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Merge branch 'MDL-32910' of git://github.com/timhunt/moodle

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Dan Poltawski 2012-05-14 10:10:03 +08:00
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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(question_attempt_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;
}
}
/**
* Base class for question type test helpers.
*
* @copyright 2011 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class question_test_helper {
/**
* @return array of example question names that can be passed as the $which
* argument of {@link test_question_maker::make_question} when $qtype is
* this question type.
*/
abstract public function get_test_questions();
}
/**
* 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.';
/** @var array qtype => qtype test helper class. */
protected static $testhelpers = array();
/**
* 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 $maxmark the max mark to set.
* @return question_attempt the question attempt.
*/
public static function get_a_qa($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 = $USER->id;
}
public static function initialise_question_data($qdata) {
global $USER;
$qdata->id = 0;
$qdata->category = 0;
$qdata->contextid = 0;
$qdata->parent = 0;
$qdata->questiontextformat = FORMAT_HTML;
$qdata->generalfeedbackformat = FORMAT_HTML;
$qdata->defaultmark = 1;
$qdata->penalty = 0.3333333;
$qdata->length = 1;
$qdata->stamp = make_unique_id_code();
$qdata->version = make_unique_id_code();
$qdata->hidden = 0;
$qdata->timecreated = time();
$qdata->timemodified = time();
$qdata->createdby = $USER->id;
$qdata->modifiedby = $USER->id;
$qdata->hints = array();
}
public static function initialise_question_form_data($qdata) {
$formdata = new stdClass();
$formdata->id = 0;
$formdata->category = '0,0';
$formdata->usecurrentcat = 1;
$formdata->categorymoveto = '0,0';
$formdata->tags = array();
$formdata->penalty = 0.3333333;
$formdata->questiontextformat = FORMAT_HTML;
$formdata->generalfeedbackformat = FORMAT_HTML;
}
/**
* Get the test helper class for a particular question type.
* @param $qtype the question type name, e.g. 'multichoice'.
* @return question_test_helper the test helper class.
*/
public static function get_test_helper($qtype) {
global $CFG;
if (array_key_exists($qtype, self::$testhelpers)) {
return self::$testhelpers[$qtype];
}
$file = get_plugin_directory('qtype', $qtype) . '/simpletest/helper.php';
if (!is_readable($file)) {
throw new coding_exception('Question type ' . $qtype .
' does not have test helper code.');
}
include_once($file);
$class = 'qtype_' . $qtype . '_test_helper';
if (!class_exists($class)) {
throw new coding_exception('Class ' . $class . ' is not defined in ' . $file);
}
self::$testhelpers[$qtype] = new $class();
return self::$testhelpers[$qtype];
}
/**
* Call a method on a qtype_{$qtype}_test_helper class and return the result.
*
* @param string $methodtemplate e.g. 'make_{qtype}_question_{which}';
* @param string $qtype the question type to get a test question for.
* @param string $which one of the names returned by the get_test_questions
* method of the relevant qtype_{$qtype}_test_helper class.
* @param unknown_type $which
*/
protected static function call_question_helper_method($methodtemplate, $qtype, $which = null) {
$helper = self::get_test_helper($qtype);
$available = $helper->get_test_questions();
if (is_null($which)) {
$which = reset($available);
} else if (!in_array($which, $available)) {
throw new coding_exception('Example question ' . $which . ' of type ' .
$qtype . ' does not exist.');
}
$method = str_replace(array('{qtype}', '{which}'),
array($qtype, $which), $methodtemplate);
if (!method_exists($helper, $method)) {
throw new coding_exception('Method ' . $method . ' does not exist on the' .
$qtype . ' question type test helper class.');
}
return $helper->$method();
}
/**
* Question types can provide a number of test question defintions.
* They do this by creating a qtype_{$qtype}_test_helper class that extends
* question_test_helper. The get_test_questions method returns the list of
* test questions available for this question type.
*
* @param string $qtype the question type to get a test question for.
* @param string $which one of the names returned by the get_test_questions
* method of the relevant qtype_{$qtype}_test_helper class.
* @return question_definition the requested question object.
*/
public static function make_question($qtype, $which = null) {
return self::call_question_helper_method('make_{qtype}_question_{which}',
$qtype, $which);
}
/**
* Like {@link make_question()} but returns the datastructure from
* get_question_options instead of the question_definition object.
*
* @param string $qtype the question type to get a test question for.
* @param string $which one of the names returned by the get_test_questions
* method of the relevant qtype_{$qtype}_test_helper class.
* @return stdClass the requested question object.
*/
public static function get_question_data($qtype, $which = null) {
return self::call_question_helper_method('get_{qtype}_question_data_{which}',
$qtype, $which);
}
/**
* Like {@link make_question()} but returns the data what would be saved from
* the question editing form instead of the question_definition object.
*
* @param string $qtype the question type to get a test question for.
* @param string $which one of the names returned by the get_test_questions
* method of the relevant qtype_{$qtype}_test_helper class.
* @return stdClass the requested question object.
*/
public static function get_question_form_data($qtype, $which = null) {
return self::call_question_helper_method('get_{qtype}_question_form_data_{which}',
$qtype, $which);
}
/**
* 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 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;
}
/**
* 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, $variant = 1) {
$this->quba->set_preferred_behaviour($preferredbehaviour);
$this->slot = $this->quba->add_question($question, $maxmark);
$this->quba->start_question($this->slot, $variant);
}
protected function process_submission($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');
}
}