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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/>.

/**
 * Tests our html2text hacks
 *
 * Note: includes original tests from testweblib.php
 *
 * @package    core
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

class core_html2text_testcase extends basic_testcase {

/**
 * ALT as image replacements.
 */
 public function test_images() {
 $this->assertSame('[edit]', html_to_text('<img src="edit.png" alt="edit" />'));

$text = 'xx<img src="gif.gif" alt="some gif" />xx';
 $result = html_to_text($text, null, false, false);
 $this->assertSame($result, 'xx[some gif]xx');
 }

/**
 * No magic quotes messing.
 */
 public function test_no_strip_slashes() {
 $this->assertSame('[\edit]', html_to_text('<img src="edit.png" alt="\edit" />'));

$text = '\\magic\\quotes\\are\\\\horrible';
        $result = html_to_text($text, null, false, false);
        $this->assertSame($result, $text);
    }

/**
 * core_text integration.
 */
 public function test_core_text() {
 $text = 'Žluťoučký koníček';
 $result = html_to_text($text, null, false, false);
 $this->assertSame($result, 'ŽLUŤOUČKÝ KONÍČEK');
 }

/**
     * Protect 0.
     */
    public function test_zero() {
        $text = '0';
        $result = html_to_text($text, null, false, false);
        $this->assertSame($result, $text);

$this->assertSame('0', html_to_text('0'));
    }

/**
     * Test the links list enumeration.
     */
    public function test_build_link_list() {

// Note the trailing whitespace left intentionally in the text.
 $text = 'Total of <a title="List of integrated issues"
 href="http://tr.mdl.org/sh.jspa?r=1&j=p+%3D+%22I+d%22+%3D"> 
 27 issues</a> and <a href="http://another.url/?f=a&b=2">some</a> other
have been fixed <a href="http://third.url/view.php">last week</a>';

// Do not collect links.
        $result = html_to_text($text, 5000, false);
        $this->assertSame('Total of 27 ISSUES and some other have been fixed LAST WEEK', $result);

// Collect and enumerate links.
        $result = html_to_text($text, 5000, true);
        $this->assertSame(0, strpos($result, 'Total of 27 ISSUES [1] and some [2] other have been fixed LAST WEEK [3]'));
        $this->assertSame(false, strpos($result, '[0]'));
        $this->assertSame(1, preg_match('|^'.preg_quote('[1] http://tr.mdl.org/sh.jspa?r=1&j=p+%3D+%22I+d%22+%3D').'$|m', $result));
        $this->assertSame(1, preg_match('|^'.preg_quote('[2] http://another.url/?f=a&b=2').'$|m', $result));
        $this->assertSame(1, preg_match('|^'.preg_quote('[3] http://third.url/view.php').'$|m', $result));
        $this->assertSame(false, strpos($result, '[4]'));

// Test multiple occurrences of the same URL.
 $text = 'See <a href="http://moodle.org">moodle.org</a>,
 <a href="http://www.google.fr">google</a>, <a href="http://www.univ-lemans.fr">univ-lemans</a>
 and <a href="http://www.google.fr">google</a>.
 Also try <a href="https://www.google.fr">google via HTTPS</a>.';
 $result = html_to_text($text, 5000, true);
 $this->assertSame(0, strpos($result, 'See moodle.org [1], google [2], univ-lemans [3] and google [2]. Also try google via HTTPS [4].'));
 $this->assertSame(false, strpos($result, '[0]'));
 $this->assertSame(1, preg_match('|^'.preg_quote('[1] http://moodle.org').'$|m', $result));
 $this->assertSame(1, preg_match('|^'.preg_quote('[2] http://www.google.fr').'$|m', $result));
 $this->assertSame(1, preg_match('|^'.preg_quote('[3] http://www.univ-lemans.fr').'$|m', $result));
 $this->assertSame(1, preg_match('|^'.preg_quote('[4] https://www.google.fr').'$|m', $result));
 $this->assertSame(false, strpos($result, '[5]'));
 }

/**
     * Various invalid HTML typed by users that ignore html strict.
     **/
    public function test_invalid_html() {
        $text = 'Gin & Tonic';
        $result = html_to_text($text, null, false, false);
        $this->assertSame($result, $text);

$text = 'Gin > Tonic';
        $result = html_to_text($text, null, false, false);
        $this->assertSame($result, $text);

$text = 'Gin < Tonic';
 $result = html_to_text($text, null, false, false);
 $this->assertSame($result, $text);
 }

/**
 * Basic text formatting.
 */
 public function test_simple() {
 $this->assertSame("_Hello_ WORLD!\n", html_to_text('Hello world!'));
 $this->assertSame("All the WORLD’S a stage.\n\n-- William Shakespeare\n", html_to_text('All the world’s a stage.-- William Shakespeare'));
 $this->assertSame("HELLO WORLD!\n\n", html_to_text('<h1>Hello world!</h1>'));
 $this->assertSame("Hello\nworld!", html_to_text('Hello world!'));
 }

/**
     * Test line wrapping.
     */
    public function test_text_nowrap() {
        $long = "Here is a long string, more than 75 characters long, since by default html_to_text wraps text at 75 chars.";
        $wrapped = "Here is a long string, more than 75 characters long, since by default\nhtml_to_text wraps text at 75 chars.";
        $this->assertSame($long, html_to_text($long, 0));
        $this->assertSame($wrapped, html_to_text($long));
    }

/**
     * Whitespace removal.
     */
    public function test_trailing_whitespace() {
        $this->assertSame('With trailing whitespace and some more text', html_to_text("With trailing whitespace   \nand some   more text", 0));
    }

/**
 * PRE parsing.
 */
 public function test_html_to_text_pre_parsing_problem() {
 $strorig = 'Consider the following function: <pre>void FillMeUp(char* in_string) {'.
 ' int i = 0; while (in_string[i] != \'\0\') { in_string[i] = \'X\'; i++; } '.
 '}</pre>What would happen if a non-terminated string were input to this function? ';

// Note, the spaces in the <pre> section are Unicode NBSPs - they may not be displayed in your editor.
 $strconv = 'Consider the following function:

void FillMeUp(char* in_string) {
  int i = 0;
  while (in_string[i] != \'\0\') {
    in_string[i] = \'X\';
    i++;
  }
}
What would happen if a non-terminated string were input to this function?

$this->assertSame($strconv, html_to_text($strorig));
    }

/**
 * Scripts should be stripped.
 */
 public function test_strip_scripts() {
 $this->assertSame('Interesting text',
 html_to_text('Interesting <script type="text/javascript">var what_a_mess = "Yuck!";</script> text', 0));
 }
}