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124 lines
6.1 KiB
124 lines
6.1 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Tests for the {@link core_question\engine\variants\least_used_strategy} class.
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*
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* @package core_question
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* @copyright 2015 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
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/**
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* Tests for the {@link core_question\engine\variants\least_used_strategy} class.
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*
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* @copyright 2015 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class least_used_variant_strategy_testcase extends advanced_testcase {
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public function test_question_with_one_variant_always_picks_that() {
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$question = test_question_maker::make_question('shortanswer');
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$quba = question_engine::make_questions_usage_by_activity('test', context_system::instance());
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$quba->set_preferred_behaviour('deferredfeedback');
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$slot = $quba->add_question($question);
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$quba->start_all_questions(new core_question\engine\variants\least_used_strategy(
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$quba, new qubaid_list(array())));
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$this->assertEquals(1, $quba->get_variant($slot));
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}
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public function test_synchronised_question_should_use_the_same_dataset() {
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// Actually, we cheat here. We use the same question twice, not two different synchronised questions.
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$question = test_question_maker::make_question('calculated');
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$quba = question_engine::make_questions_usage_by_activity('test', context_system::instance());
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$quba->set_preferred_behaviour('deferredfeedback');
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$slot1 = $quba->add_question($question);
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$slot2 = $quba->add_question($question);
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$quba->start_all_questions(new core_question\engine\variants\least_used_strategy(
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$quba, new qubaid_list(array())));
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$this->assertEquals($quba->get_variant($slot1), $quba->get_variant($slot2));
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}
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public function test_second_attempt_uses_other_dataset() {
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global $DB;
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$this->resetAfterTest();
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$generator = $this->getDataGenerator()->get_plugin_generator('core_question');
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$cat = $generator->create_question_category();
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$questiondata = $generator->create_question('calculated', null, array('category' => $cat->id));
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// Create two dataset items.
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$adefinitionid = $DB->get_field_sql("
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SELECT qdd.id
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FROM {question_dataset_definitions} qdd
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JOIN {question_datasets} qd ON qd.datasetdefinition = qdd.id
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WHERE qd.question = ?
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AND qdd.name = ?", array($questiondata->id, 'a'));
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$bdefinitionid = $DB->get_field_sql("
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SELECT qdd.id
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FROM {question_dataset_definitions} qdd
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JOIN {question_datasets} qd ON qd.datasetdefinition = qdd.id
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WHERE qd.question = ?
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AND qdd.name = ?", array($questiondata->id, 'b'));
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$DB->set_field('question_dataset_definitions', 'itemcount', 2, array('id' => $adefinitionid));
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$DB->set_field('question_dataset_definitions', 'itemcount', 2, array('id' => $bdefinitionid));
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$DB->insert_record('question_dataset_items', array('definition' => $adefinitionid,
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'itemnumber' => 1, 'value' => 3));
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$DB->insert_record('question_dataset_items', array('definition' => $bdefinitionid,
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'itemnumber' => 1, 'value' => 7));
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$DB->insert_record('question_dataset_items', array('definition' => $adefinitionid,
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'itemnumber' => 2, 'value' => 6));
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$DB->insert_record('question_dataset_items', array('definition' => $bdefinitionid,
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'itemnumber' => 2, 'value' => 4));
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$question = question_bank::load_question($questiondata->id);
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$quba1 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
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$quba1->set_preferred_behaviour('deferredfeedback');
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$slot1 = $quba1->add_question($question);
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$quba1->start_all_questions(new core_question\engine\variants\least_used_strategy(
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$quba1, new qubaid_list(array())));
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question_engine::save_questions_usage_by_activity($quba1);
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$variant1 = $quba1->get_variant($slot1);
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// Second attempt should use the other variant.
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$quba2 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
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$quba2->set_preferred_behaviour('deferredfeedback');
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$slot2 = $quba2->add_question($question);
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$quba2->start_all_questions(new core_question\engine\variants\least_used_strategy(
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$quba1, new qubaid_list(array($quba1->get_id()))));
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question_engine::save_questions_usage_by_activity($quba2);
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$variant2 = $quba2->get_variant($slot2);
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$this->assertNotEquals($variant1, $variant2);
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// Third attempt uses either variant at random.
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$quba3 = question_engine::make_questions_usage_by_activity('test', context_system::instance());
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$quba3->set_preferred_behaviour('deferredfeedback');
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$slot3 = $quba3->add_question($question);
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$quba3->start_all_questions(new core_question\engine\variants\least_used_strategy(
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$quba1, new qubaid_list(array($quba1->get_id(), $quba2->get_id()))));
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$variant3 = $quba3->get_variant($slot3);
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$this->assertTrue($variant3 == $variant1 || $variant3 == $variant2);
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}
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}
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