blessing-skin-server/tests/HttpTest/ViewTest/ComposersTest/LanguagesMenuComposerTest.php

<?php

namespace Tests;

class LanguagesMenuComposerTest extends TestCase
{
    public function testCompose()
    {
        $this->get('/')->assertSee('?lang=en')->assertDontSee('en_US');
        $this->get('/?key=value')->assertSee('?key=value&amp;lang=en');
    }
}