NestedExampleTest.php

<?php

namespace Drupal\psr_0_test\Tests\Nested;

class NestedExampleTest extends \DrupalWebTestCase {
    public static function getInfo() {
        return array(
            'name' => 'PSR0 example test: PSR-0 in nested subfolders.',
            'description' => 'We want to assert that this PSR-0 test case is being discovered.',
            'group' => 'SimpleTest',
        );
    }
    function testArithmetics() {
        $this->assert(1 + 1 == 2, '1 + 1 == 2');
    }

}