<?php use PHPUnit\Framework\TestCase; require_once __DIR__ . "/k.php"; class BubblesortOnceTest extends TestCase { public function testExample() { $this->assertEquals(array(7, 5, 3, 1, 2, 4, 6, 8, 9), bubblesort_once(array(9, 7, 5, 3, 1, 2, 4, 6, 8))); } }