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helpers.php
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<?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 helper classes for testing the question engine.
*
* @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__) . '/../lib.php');
/**
* Makes some protected methods of question_attempt public to facilitate testing.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class testable_question_attempt extends question_attempt {
public function add_step($step) {#
parent::add_step($step);
}
public function set_min_fraction($fraction) {
$this->minfraction = $fraction;
}
public function set_behaviour(question_behaviour $behaviour) {
$this->behaviour = $behaviour;
}
}
/**
* This class creates questions of various types, which can then be used when
* testing.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class test_question_maker {
const STANDARD_OVERALL_CORRECT_FEEDBACK = 'Well done!';
const STANDARD_OVERALL_PARTIALLYCORRECT_FEEDBACK = 'Parts, but only parts, of your response are correct.';
const STANDARD_OVERALL_INCORRECT_FEEDBACK = 'That is not right at all.';
/**
* Just make a question_attempt at a question. Useful for unit tests that
* need to pass a $qa to methods that call format_text. Probably not safe
* to use for anything beyond that.
* @param question_definition $question a question.
* @param number $maxmark the max mark to set.
* @return question_attempt the question attempt.
*/
public function get_a_qa($question, $maxmark = 3) {
return new question_attempt($question, 13, null, $maxmark);
}
/**
* Initialise the common fields of a question of any type.
*/
public static function initialise_a_question($q) {
global $USER;
$q->id = 0;
$q->category = 0;
$q->parent = 0;
$q->questiontextformat = FORMAT_HTML;
$q->generalfeedbackformat = FORMAT_HTML;
$q->defaultmark = 1;
$q->penalty = 0.3333333;
$q->length = 1;
$q->stamp = make_unique_id_code();
$q->version = make_unique_id_code();
$q->hidden = 0;
$q->timecreated = time();
$q->timemodified = time();
$q->createdby = $USER->id;
$q->modifiedby = $USER->id;
}
/**
* Makes a truefalse question with correct answer true, defaultmark 1.
* @return qtype_truefalse_question
*/
public static function make_a_truefalse_question() {
question_bank::load_question_definition_classes('truefalse');
$tf = new qtype_truefalse_question();
self::initialise_a_question($tf);
$tf->name = 'True/false question';
$tf->questiontext = 'The answer is true.';
$tf->generalfeedback = 'You should have selected true.';
$tf->penalty = 1;
$tf->qtype = question_bank::get_qtype('truefalse');
$tf->rightanswer = true;
$tf->truefeedback = 'This is the right answer.';
$tf->falsefeedback = 'This is the wrong answer.';
$tf->truefeedbackformat = FORMAT_HTML;
$tf->falsefeedbackformat = FORMAT_HTML;
$tf->trueanswerid = 13;
$tf->falseanswerid = 14;
return $tf;
}
/**
* Makes a multichoice question with choices 'A', 'B' and 'C' shuffled. 'A'
* is correct, defaultmark 1.
* @return qtype_multichoice_single_question
*/
public static function make_a_multichoice_single_question() {
question_bank::load_question_definition_classes('multichoice');
$mc = new qtype_multichoice_single_question();
self::initialise_a_question($mc);
$mc->name = 'Multi-choice question, single response';
$mc->questiontext = 'The answer is A.';
$mc->generalfeedback = 'You should have selected A.';
$mc->qtype = question_bank::get_qtype('multichoice');
$mc->shuffleanswers = 1;
$mc->answernumbering = 'abc';
$mc->answers = array(
13 => new question_answer(13, 'A', 1, 'A is right', FORMAT_HTML),
14 => new question_answer(14, 'B', -0.3333333, 'B is wrong', FORMAT_HTML),
15 => new question_answer(15, 'C', -0.3333333, 'C is wrong', FORMAT_HTML),
);
return $mc;
}
/**
* Makes a multichoice question with choices 'A', 'B', 'C' and 'D' shuffled.
* 'A' and 'C' is correct, defaultmark 1.
