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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/>.

/**
 * Unit tests for the drag-and-drop words into sentences question definition class.
 *
 * @package   qtype_ddwtos
 * @copyright 2012 The Open University
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();
global $CFG;

require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
require_once($CFG->dirroot . '/question/type/ddwtos/tests/helper.php');

/**
 * Unit tests for the drag-and-drop words into sentences question definition class.
 *
 * @copyright 2012 The Open University
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class qtype_ddwtos_test extends question_testcase {
    /** @var qtype_ddwtos instance of the question type class to test. */
    protected $qtype;

protected function setUp() {
        $this->qtype = question_bank::get_qtype('ddwtos');;
    }

protected function tearDown() {
        $this->qtype = null;
    }

public function assert_same_xml($expectedxml, $xml) {
        $this->assertEquals(str_replace("\r\n", "\n", $expectedxml),
                str_replace("\r\n", "\n", $xml));
    }

/**
     * Get some test question data.
     *
     * @return object the data to construct a question like
     * {@link qtype_ddwtos_test_helper::make_ddwtos_question_fox()}.
     */
    protected function get_test_question_data() {
        global $USER;

$dd = new stdClass();
        $dd->id = 0;
        $dd->category = 0;
        $dd->contextid = 0;
        $dd->parent = 0;
        $dd->questiontextformat = FORMAT_HTML;
        $dd->generalfeedbackformat = FORMAT_HTML;
        $dd->defaultmark = 1;
        $dd->penalty = 0.3333333;
        $dd->length = 1;
        $dd->stamp = make_unique_id_code();
        $dd->version = make_unique_id_code();
        $dd->hidden = 0;
        $dd->idnumber = null;
        $dd->timecreated = time();
        $dd->timemodified = time();
        $dd->createdby = $USER->id;
        $dd->modifiedby = $USER->id;

$dd->name = 'Drag-and-drop words into sentences question';
        $dd->questiontext = 'The [[1]] brown [[2]] jumped over the [[3]] dog.';
        $dd->generalfeedback = 'This sentence uses each letter of the alphabet.';
        $dd->qtype = 'ddwtos';

$dd->options = new stdClass();
        $dd->options->shuffleanswers = true;

test_question_maker::set_standard_combined_feedback_fields($dd->options);

$dd->options->answers = array(
            (object) array('answer' => 'quick', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"1";s:8:"infinite";i:0;}'),
            (object) array('answer' => 'fox', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"2";s:8:"infinite";i:0;}'),
            (object) array('answer' => 'lazy', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"3";s:8:"infinite";i:0;}'),
            (object) array('answer' => 'assiduous', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"3";s:8:"infinite";i:0;}'),
            (object) array('answer' => 'dog', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"2";s:8:"infinite";i:0;}'),
            (object) array('answer' => 'slow', 'feedback' =>
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"1";s:8:"infinite";i:0;}'),
        );

return $dd;
    }

public function test_name() {
        $this->assertEquals($this->qtype->name(), 'ddwtos');
    }

public function test_can_analyse_responses() {
        $this->assertTrue($this->qtype->can_analyse_responses());
    }

public function test_initialise_question_instance() {
        $qdata = $this->get_test_question_data();

$expected = test_question_maker::make_question('ddwtos');
        $expected->stamp = $qdata->stamp;
        $expected->version = $qdata->version;
        $expected->idnumber = null;

$q = $this->qtype->make_question($qdata);

$this->assertEquals($expected, $q);
    }

public function test_get_random_guess_score() {
        $q = $this->get_test_question_data();
        $this->assertEquals(0.5, $this->qtype->get_random_guess_score($q), '', 0.0000001);
    }

public function test_get_possible_responses() {
        $q = $this->get_test_question_data();

