public function delete(UnitTester $I) { $I->wantTo('Delete from cache by using APC(u) as cache backend'); $key = '_PHCA' . 'data-delete'; $cache = new Apc(new Data(['lifetime' => 20])); $I->assertFalse($cache->delete('non-existent-keys')); $I->haveInApc($key, 1); $I->assertTrue($cache->delete('data-delete')); $I->dontSeeInApc($key); }