* @return qtype_multichoice_multi_question
*/
public static function make_a_multichoice_multi_question() {
question_bank::load_question_definition_classes('multichoice');
$mc = new qtype_multichoice_multi_question();
self::initialise_a_question($mc);
$mc->name = 'Multi-choice question, multiple response';
$mc->questiontext = 'The answer is A and C.';
$mc->generalfeedback = 'You should have selected A and C.';
$mc->qtype = question_bank::get_qtype('multichoice');
$mc->shuffleanswers = 1;
$mc->answernumbering = 'abc';
self::set_standard_combined_feedback_fields($mc);
$mc->answers = array(
13 => new question_answer(13, 'A', 0.5, 'A is part of the right answer', FORMAT_HTML),
14 => new question_answer(14, 'B', -1, 'B is wrong', FORMAT_HTML),
15 => new question_answer(15, 'C', 0.5, 'C is part of the right answer', FORMAT_HTML),
16 => new question_answer(16, 'D', -1, 'D is wrong', FORMAT_HTML),
);
return $mc;
}
/**
* Makes a matching question to classify 'Dog', 'Frog', 'Toad' and 'Cat' as
* 'Mammal', 'Amphibian' or 'Insect'.
* defaultmark 1. Stems are shuffled by default.
* @return qtype_match_question
*/
public static function make_a_matching_question() {
question_bank::load_question_definition_classes('match');
$match = new qtype_match_question();
self::initialise_a_question($match);
$match->name = 'Matching question';
$match->questiontext = 'Classify the animals.';
$match->generalfeedback = 'Frogs and toads are amphibians, the others are mammals.';
$match->qtype = question_bank::get_qtype('match');
$match->shufflestems = 1;
self::set_standard_combined_feedback_fields($match);
// Using unset to get 1-based arrays.
$match->stems = array('', 'Dog', 'Frog', 'Toad', 'Cat');
$match->stemformat = array('', FORMAT_HTML, FORMAT_HTML, FORMAT_HTML, FORMAT_HTML);
$match->choices = array('', 'Mammal', 'Amphibian', 'Insect');
$match->right = array('', 1, 2, 2, 1);
unset($match->stems[0]);
unset($match->stemformat[0]);
unset($match->choices[0]);
unset($match->right[0]);
return $match;
}
/**
* Makes a shortanswer question with correct ansewer 'frog', partially
* correct answer 'toad' and defaultmark 1.
* @return qtype_shortanswer_question
*/
public static function make_a_shortanswer_question() {
question_bank::load_question_definition_classes('shortanswer');
$sa = new qtype_shortanswer_question();
self::initialise_a_question($sa);
$sa->name = 'Short answer question';
$sa->questiontext = 'Name an amphibian: __________';
$sa->generalfeedback = 'Generalfeedback: frog or toad would have been OK.';
$sa->usecase = false;
$sa->answers = array(
13 => new question_answer(13, 'frog', 1.0, 'Frog is a very good answer.', FORMAT_HTML),
14 => new question_answer(14, 'toad', 0.8, 'Toad is an OK good answer.', FORMAT_HTML),
15 => new question_answer(15, '*', 0.0, 'That is a bad answer.', FORMAT_HTML),
);
$sa->qtype = question_bank::get_qtype('shortanswer');
return $sa;
}
/**
* Makes a numerical question with correct ansewer 3.14, and various incorrect
* answers with different feedback.
* @return qtype_numerical_question
*/
public static function make_a_numerical_question() {
question_bank::load_question_definition_classes('numerical');
$num = new qtype_numerical_question();
self::initialise_a_question($num);
$num->name = 'Pi to two d.p.';
$num->questiontext = 'What is pi to two d.p.?';
$num->generalfeedback = 'Generalfeedback: 3.14 is the right answer.';
$num->answers = array(
13 => new qtype_numerical_answer(13, '3.14', 1.0, 'Very good.', FORMAT_HTML, 0),
14 => new qtype_numerical_answer(14, '3.142', 0.0, 'Too accurate.', FORMAT_HTML, 0.005),
15 => new qtype_numerical_answer(15, '3.1', 0.0, 'Not accurate enough.', FORMAT_HTML, 0.05),
16 => new qtype_numerical_answer(16, '3', 0.0, 'Not accurate enough.', FORMAT_HTML, 0.5),
17 => new qtype_numerical_answer(17, '*', 0.0, 'Completely wrong.', FORMAT_HTML, 0),
);
$num->qtype = question_bank::get_qtype('numerical');
$num->ap = new qtype_numerical_answer_processor(array());
return $num;
}
/**
* Makes a truefalse question with correct ansewer true, defaultmark 1.
* @return qtype_essay_question
*/
public static function make_an_essay_question() {
question_bank::load_question_definition_classes('essay');
$essay = new qtype_essay_question();
self::initialise_a_question($essay);
$essay->name = 'Essay question';
$essay->questiontext = 'Write an essay.';
$essay->generalfeedback = 'I hope you wrote an interesting essay.';
$essay->penalty = 0;
$essay->qtype = question_bank::get_qtype('essay');
$essay->responseformat = 'editor';
$essay->responsefieldlines = 15;
$essay->attachments = 0;
$essay->graderinfo = '';
$essay->graderinfoformat = FORMAT_MOODLE;
return $essay;
}
/**
* Makes a truefalse question with correct ansewer true, defaultmark 1.
