Codeception\TestCase\WPTestCase::unlink PHP Method

    function unlink($file)
    {
        $exists = is_file($file);
        if ($exists && !in_array($file, self::$ignore_files)) {
            unlink($file);
        } elseif (!$exists) {
            $this->fail("Trying to delete a file that doesn't exist: {$file}");
        }
    }