
$location : location,
myService: theService ,
$httpBackend: httpMock
});
}));
// This test succeeds ///////////
it('initialiseValue should be initialised to 0', function() {
console.log(scope.initialiseValue );
expect(scope.initialiseValue ).toBe(0);
});
// This test fails ///////////
it('addressValue should be initialised to 0', function() {
console.log(scope.addressValue );
expect(scope.addressValue ).toBe(0);
});
});
Error:
Expected undefined to be false.
Using Karma and Jasmine.
Any help would be appreciated.
You forgot to call the
scope.address()
function inside the test. If you do not call this function,
$scope.addressValue
can not be updated. Updated working fiddle http://jsfiddle.net/themyth92/j3pkaebw/1/

$scopeProvider <- $scope/ Unknown provider

I testing my angular-application with jasmine(http://jasmine.github.io/2.0/) and getting next error:
Unknown provider: $scopeProvider <- $scope
I know, that it's incorrect to build dependency with scope in filters, services, factories, etc., but I use $scope in controller!
Why am i getting this error? controller looks like
testModule.controller('TestCont', ['$filter', '$scope', function($filter, $scope){
var doPrivateShit = function(){
console.log(10);
};
this.lol = function(){
doPrivateShit();
};
this.add = function(a, b){
return a+b;
};
this.upper = function(a){
return $filter('uppercase')(a);
}
$scope.a = this.add(1,2);
$scope.test = 10;
$scope.search = {
};
}]);
and my test's code:
'use strict';
describe('testModule module', function(){
beforeEach(function(){
module('testModule');
});
it('should uppercase correctly', inject(function($controller){
var testCont = $controller('TestCont');
expect(testCont.upper('lol')).toEqual('LOL');
expect(testCont.upper('jumpEr')).toEqual('JUMPER');
expect(testCont.upper('123azaza')).toEqual('123AZAZA');
expect(testCont.upper('111')).toEqual('111');
}));
});
You need to manually pass in a $scope to your controller:
describe('testModule module', function() {
beforeEach(module('testModule'));
describe('test controller', function() {
var scope, testCont;
beforeEach(inject(function($rootScope, $controller) {
scope = $rootScope.$new();
testCont = $controller('TestCont', {$scope: scope});
}));
it('should uppercase correctly', function() {
expect(testCont.upper('lol')).toEqual('LOL');
expect(testCont.upper('jumpEr')).toEqual('JUMPER');
...
});
});
});
Normally, a $scope will be available as an injectable param only when the controller is attached to the DOM.
You need to associate somehow the controller to the DOM (I'm mot familiar with jasmine at all).
I am following a video tutorial from egghead (link bellow) which suggest this approach:
describe("hello world", function () {
var appCtrl;
beforeEach(module("app"))
beforeEach(inject(function ($controller) {
appCtrl = $controller("AppCtrl");
}))
describe("AppCtrl", function () {
it("should have a message of hello", function () {
expect(appCtrl.message).toBe("Hello")
})
})
})
Controller:
var app = angular.module("app", []);
app.controller("AppCtrl", function () {
this.message = "Hello";
});
I am posting it because in the answer selected we are creating a new scope. This means we cannot test the controller's scope vars, no?
link to video tutorial (1min) :
https://egghead.io/lessons/angularjs-testing-a-controller

Reduce boilerplate for testing angularjs controllers

In my angular app, I have around 30 controllers and 1 test file for each of them. Those test files always begin with something like this boilerplate:
'use strict';
describe('Controller: SomeController', function ()
{
var controller;
var scope;
beforeEach(function ()
{
module('SomeControllerModule');
inject(function ($controller, $rootScope)
{
scope = $rootScope.$new();
controller = $controller('SomeController',
{
$scope: scope
});
});
});
it('should prepare controller scope', function ()
{
console.log('scope', scope);
});
});
Is there a way to somehow make it shorter, so that I don't have to repeat it in each of my files?
There's ng-describe which looks like it could be very useful (I haven't used it personally yet). With that your code becomes something like:
ngDescribe({
modules: 'SomeControllerModule',
controllers: 'controller',
tests: function (deps) {
it('should prepare controller scope', function () {
console.log('scope', deps.controller);
});
}
});
Unfortunately they don't support jasmine at the moment which probably rules it out for a lot of people.
Yes, I have a cleaner way of doing it:
describe('HomeController', function() {
var $scope;
beforeEach(module('app'));
beforeEach(inject(function($rootScope, $controller) {
$scope = $rootScope.$new();
$controller('HomeController', { $scope: $scope });
}));
it('true should be truthy', function() {
expect(true).toBeTruthy();
});
});
Also check out this AngularJS Scaffolding that comes with all nuts and bolts you might need in your AngularJS project.

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