* @return question_truefalse
*/
public static function make_a_description_question() {
question_bank::load_question_definition_classes('description');
$description = new qtype_description_question();
self::initialise_a_question($description);
$description->name = 'Description question';
$description->questiontext = 'This text tells you a bit about the next few questions in this quiz.';
$description->generalfeedback = 'This is what this section of the quiz should have taught you.';
$description->qtype = question_bank::get_qtype('description');
return $description;
}
/**
* Add some standard overall feedback to a question. You need to use these
* specific feedback strings for the corresponding contains_..._feedback
* methods in {@link qbehaviour_walkthrough_test_base} to works.
* @param question_definition $q the question to add the feedback to.
*/
public static function set_standard_combined_feedback_fields($q) {
$q->correctfeedback = self::STANDARD_OVERALL_CORRECT_FEEDBACK;
$q->correctfeedbackformat = FORMAT_HTML;
$q->partiallycorrectfeedback = self::STANDARD_OVERALL_PARTIALLYCORRECT_FEEDBACK;
$q->partiallycorrectfeedbackformat = FORMAT_HTML;
$q->shownumcorrect = true;
$q->incorrectfeedback = self::STANDARD_OVERALL_INCORRECT_FEEDBACK;
$q->incorrectfeedbackformat = FORMAT_HTML;
}
}
/**
* Helper for tests that need to simulate records loaded from the database.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class testing_db_record_builder {
public static function build_db_records(array $table) {
$columns = array_shift($table);
$records = array();
foreach ($table as $row) {
if (count($row) != count($columns)) {
throw new coding_exception("Row contains the wrong number of fields.");
}
$rec = new stdClass();
foreach ($columns as $i => $name) {
$rec->$name = $row[$i];
}
$records[] = $rec;
}
return $records;
}
}
/**
* Helper base class for tests that need to simulate records loaded from the
* database.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class data_loading_method_test_base extends UnitTestCase {
public function build_db_records(array $table) {
return testing_db_record_builder::build_db_records($table);
}
}
/**
* Helper base class for tests that walk a question through a sequents of
* interactions under the control of a particular behaviour.
*
* @copyright 2009 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class qbehaviour_walkthrough_test_base extends UnitTestCase {
/** @var question_display_options */
protected $displayoptions;
/** @var question_usage_by_activity */
protected $quba;
/** @var unknown_type integer */
protected $slot;
public function setUp() {
$this->displayoptions = new question_display_options();
$this->quba = question_engine::make_questions_usage_by_activity('unit_test',
get_context_instance(CONTEXT_SYSTEM));
}
public function tearDown() {
$this->displayoptions = null;
$this->quba = null;
}
protected function start_attempt_at_question($question, $preferredbehaviour, $maxmark = null) {
$this->quba->set_preferred_behaviour($preferredbehaviour);
$this->slot = $this->quba->add_question($question, $maxmark);
$this->quba->start_all_questions();
}
protected function process_submission($data) {
$this->quba->process_action($this->slot, $data);
}
protected function manual_grade($comment, $mark) {
$this->quba->manual_grade($this->slot, $comment, $mark);
}
protected function check_current_state($state) {
$this->assertEqual($this->quba->get_question_state($this->slot), $state, 'Questions is in the wrong state: %s.');
}
protected function check_current_mark($mark) {
if (is_null($mark)) {
$this->assertNull($this->quba->get_question_mark($this->slot));
} else {
if ($mark == 0) {
// PHP will think a null mark and a mark of 0 are equal,
// so explicity check not null in this case.
$this->assertNotNull($this->quba->get_question_mark($this->slot));
}
$this->assertWithinMargin($mark, $this->quba->get_question_mark($this->slot),
0.000001, 'Expected mark and actual mark differ: %s.');
}
}
/**
* @param $condition one or more Expectations. (users varargs).