$this->assertEquals(array(
            1 => array(
                1 => new question_possible_response('quick', 1 / 3),
                2 => new question_possible_response('slow', 0),
                null => question_possible_response::no_response()),
            2 => array(
                1 => new question_possible_response('fox', 1 / 3),
                2 => new question_possible_response('dog', 0),
                null => question_possible_response::no_response()),
            3 => array(
                1 => new question_possible_response('lazy', 1 / 3),
                2 => new question_possible_response('assiduous', 0),
                null => question_possible_response::no_response()),
        ), $this->qtype->get_possible_responses($q));
    }

public function test_xml_import() {
 $xml = ' <question type="ddwtos">
 <name>
 <text>A drag-and-drop question</text>
 </name>
 <questiontext format="moodle_auto_format">
 <text>Put these in order: [[1]], [[2]], [[3]].</text>
 </questiontext>
 <generalfeedback>
 <text>The answer is Alpha, Beta, Gamma.</text>
 </generalfeedback>
 <defaultgrade>3</defaultgrade>
 <penalty>0.3333333</penalty>
 <hidden>0</hidden>
 <shuffleanswers>1</shuffleanswers>
 <correctfeedback>
 <text><![CDATA[Your answer is correct.]]></text>
 </correctfeedback>
 <partiallycorrectfeedback>
 <text><![CDATA[Your answer is partially correct.]]></text>
 </partiallycorrectfeedback>
 <incorrectfeedback>
 <text><![CDATA[Your answer is incorrect.]]></text>
 </incorrectfeedback>
 <shownumcorrect/>
 <dragbox>
 <text>Alpha</text>
 <group>1</group>
 </dragbox>
 <dragbox>
 <text>Beta</text>
 <group>1</group>
 </dragbox>
 <dragbox>
 <text>Gamma</text>
 <group>1</group>
 <infinite/>
 </dragbox>
 <hint>
 <text>Try again.</text>
 <shownumcorrect />
 </hint>
 <hint>
 <text>These are the first three letters of the Greek alphabet.</text>
 <shownumcorrect />
 <clearwrong />
 </hint>
 </question>';
 $xmldata = xmlize($xml);

$importer = new qformat_xml();
        $q = $importer->try_importing_using_qtypes(
                $xmldata['question'], null, null, 'ddwtos');

$expectedq = new stdClass();
        $expectedq->qtype = 'ddwtos';
        $expectedq->name = 'A drag-and-drop question';
        $expectedq->questiontext = 'Put these in order: [[1]], [[2]], [[3]].';
        $expectedq->questiontextformat = FORMAT_MOODLE;
        $expectedq->generalfeedback = 'The answer is Alpha, Beta, Gamma.';
        $expectedq->defaultmark = 3;
        $expectedq->length = 1;
        $expectedq->penalty = 0.3333333;

$expectedq->shuffleanswers = 1;
 $expectedq->correctfeedback = array('text' => 'Your answer is correct.',
 'format' => FORMAT_MOODLE);
 $expectedq->partiallycorrectfeedback = array(
 'text' => 'Your answer is partially correct.',
 'format' => FORMAT_MOODLE);
 $expectedq->shownumcorrect = true;
 $expectedq->incorrectfeedback = array('text' => 'Your answer is incorrect.',
 'format' => FORMAT_MOODLE);

$expectedq->choices = array(
            array('answer' => 'Alpha', 'choicegroup' => 1, 'infinite' => false),
            array('answer' => 'Beta', 'choicegroup' => 1, 'infinite' => false),
            array('answer' => 'Gamma', 'choicegroup' => 1, 'infinite' => true),
        );

$expectedq->hint = array(
                array('text' => 'Try again.', 'format' => FORMAT_MOODLE),
                array('text' => 'These are the first three letters of the Greek alphabet.',
                        'format' => FORMAT_MOODLE));
        $expectedq->hintshownumcorrect = array(true, true);
        $expectedq->hintclearwrong = array(false, true);

