public function test_versions() { $driver = new Migration_Driver_Mysql(Kohana::TESTING); $versions = $driver->versions()->init(); $versions->clear_all()->set(100)->set(200)->set(300); $this->assertEquals(array(100, 200, 300), $versions->get()); $versions->clear(200); $this->assertEquals(array(100, 300), $versions->get()); }