*/
protected function check_current_output() {
$html = $this->quba->render_question($this->slot, $this->displayoptions);
foreach (func_get_args() as $condition) {
$this->assert($condition, $html);
}
}
protected function get_question_attempt() {
return $this->quba->get_question_attempt($this->slot);
}
protected function get_step_count() {
return $this->get_question_attempt()->get_num_steps();
}
protected function check_step_count($expectednumsteps) {
$this->assertEqual($expectednumsteps, $this->get_step_count());
}
protected function get_step($stepnum) {
return $this->get_question_attempt()->get_step($stepnum);
}
protected function get_contains_question_text_expectation($question) {
return new PatternExpectation('/' . preg_quote($question->questiontext) . '/');
}
protected function get_contains_general_feedback_expectation($question) {
return new PatternExpectation('/' . preg_quote($question->generalfeedback) . '/');
}
protected function get_does_not_contain_correctness_expectation() {
return new NoPatternExpectation('/class=\"correctness/');
}
protected function get_contains_correct_expectation() {
return new PatternExpectation('/' . preg_quote(get_string('correct', 'question')) . '/');
}
protected function get_contains_partcorrect_expectation() {
return new PatternExpectation('/' . preg_quote(get_string('partiallycorrect', 'question')) . '/');
}
protected function get_contains_incorrect_expectation() {
return new PatternExpectation('/' . preg_quote(get_string('incorrect', 'question')) . '/');
}
protected function get_contains_standard_correct_combined_feedback_expectation() {
return new PatternExpectation('/' . preg_quote(test_question_maker::STANDARD_OVERALL_CORRECT_FEEDBACK) . '/');
}
protected function get_contains_standard_partiallycorrect_combined_feedback_expectation() {
return new PatternExpectation('/' . preg_quote(test_question_maker::STANDARD_OVERALL_PARTIALLYCORRECT_FEEDBACK) . '/');
}
protected function get_contains_standard_incorrect_combined_feedback_expectation() {
return new PatternExpectation('/' . preg_quote(test_question_maker::STANDARD_OVERALL_INCORRECT_FEEDBACK) . '/');
}
protected function get_does_not_contain_feedback_expectation() {
return new NoPatternExpectation('/class="feedback"/');
}
protected function get_does_not_contain_num_parts_correct() {
return new NoPatternExpectation('/class="numpartscorrect"/');
}
protected function get_contains_num_parts_correct($num) {
$a = new stdClass();
$a->num = $num;
return new PatternExpectation('/<div class="numpartscorrect">' .
preg_quote(get_string('yougotnright', 'question', $a)) . '/');
}
protected function get_does_not_contain_specific_feedback_expectation() {
return new NoPatternExpectation('/class="specificfeedback"/');
}
protected function get_contains_validation_error_expectation() {
return new ContainsTagWithAttribute('div', 'class', 'validationerror');
}
protected function get_does_not_contain_validation_error_expectation() {
return new NoPatternExpectation('/class="validationerror"/');
}
protected function get_contains_mark_summary($mark) {
$a = new stdClass();
$a->mark = format_float($mark, $this->displayoptions->markdp);
$a->max = format_float($this->quba->get_question_max_mark($this->slot),
$this->displayoptions->markdp);
return new PatternExpectation('/' .
preg_quote(get_string('markoutofmax', 'question', $a)) . '/');
}
protected function get_contains_marked_out_of_summary() {
$max = format_float($this->quba->get_question_max_mark($this->slot),
$this->displayoptions->markdp);
return new PatternExpectation('/' .
preg_quote(get_string('markedoutofmax', 'question', $max)) . '/');
}
protected function get_does_not_contain_mark_summary() {
return new NoPatternExpectation('/<div class="grade">/');
}
protected function get_contains_checkbox_expectation($baseattr, $enabled, $checked) {
$expectedattributes = $baseattr;
$forbiddenattributes = array();
$expectedattributes['type'] = 'checkbox';
if ($enabled === true) {
$forbiddenattributes['disabled'] = 'disabled';
} else if ($enabled === false) {
$expectedattributes['disabled'] = 'disabled';
}
if ($checked === true) {
$expectedattributes['checked'] = 'checked';
} else if ($checked === false) {
$forbiddenattributes['checked'] = 'checked';
}
return new ContainsTagWithAttributes('input', $expectedattributes, $forbiddenattributes);
}
protected function get_contains_mc_checkbox_expectation($index, $enabled = null, $checked = null) {
return $this->get_contains_checkbox_expectation(array(
'name' => $this->quba->get_field_prefix($this->slot) . $index,
'value' => 1,
), $enabled, $checked);
}
protected function get_contains_radio_expectation($baseattr, $enabled, $checked) {
