Unit testing a Angular service call using karma/jasmine

I am getting following service undefined error when i try to unit test a service call return in my app . I spend several hours on this , but i couldn't really isolate where the issue comes from . Appreciate if anyone could help me out with this .

Firefox 38.0.0 (Windows 8.1) companyService should return a promise for getCompany function FAILED
        minErr/<@C:/Users/user1m/Documents/mycompany/WebApiRole/bower_components/angular/angular.js:63:12
        loadModules/<@C:/Users/user1m/Documents/mycompany/WebApiRole/bower_components/angular/angular.js:4138:15
        forEach@C:/Users/user1m/Documents/mycompany/WebApiRole/bower_components/angular/angular.js:323:11
        loadModules@C:/Users/user1m/Documents/mycompany/WebApiRole/bower_components/angular/angular.js:4099:5
        createInjector@C:/Users/user1m/Documents/mycompany/WebApiRole/bower_components/angular/angular.js:4025:11
        workFn@C:/Users/user1m/Documents/mycompany/WebApiRole/node_modules/angular-mocks/angular-mocks.js:2409:44
        TypeError: companyService is undefined in C:/Users/user1m/Documents/mycompany/WebApiRole/test/company/Compa
nyServiceSpec.js (line 15)
        @C:/Users/user1m/Documents/mycompany/WebApiRole/test/company/CompanyServiceSpec.js:15:16
Firefox 38.0.0 (Windows 8.1): Executed 1 of 1 (1 FAILED) ERROR (0.031 secs / 0.014 secs)    

My karma.conf.js file

 // Karma configuration

module.exports = function(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',


    // frameworks to use
    // available frameworks: http://ift.tt/1ft83uu
    frameworks: ['jasmine'],


    // list of files / patterns to load in the browser
    files: [
            'node_modules/requirejs/require.js',
            'bower_components/angular/angular.js',
            'node_modules/angular-mocks/angular-mocks.js',
            'bower_components/ng-file-upload/**/*.js',
            'bower_components/angular-ui-router/release/**/*.js',
            'bower_components/angular-bootstrap/**/*.js',
            'bower_components/angular-translate/**/*.js',
            'bower_components/angular-translate-loader-static-files/**/*.js',
            'bower_components/angular-pnotify/src/**/*.js',
            'bower_components/angular-local-storage/**/*.js',
            'bower_components/angular-loading-bar/build/**/*.js',
            'app/app.js',
            'app/**/*.js',
            'test/**/*Spec.js'
    ],


    // list of files to exclude
    exclude: [
    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: http://ift.tt/1gyw6MG
    preprocessors: {
    },


    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: http://ift.tt/1ft83KQ
    reporters: ['progress'],


     // web server port
        hostname: 'localhost',
        port: 44555,


    // enable / disable colors in the output (reporters and logs)
    colors: true,


    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,


    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,


    // start these browsers
    // available browser launchers: http://ift.tt/1ft83KU
    browsers: ['Firefox'],


    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false
  });
};

CompanyServiceSpec.js file

'use strict';

describe('companyService', function() {

    var $httpBackend, companyService;

    beforeEach(angular.mock.module('mycompany'));

    beforeEach(angular.mock.inject(function(_$httpBackend_, _companyService_) {
        $httpBackend = _$httpBackend_;
        companyService = _companyService_;
    }));

    it('should return a promise for getCompany function', function() {
        expect(typeof companyService.getCompany('foobar').then).toBe('function');
    }); 

});

CompanyService.js file

angular.module('mycompany').factory('companyService',
    function($http, mycompanyApiProvider, $upload) {
        'use strict';

        var _company = null;

        function getCompany(companyId) {
            return $http.get(mycompanyApiProvider.url('companies/' + companyId));
        }
    });

Folder structure

Folder structure : 
    |WebApiRole/Karma.Conf.js
    |WebApiRole/app/app.js
    |WebApiRole/app/company/CompanyService.js
    |WebApiRole/test/company/CompanyServiceSpec.js