C:/xampp/htdocs/moodle/question/type/truefalse/simpletest/testwalkthrough.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/>.

defined('MOODLE_INTERNAL') || die();

require_once($CFG->dirroot . '/question/engine/simpletest/helpers.php');


class qtype_truefalse_walkthrough_test extends qbehaviour_walkthrough_test_base {
    public function test_false_right_does_not_show_feedback_when_not_answered() {

        // Create a true-false question with correct answer false.
        $tf = test_question_maker::make_question('truefalse', 'false');
        $this->start_attempt_at_question($tf, 'deferredfeedback', 1);

        // Check the initial state.
        $this->check_current_state(question_state::$todo);
        $this->check_current_mark(null);
        $this->check_current_output(
                $this->get_contains_question_text_expectation($tf),
                $this->get_does_not_contain_feedback_expectation(),
                new ContainsTagWithContents('h3',
                        get_string('questiontext', 'question')));
        $this->assertEqual(get_string('false', 'qtype_truefalse'),
                $this->quba->get_right_answer_summary($this->slot));
        $this->assertPattern('/' . preg_quote($tf->questiontext) . '/',
                $this->quba->get_question_summary($this->slot));
        $this->assertNull($this->quba->get_response_summary($this->slot));

        // Finish the attempt without answering.
        $this->quba->finish_all_questions();

        // Verify.
        $this->check_current_state(question_state::$gaveup);
        $this->check_current_mark(null);
        $this->check_current_output(
                $this->get_contains_tf_true_radio_expectation(false, false),
                $this->get_contains_tf_false_radio_expectation(false, false),

                // In particular, check that the false feedback is not displayed.
                new NoPatternExpectation('/' . preg_quote($tf->falsefeedback) . '/'));

    }
}