angular.js/test/service/controllerSpec.js

'use strict';

describe('$controller', function() {
  var $controller;

  beforeEach(inject(function($injector) {
    $controller = $injector.get('$controller');
  }));

  it('should return instance of given controller class', function() {
    var MyClass = function() {},
        ctrl = $controller(MyClass);

    expect(ctrl).toBeDefined();
    expect(ctrl instanceof MyClass).toBe(true);
  });

  it('should inject arguments', inject(function($http) {
    var MyClass = function($http) {
      this.$http = $http;
    };

    var ctrl = $controller(MyClass);
    expect(ctrl.$http).toBe($http);
  }));


  it('should inject given scope', function() {
    var MyClass = function($scope) {
      this.$scope = $scope;
    };

    var scope = {},
        ctrl = $controller(MyClass, scope);

    expect(ctrl.$scope).toBe(scope);
  });
});