运行grunt test的时候显示如下信息：
Running "connect:testserver" (connect) task Started connect web server on http://localhost:8889 Running "karma:unit" (karma) task INFO [karma]: Karma v0.12.31 server started at http://localhost:8890/ INFO [launcher]: Starting browser PhantomJS ERROR [launcher]: Cannot start PhantomJS INFO [launcher]: Trying to start PhantomJS again (1/2). ERROR [launcher]: Cannot start PhantomJS INFO [launcher]: Trying to start PhantomJS again (2/2). ERROR [launcher]: Cannot start PhantomJS ERROR [launcher]: PhantomJS failed 2 times (cannot start). Giving up. Warning: Task "karma:unit" failed. Use --force to continue. Aborted due to warnings.
karma的配置是这样的：
module.exports = function (config) {
config.set({
basePath: '../',
frameworks: ['jasmine'],
files: [
// bower:js
'bower_components/jquery/dist/jquery.js',
'bower_components/angular/angular.js',
'bower_components/bootstrap/dist/js/bootstrap.js',
'bower_components/angular-animate/angular-animate.js',
'bower_components/angular-cookies/angular-cookies.js',
'bower_components/angular-route/angular-route.js',
'bower_components/angular-sanitize/angular-sanitize.js',
'bower_components/angular-mocks/angular-mocks.js',
// endbower
'js/**/*.js',
'test/spec/**/*.js'
],
browsers: [
'PhantomJS'
],
plugins: [
'karma-phantomjs-launcher',
'karma-jasmine'
],
port: 8890
})
}请问怎么解决？谢谢