The article intends to provide take away code to get started with unit testing while working with AngularJS. The underlying Javascript unit testing framework used for testing the AngularJS code sample is Jasmine.
You may want to pay attention to some of the following facts in relation with unit testing vis-a-vis unit testing controller methods:
// Module helloApp initialized
//
module("helloApp");
// Controller and rootScope injected for initializing
// the controller and working with scope object in "it" function blocks
//
inject(function($controller, $rootScope){
$scope = $rootScope.$new();
$controller( "HelloCtrl", {$scope:$scope});
});
Following represents the AngularJS code representing Hello world app consisting of one function named as addProfile. The demo apps could be found on following pages:
var helloApp = angular.module("helloApp", []);
helloApp.controller("HelloCtrl", function($scope) {
$scope.name = "Calvin Hobbes";
$scope.profiles = [];
$scope.addProfile = function(){
var profile = {firstname:$scope.firstname,lastname:$scope.lastname,email:$scope.email};
$scope.profiles.push( profile );
}
});
Following represents the Jasmine code sample used to test the above code. Pay attention to “BeforeEach” setup function which initializes the HelloApp and create a controller with name “HelloCtrl”. Note that the HTML page should consist of directives such as ng-app=”helloApp” and ng-controller=”HelloCtrl” appropriately.
describe( "HelloWorld Controller", function() {
//
// Defining the scope variable to be accessed within "it" function
// blocks
//
var $scope;
//
// Setup function called prior to each "it" function block
//
beforeEach(function(){
// Module helloApp initialized
//
module("helloApp");
// Controller and rootScope injected for initializing
// the controller and working with scope object in "it" function blocks
//
inject(function($controller, $rootScope){
$scope = $rootScope.$new();
$controller( "HelloCtrl", {$scope:$scope});
});
});
it( "should have default name set to Calvin Hobbes", function() {
expect($scope.name).toEqual("Calvin Hobbes");
});
it( "should have an empty profiles array to store profiles", function() {
expect($scope.profiles.length).toEqual(0);
});
it( "should add a profile to profiles store", function(){
$scope.firstname = "Chris";
$scope.lastname = "Johnson";
$scope.email = "chris.johnson@gmail.com";
$scope.addProfile();
//
// Expectations
//
expect( $scope.profiles.length ).toEqual(1);
expect( $scope.profiles[0].firstname ).toEqual( "Chris" );
expect( $scope.profiles[0].lastname ).toEqual( "Johnson" );
expect( $scope.profiles[0].email ).toEqual( "chris.johnson@gmail.com" );
});
});
We recommend you to get setup with Karma & Jasmine using instructions that could be found on following page: http://vitalflux.com/angularjs-7-steps-unit-testing-angularjs-scripts-jasmine/
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