$expectedattributes = $baseattr;
$forbiddenattributes = array();
$expectedattributes['type'] = 'radio';
if ($enabled === true) {
$forbiddenattributes['disabled'] = 'disabled';
} else if ($enabled === false) {
$expectedattributes['disabled'] = 'disabled';
}
if ($checked === true) {
$expectedattributes['checked'] = 'checked';
} else if ($checked === false) {
$forbiddenattributes['checked'] = 'checked';
}
return new ContainsTagWithAttributes('input', $expectedattributes, $forbiddenattributes);
}
protected function get_contains_mc_radio_expectation($index, $enabled = null, $checked = null) {
return $this->get_contains_radio_expectation(array(
'name' => $this->quba->get_field_prefix($this->slot) . 'answer',
'value' => $index,
), $enabled, $checked);
}
protected function get_contains_hidden_expectation($name, $value = null) {
$expectedattributes = array('type' => 'hidden', 'name' => s($name));
if (!is_null($value)) {
$expectedattributes['value'] = s($value);
}
return new ContainsTagWithAttributes('input', $expectedattributes);
}
protected function get_does_not_contain_hidden_expectation($name, $value = null) {
$expectedattributes = array('type' => 'hidden', 'name' => s($name));
if (!is_null($value)) {
$expectedattributes['value'] = s($value);
}
return new DoesNotContainTagWithAttributes('input', $expectedattributes);
}
protected function get_contains_tf_true_radio_expectation($enabled = null, $checked = null) {
return $this->get_contains_radio_expectation(array(
'name' => $this->quba->get_field_prefix($this->slot) . 'answer',
'value' => 1,
), $enabled, $checked);
}
protected function get_contains_tf_false_radio_expectation($enabled = null, $checked = null) {
return $this->get_contains_radio_expectation(array(
'name' => $this->quba->get_field_prefix($this->slot) . 'answer',
'value' => 0,
), $enabled, $checked);
}
protected function get_contains_cbm_radio_expectation($certainty, $enabled = null, $checked = null) {
return $this->get_contains_radio_expectation(array(
'name' => $this->quba->get_field_prefix($this->slot) . '-certainty',
'value' => $certainty,
), $enabled, $checked);
}
protected function get_contains_button_expectation($name, $value = null, $enabled = null) {
$expectedattributes = array(
'type' => 'submit',
'name' => $name,
);
$forbiddenattributes = array();
if (!is_null($value)) {
$expectedattributes['value'] = $value;
}
if ($enabled === true) {
$forbiddenattributes['disabled'] = 'disabled';
} else if ($enabled === false) {
$expectedattributes['disabled'] = 'disabled';
}
return new ContainsTagWithAttributes('input', $expectedattributes, $forbiddenattributes);
}
protected function get_contains_submit_button_expectation($enabled = null) {
return $this->get_contains_button_expectation(
$this->quba->get_field_prefix($this->slot) . '-submit', null, $enabled);
}
protected function get_tries_remaining_expectation($n) {
return new PatternExpectation('/' . preg_quote(get_string('triesremaining', 'qbehaviour_interactive', $n)) . '/');
}
protected function get_invalid_answer_expectation() {
return new PatternExpectation('/' . preg_quote(get_string('invalidanswer', 'question')) . '/');
}
protected function get_contains_try_again_button_expectation($enabled = null) {
$expectedattributes = array(
'type' => 'submit',
'name' => $this->quba->get_field_prefix($this->slot) . '-tryagain',
);
$forbiddenattributes = array();
if ($enabled === true) {
$forbiddenattributes['disabled'] = 'disabled';
} else if ($enabled === false) {
$expectedattributes['disabled'] = 'disabled';
}
return new ContainsTagWithAttributes('input', $expectedattributes, $forbiddenattributes);
}
protected function get_does_not_contain_try_again_button_expectation() {
return new NoPatternExpectation('/name="' .
$this->quba->get_field_prefix($this->slot) . '-tryagain"/');
}
protected function get_contains_select_expectation($name, $choices,
$selected = null, $enabled = null) {
$fullname = $this->quba->get_field_prefix($this->slot) . $name;
return new ContainsSelectExpectation($fullname, $choices, $selected, $enabled);
}
protected function get_mc_right_answer_index($mc) {
$order = $mc->get_order($this->get_question_attempt());
foreach ($order as $i => $ansid) {
if ($mc->answers[$ansid]->fraction == 1) {
return $i;
}
}
$this->fail('This multiple choice question does not seem to have a right answer!');
}
protected function get_no_hint_visible_expectation() {
return new NoPatternExpectation('/class="hint"/');
}
protected function get_contains_hint_expectation($hinttext) {
// Does not currently verify hint text.
return new ContainsTagWithAttribute('div', 'class', 'hint');
}
}