test module

_assertions.js

beforeEach(module(function($provide) {
    "use strict";
    $provide.service('_th', function($rootScope, $q) {
        this.spyOnFn = function(service, name) {
            spyOn(service, name).andCallThrough();
        };
        this.mockResponse = function(service, name, response) {
            spyOn(service, name).andReturn(response);
        };
        this.deferResponse = function(service, name, defaultResponse) {
            var deferred = $q.defer();
            spyOn(service, name).andReturn(deferred.promise);

            return {
                resolve: function(response) {
                    deferred.resolve(response || defaultResponse);
                    $rootScope.$digest();
                },
                reject: function(rejected) {
                    deferred.reject(rejected || 'test woops.');
                    $rootScope.$digest();
                }
            };
        };
    })
}));

_responses.js

var responses = {
    "data": [1,2,3]  
};

App.js

angular
    .module('appModule', [])
    .controller('App', function($scope, Service) {
        $scope.value = Service
            .callServer()   
            .then(Server.process)
            .catch(function() {
                return 1;
            })
    })
    .service('Service', function() {
        this.callServer = function() {
            return call.$promise;
        };
        this.process = function(data) {
            return 4 + data.length;
        };
        this.isTrue = function() {
            return true;
        }
    })

karma.conf

module.exports = function (config) {

    config.set({
        basePath: '../../',
        frameworks: ["jasmine"],
        files: [
            'libs/jquery/dist/jquery.js',
            'libs/angular/angular.js',
            'libs/angular-loader/angular-loader.js',
            'libs/angular-resource/angular-resource.js',
            'libs/angular-sanitize/angular-sanitize.js',
            'libs/angular-mocks/angular-mocks.js',
           
            // src-es
            'main/js/**/*.js',

            //tests
            _assertions.js
            'test/js/**/*.js'
        ],
        preprocessors: {
            '**/*.html': ['ng-html2js']
        },
        autoWatch: true,
        browsers: ['Chrome'],
        port: 8090,
        reporters: ['dots']
    });

};

spec.js

describe('spec:', function() {
    'use strict';

    beforeEach(module('appModule'));

    var scope = null;
    var initializeController;

    beforeEach(inject(function ($injector, $rootScope, $controller) {
        scope = $rootScope.$new();
        initializeController = function() {
            $controller('App', {$scope: scope});
        };
    }));

    describe('initialize app:', function() {
        it('pass.', inject(function(Service, _th) {
            _th.spyOnFn(Service, 'process');
            var csDfr = _th.deferResponse(Service, 'callServer', responses.data);
    
            // when
            initializeController();
            // then
            expect(scope.value).toBeUndefined();
           
            // when
            csDfr.resolve();
            // then
            expect(scope.value).toEqual(7);
        }));
    });
});