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408a41bd35
Tests to ensure that we're not allowing injection via invalid values of the Youtube start time and playlist parameters.
672 lines
25 KiB
PHP
672 lines
25 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Test classes for handling embedded media (audio/video).
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*
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* @package core_media
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* @category phpunit
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* @copyright 2012 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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require_once($CFG->libdir . '/medialib.php');
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/**
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* Test script for media embedding.
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*/
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class core_medialib_testcase extends advanced_testcase {
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/** @var array Files covered by test */
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public static $includecoverage = array('lib/medialib.php', 'lib/outputrenderers.php');
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/**
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* Pre-test setup. Preserves $CFG.
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*/
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public function setUp() {
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global $CFG;
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parent::setUp();
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// Reset $CFG and $SERVER.
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$this->resetAfterTest();
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// Consistent initial setup: all players disabled.
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$CFG->core_media_enable_html5video = false;
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$CFG->core_media_enable_html5audio = false;
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$CFG->core_media_enable_mp3 = false;
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$CFG->core_media_enable_flv = false;
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$CFG->core_media_enable_wmp = false;
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$CFG->core_media_enable_qt = false;
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$CFG->core_media_enable_rm = false;
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$CFG->core_media_enable_youtube = false;
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$CFG->core_media_enable_vimeo = false;
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$CFG->core_media_enable_swf = false;
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$_SERVER = array('HTTP_USER_AGENT' => '');
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$this->pretend_to_be_safari();
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}
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/**
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* Sets user agent to Safari.
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*/
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private function pretend_to_be_safari() {
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// Pretend to be using Safari browser (must support mp4 for tests to work).
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core_useragent::instance(true, 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_8; de-at) ' .
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'AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1');
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}
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/**
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* Sets user agent to Firefox.
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*/
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private function pretend_to_be_firefox() {
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// Pretend to be using Firefox browser (must support ogg for tests to work).
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core_useragent::instance(true, 'Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0');
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}
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/**
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* Test for the core_media_player is_enabled.
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*/
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public function test_is_enabled() {
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global $CFG;
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// Test enabled: unset, 0, 1.
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$test = new core_media_player_test;
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$this->assertFalse($test->is_enabled());
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$CFG->core_media_enable_test = 0;
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$this->assertFalse($test->is_enabled());
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$CFG->core_media_enable_test = 1;
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$this->assertTrue($test->is_enabled());
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}
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/**
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* Test for core_media::get_filename.
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*/
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public function test_get_filename() {
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$this->assertSame('frog.mp4', core_media::get_filename(new moodle_url(
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'/pluginfile.php/312/mod_page/content/7/frog.mp4')));
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// This should work even though slasharguments is true, because we want
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// it to support 'legacy' links if somebody toggles the option later.
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$this->assertSame('frog.mp4', core_media::get_filename(new moodle_url(
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'/pluginfile.php?file=/312/mod_page/content/7/frog.mp4')));
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}
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/**
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* Test for core_media::get_extension.
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*/
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public function test_get_extension() {
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$this->assertSame('mp4', core_media::get_extension(new moodle_url(
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'/pluginfile.php/312/mod_page/content/7/frog.mp4')));
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$this->assertSame('', core_media::get_extension(new moodle_url(
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'/pluginfile.php/312/mod_page/content/7/frog')));
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$this->assertSame('mp4', core_media::get_extension(new moodle_url(
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'/pluginfile.php?file=/312/mod_page/content/7/frog.mp4')));
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$this->assertSame('', core_media::get_extension(new moodle_url(
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'/pluginfile.php?file=/312/mod_page/content/7/frog')));
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}
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/**
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* Test for the core_media_player list_supported_urls.
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*/
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public function test_list_supported_urls() {
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global $CFG;
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$test = new core_media_player_test;
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// Some example URLs.
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$supported1 = new moodle_url('http://example.org/1.test');
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$supported2 = new moodle_url('http://example.org/2.TST');
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$unsupported = new moodle_url('http://example.org/2.jpg');
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// No URLs => none.
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$result = $test->list_supported_urls(array());
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$this->assertEquals(array(), $result);
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// One supported URL => same.
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$result = $test->list_supported_urls(array($supported1));
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$this->assertEquals(array($supported1), $result);
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// Two supported URLS => same.
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$result = $test->list_supported_urls(array($supported1, $supported2));
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$this->assertEquals(array($supported1, $supported2), $result);
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// One unsupported => none.
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$result = $test->list_supported_urls(array($unsupported));
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$this->assertEquals(array(), $result);
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// Two supported and one unsupported => same.
