AngularJS Unit tests Unit test a directive


Example

Directive code

angular.module('myModule', [])
  .directive('myDirective', function() {
    return {
      template: '<div>{{greeting}} {{name}}!</div>',
      scope: {
        name: '=',
        greeting: '@'
      }
    };
  });

The test

describe('myDirective', function() {
  var element, scope;
  beforeEach(function() {
    module('myModule');
    inject(function($compile, $rootScope) {
      scope = $rootScope.$new();
      element = angular.element("<my-directive name='name' greeting='Hello'></my-directive>");
      $compile(element)(scope);
      /* PLEASE NEVER USE scope.$digest(). scope.$apply use a protection to avoid to run a digest loop when there is already one, so, use scope.$apply() instead. */
      scope.$apply();
    })
  });

  it('has the text attribute injected', function() {
    expect(element.html()).toContain('Hello');
  });

  it('should have proper message after scope change', function() {
    scope.name = 'John';
    scope.$apply();
    expect(element.html()).toContain("John");
    scope.name = 'Alice';
    expect(element.html()).toContain("John");
    scope.$apply();
    expect(element.html()).toContain("Alice");
  });
});

Run!