$this->assert(new question_check_specified_fields_expectation($expectedq), $q);
        $this->assertEquals($expectedq->hint, $q->hint);
    }

public function test_xml_export() {
        $qdata = new stdClass();
        $qdata->id = 123;
        $qdata->contextid = \context_system::instance()->id;
        $qdata->idnumber = null;
        $qdata->qtype = 'ddwtos';
        $qdata->name = 'A drag-and-drop question';
        $qdata->questiontext = 'Put these in order: [[1]], [[2]], [[3]].';
        $qdata->questiontextformat = FORMAT_MOODLE;
        $qdata->generalfeedback = 'The answer is Alpha, Beta, Gamma.';
        $qdata->generalfeedbackformat = FORMAT_MOODLE;
        $qdata->defaultmark = 3;
        $qdata->length = 1;
        $qdata->penalty = 0.3333333;
        $qdata->hidden = 0;

$qdata->options = new stdClass();
 $qdata->options->shuffleanswers = 1;
 $qdata->options->correctfeedback = 'Your answer is correct.';
 $qdata->options->correctfeedbackformat = FORMAT_MOODLE;
 $qdata->options->partiallycorrectfeedback = 'Your answer is partially correct.';
 $qdata->options->partiallycorrectfeedbackformat = FORMAT_MOODLE;
 $qdata->options->shownumcorrect = 1;
 $qdata->options->incorrectfeedback = 'Your answer is incorrect.';
 $qdata->options->incorrectfeedbackformat = FORMAT_MOODLE;

$qdata->options->answers = array(
            13 => new question_answer(13, 'Alpha', 0,
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"1";s:8:"infinite";b:0;}',
                    FORMAT_MOODLE),
            14 => new question_answer(14, 'Beta', 0,
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"1";s:8:"infinite";b:0;}',
                    FORMAT_MOODLE),
            15 => new question_answer(15, 'Gamma', 0,
                    'O:8:"stdClass":2:{s:9:"draggroup";s:1:"1";s:8:"infinite";b:1;}',
                    FORMAT_MOODLE),
        );

$qdata->hints = array(
            1 => new question_hint_with_parts(1, 'Try again.', FORMAT_MOODLE, true, false),
            2 => new question_hint_with_parts(2,
                    'These are the first three letters of the Greek alphabet.',
                    FORMAT_MOODLE, true, true),
        );

$exporter = new qformat_xml();
        $xml = $exporter->writequestion($qdata);

$expectedxml = '
 <question type="ddwtos">
 <name>
 <text>A drag-and-drop question</text>
 </name>
 <questiontext format="moodle_auto_format">
 <text>Put these in order: [[1]], [[2]], [[3]].</text>
 </questiontext>
 <generalfeedback format="moodle_auto_format">
 <text>The answer is Alpha, Beta, Gamma.</text>
 </generalfeedback>
 <defaultgrade>3</defaultgrade>
 <penalty>0.3333333</penalty>
 <hidden>0</hidden>
 <idnumber></idnumber>
 <shuffleanswers>1</shuffleanswers>
 <correctfeedback format="moodle_auto_format">
 <text><![CDATA[Your answer is correct.]]></text>
 </correctfeedback>
 <partiallycorrectfeedback format="moodle_auto_format">
 <text><![CDATA[Your answer is partially correct.]]></text>
 </partiallycorrectfeedback>
 <incorrectfeedback format="moodle_auto_format">
 <text><![CDATA[Your answer is incorrect.]]></text>
 </incorrectfeedback>
 <shownumcorrect/>
 <dragbox>
 <text>Alpha</text>
 <group>1</group>
 </dragbox>
 <dragbox>
 <text>Beta</text>
 <group>1</group>
 </dragbox>
 <dragbox>
 <text>Gamma</text>
 <group>1</group>
 <infinite/>
 </dragbox>
 <hint format="moodle_auto_format">
 <text>Try again.</text>
 <shownumcorrect/>
 </hint>
 <hint format="moodle_auto_format">
 <text>These are the first three letters of the Greek alphabet.</text>
 <shownumcorrect/>
 <clearwrong/>
 </hint>
 </question>
';

$this->assert_same_xml($expectedxml, $xml);
    }
}