[Summary view]

Differences Between: [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Tests for the {@link core_question\engine\variants\least_used_strategy} class.
  19   *
  20   * @package   core_question
  21   * @copyright 2015 The Open University
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  global $CFG;
  28  require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
  29  
  30  
  31  /**
  32   * Tests for the {@link core_question\engine\variants\least_used_strategy} class.
  33   *
  34   * @copyright  2015 The Open University
  35   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class least_used_variant_strategy_testcase extends advanced_testcase {
  38  
  39      public function test_question_with_one_variant_always_picks_that() {
  40          $question = test_question_maker::make_question('shortanswer');
  41          $quba = question_engine::make_questions_usage_by_activity('test', context_system::instance());
  42          $quba->set_preferred_behaviour('deferredfeedback');
  43          $slot = $quba->add_question($question);
  44          $quba->start_all_questions(new core_question\engine\variants\least_used_strategy(
  45                  $quba, new qubaid_list(array())));
  46          $this->assertEquals(1, $quba->get_variant($slot));
  47      }
  48  
  49      public function test_synchronised_question_should_use_the_same_dataset() {
  50          // Actually, we cheat here. We use the same question twice, not two different synchronised questions.
  51          $question = test_question_maker::make_question('calculated');
  52          $quba = question_engine::make_questions_usage_by_activity('test', context_system::instance());
  53          $quba->set_preferred_behaviour('deferredfeedback');
  54          $slot1 = $quba->add_question($question);
  55          $slot2 = $quba->add_question($question);
  56          $quba->start_all_questions(new core_question\engine\variants\least_used_strategy(
  57                  $quba, new qubaid_list(array())));
  58          $this->assertEquals($quba->get_variant($slot1), $quba->get_variant($slot2));
  59      }
  60  
  61      public function test_second_attempt_uses_other_dataset() {
  62          global $DB;
  63          $this->resetAfterTest();
  64          $generator = $this->getDataGenerator()->get_plugin_generator('core_question');
  65  
  66          $cat = $generator->create_question_category();
  67          $questiondata = $generator->create_question('calculated', null, array('category' => $cat->id));
  68  
  69          // Create two dataset items.
  70          $adefinitionid = $DB->get_field_sql("
  71                      SELECT qdd.id
  72                        FROM {question_dataset_definitions} qdd
  73                        JOIN {question_datasets} qd ON qd.datasetdefinition = qdd.id
  74                       WHERE qd.question = ?
  75                         AND qdd.name = ?", array($questiondata->id, 'a'));
  76          $bdefinitionid = $DB->get_field_sql("
  77                      SELECT qdd.id
  78                        FROM {question_dataset_definitions} qdd
  79                        JOIN {question_datasets} qd ON qd.datasetdefinition = qdd.id
  80                       WHERE qd.question = ?
  81                         AND qdd.name = ?", array($questiondata->id, 'b'));
  82          $DB->set_field('question_dataset_definitions', 'itemcount', 2, array('id' => $adefinitionid));
  83          $DB->set_field('question_dataset_definitions', 'itemcount', 2, array('id' => $bdefinitionid));
  84          $DB->insert_record('question_dataset_items', array('definition' => $adefinitionid,
  85                  'itemnumber' => 1, 'value' => 3));
  86          $DB->insert_record('question_dataset_items', array('definition' => $bdefinitionid,
  87                  'itemnumber' => 1, 'value' => 7));
  88          $DB->insert_record('question_dataset_items', array('definition' => $adefinitionid,
  89                  'itemnumber' => 2, 'value' => 6));
  90          $DB->insert_record('question_dataset_items', array('definition' => $bdefinitionid,
  91                  'itemnumber' => 2, 'value' => 4));
  92  
  93          $question = question_bank::load_question($questiondata->id);
  94  
  95          $quba1 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
  96          $quba1->set_preferred_behaviour('deferredfeedback');
  97          $slot1 = $quba1->add_question($question);
  98          $quba1->start_all_questions(new core_question\engine\variants\least_used_strategy(
  99                  $quba1, new qubaid_list(array())));
 100          question_engine::save_questions_usage_by_activity($quba1);
 101          $variant1 = $quba1->get_variant($slot1);
 102  
 103          // Second attempt should use the other variant.
 104          $quba2 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
 105          $quba2->set_preferred_behaviour('deferredfeedback');
 106          $slot2 = $quba2->add_question($question);
 107          $quba2->start_all_questions(new core_question\engine\variants\least_used_strategy(
 108                  $quba1, new qubaid_list(array($quba1->get_id()))));
 109          question_engine::save_questions_usage_by_activity($quba2);
 110          $variant2 = $quba2->get_variant($slot2);
 111  
 112          $this->assertNotEquals($variant1, $variant2);
 113  
 114          // Third attempt uses either variant at random.
 115          $quba3 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
 116          $quba3->set_preferred_behaviour('deferredfeedback');
 117          $slot3 = $quba3->add_question($question);
 118          $quba3->start_all_questions(new core_question\engine\variants\least_used_strategy(
 119                  $quba1, new qubaid_list(array($quba1->get_id(), $quba2->get_id()))));
 120          $variant3 = $quba3->get_variant($slot3);
 121  
 122          $this->assertTrue($variant3 == $variant1 || $variant3 == $variant2);
 123      }
 124  }