Happyr\LinkedIn\LinkedIn::hasError PHP Method

    public function hasError()
    {
        return GlobalVariableGetter::has('error');
    }

 public function testHasError()
 {
     $linkedIn = new LinkedIn(self::APP_ID, self::APP_SECRET);
     unset($_GET['error']);
     $this->assertFalse($linkedIn->hasError());
     $_GET['error'] = 'foobar';
     $this->assertTrue($linkedIn->hasError());
 }