public function testSocialLoginLink()
{
$result = $this->User->socialLogin('facebook');
$this->assertEquals('<a href="/auth/facebook" class="btn btn-social btn-facebook "><i class="fa fa-facebook"></i>Sign in with Facebook</a>', $result);
$result = $this->User->socialLogin('twitter', ['label' => 'Register with']);
$this->assertEquals('<a href="/auth/twitter" class="btn btn-social btn-twitter "><i class="fa fa-twitter"></i>Register with Twitter</a>', $result);
}