MDL-79884 qtype_ordering: Add unit coverage and exemptions

Part of: MDL-79863

question/type/ordering/lib.php

@@ -32,6 +32,8 @@
  * @param array $args extra arguments
  * @param bool $forcedownload whether or not force download
  * @param array $options additional options affecting the file serving
+ * @codeCoverageIgnore
+ * This code can not be tested currently as pluginfile() is not testable.
  */
 function qtype_ordering_pluginfile(stdClass $course, stdClass $cm, stdClass $context, string $filearea, array $args,
         bool $forcedownload, array $options = []) {

question/type/ordering/tests/coverage.php

@@ -0,0 +1,37 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Coverage information for the qtype_ordering subsystem.
+ *
+ * @copyright  2023 Mathew May <mathew.solutions>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+return new class extends phpunit_coverage_info {
+    /** @var array The list of folders relative to the plugin root to include in coverage generation. */
+    protected $includelistfolders = [
+        'backup',
+    ];
+
+    /** @var array The list of files relative to the plugin root to include in coverage generation. */
+    protected $includelistfiles = [
+        'edit_ordering_form.php',
+        'question.php',
+        'questiontype.php',
+    ];
+};