ApplicationTest::testStaticUrlWithCDN PHP Method

    public function testStaticUrlWithCDN()
    {
        config(['koel.cdn.url' => 'http://cdn.bar']);
        $this->assertEquals(App::staticUrl(), 'http://cdn.bar/');
        $this->assertEquals(App::staticUrl('foo.css  '), 'http://cdn.bar/foo.css');
    }