MDL-27408 question engine upgrade, change to update the quiz settings in config_plugins.

Also start creating the unit tests for the upgrade.

question/engine/upgrade/behaviourconverters.php

@@ -261,7 +261,20 @@ abstract class question_behaviour_attempt_updater {
      * @return qtype_updater
      */
     protected function make_qtype_updater() {
-        $class = 'qtype_' . $this->question->qtype . '_updater';
+        global $CFG;
+        $path = $CFG->dirroot . '/question/type/' . $this->question->qtype . '/db/upgradelib.php';
+        if (!is_readable($path)) {
+            throw new coding_exception("Question type {$this->question->qtype}
+                    is missing important code (the file {$path})
+                    required to run the upgrade to the new question engine.");
+        }
+        include_once($path);
+        $class = 'qtype_' . $this->question->qtype . '_qe2_attempt_updater';
+        if (!class_exists($class)) {
+            throw new coding_exception("Question type {$this->question->qtype}
+                    is missing important code (the class {$class})
+                    required to run the upgrade to the new question engine.");
+        }
         return new $class($this, $this->question, $this->logger);
     }
 

question/engine/upgrade/simpletest/helper.php

@@ -0,0 +1,114 @@
+<?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/>.
+
+/**
+ * This file contains test helper code for testing the upgrade to the new
+ * question engine. The acutal tests are organised by question type in files
+ * like question/type/truefalse/db/simpletest/testupgradelibnewqe.php.
+ *
+ * @package    moodlecore
+ * @subpackage questionengine
+ * @copyright  2009 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once(dirname(__FILE__) . '/../upgradelib.php');
+
+
+/**
+ * Subclass of question_engine_attempt_upgrader to help with testing.
+ *
+ * @copyright  2009 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class test_question_engine_attempt_upgrader extends question_engine_attempt_upgrader {
+    public function prevent_timeout() {
+    }
+
+    public function __construct($loader, $logger) {
+        $this->questionloader = $loader;
+        $this->logger = $logger;
+    }
+}
+
+
+/**
+ * Subclass of question_engine_assumption_logger that does nothing, for testing.
+ *
+ * @copyright  2009 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class dummy_question_engine_assumption_logger extends question_engine_assumption_logger {
+    protected $attemptid;
+
+    public function __construct() {
+    }
+
+    public function log_assumption($description, $quizattemptid = null) {
+    }
+
+    public function __destruct() {
+    }
+}
+
+
+/**
+ * Subclass of question_engine_upgrade_question_loader for unit testing.
+ *
+ * @copyright  2009 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class test_question_engine_upgrade_question_loader extends question_engine_upgrade_question_loader {
+    public function put_question_in_cache($question) {
+        $this->cache[$question->id] = $question;
+    }
+
+    public function load_question($questionid, $quizid) {
+        global $CFG, $QTYPES;
+
+        if (isset($this->cache[$questionid])) {
+            return $this->cache[$questionid];
+        }
+
+        return null;
+    }
+}
+
+
+/**
+ * Base class for tests that thest the upgrade of one particular attempt and
+ * one question.
+ *
+ * @copyright  2009 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class question_attempt_upgrader_test_base extends UnitTestCase {
+    protected $updater;
+    protected $loader;
+
+    public function setUp() {
+        $logger = new dummy_question_engine_assumption_logger();
+        $this->loader = new test_question_engine_upgrade_question_loader($logger);
+        $this->updater = new test_question_engine_attempt_upgrader($this->loader, $logger);
+    }
+
+    public function tearDown() {
+        $this->updater = null;
+    }
+}