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$result = $test->list_supported_urls(array($supported2, $unsupported, $supported1));
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$this->assertEquals(array($supported2, $supported1), $result);
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}
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/**
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* Test for core_media_renderer get_players
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*/
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public function test_get_players() {
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global $CFG, $PAGE;
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// All players are initially disabled (except link, which you can't).
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertSame('link', $renderer->get_players_test());
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// A couple enabled, check the order.
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$CFG->core_media_enable_html5audio = true;
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$CFG->core_media_enable_mp3 = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertSame('mp3, html5audio, link', $renderer->get_players_test());
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}
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/**
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* Test for core_media_renderer can_embed_url
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*/
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public function test_can_embed_url() {
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global $CFG, $PAGE;
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// All players are initially disabled, so mp4 cannot be rendered.
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$url = new moodle_url('http://example.org/test.mp4');
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertFalse($renderer->can_embed_url($url));
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// Enable QT player.
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$CFG->core_media_enable_qt = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertTrue($renderer->can_embed_url($url));
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// QT + html5.
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$CFG->core_media_enable_html5video = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertTrue($renderer->can_embed_url($url));
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// Only html5.
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$CFG->core_media_enable_qt = false;
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertTrue($renderer->can_embed_url($url));
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// Only WMP.
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$CFG->core_media_enable_html5video = false;
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$CFG->core_media_enable_wmp = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$this->assertFalse($renderer->can_embed_url($url));
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}
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/**
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* Test for core_media_renderer embed_url.
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* Checks multiple format/fallback support.
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*/
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public function test_embed_url_fallbacks() {
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global $CFG, $PAGE;
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$url = new moodle_url('http://example.org/test.mp4');
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// All plugins disabled, NOLINK option.
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$renderer = new core_media_renderer_test($PAGE, '');
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$t = $renderer->embed_url($url, 0, 0, '',
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array(core_media::OPTION_NO_LINK => true));
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// Completely empty.
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$this->assertSame('', $t);
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// All plugins disabled but not NOLINK.
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$renderer = new core_media_renderer_test($PAGE, '');
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$t = $renderer->embed_url($url);
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$this->assert_contents(false, false, true, $t);
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// HTML5 plugin enabled.
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$CFG->core_media_enable_html5video = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$t = $renderer->embed_url($url);
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$this->assert_contents(false, true, true, $t);
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// QT plugin enabled as well.
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$CFG->core_media_enable_qt = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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$t = $renderer->embed_url($url);
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$this->assert_contents(true, true, true, $t);
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// Nolink turned off, plugins still enabled.
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$t = $renderer->embed_url($url, 0, 0, '',
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array(core_media::OPTION_NO_LINK => true));
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$this->assert_contents(true, true, false, $t);
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}
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/**
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* Checks the contents of the resulting HTML code to ensure it used the
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* correct embed method(s).
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*
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* @param bool $hasqt True if it should have QT embed code
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* @param bool $hashtml5 True if it should have HTML5 embed code
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* @param bool $haslink True if it should have a fallback link
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* @param string $text HTML content
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*/
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private function assert_contents($hasqt, $hashtml5, $haslink, $text) {
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// I tried to avoid making it specific to the exact details of the html
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// code, picking out only single key strings that would let it check
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// whether final code contains the right things.
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$qt = 'qtplugin.cab';
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$html5 = '</video>';
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$link = 'mediafallbacklink';
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if ($hasqt) {
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$this->assertContains($qt, $text);
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} else {
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$this->assertNotContains($qt, $text);
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}
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if ($hashtml5) {
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$this->assertContains($html5, $text);
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} else {
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$this->assertNotContains($html5, $text);
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}
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if ($haslink) {
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$this->assertContains($link, $text);
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} else {
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$this->assertNotContains($link, $text);
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}
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}
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/**
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* Test for core_media_renderer embed_url.
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* Check SWF works including the special option required to enable it
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*/
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public function test_embed_url_swf() {
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global $CFG, $PAGE;
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$CFG->core_media_enable_swf = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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// Without any options...
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$url = new moodle_url('http://example.org/test.swf');
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$t = $renderer->embed_url($url);
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$this->assertNotContains('</object>', $t);
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// ...and with the 'no it's safe, I checked it' option.
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$url = new moodle_url('http://example.org/test.swf');
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$t = $renderer->embed_url($url, '', 0, 0, array(core_media::OPTION_TRUSTED => true));
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$this->assertContains('</object>', $t);
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}
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/**
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* Test for core_media_renderer embed_url.
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* Exercises all the basic formats not covered elsewhere.
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*/
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public function test_embed_url_other_formats() {
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global $CFG, $PAGE;
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// Enable all players and get renderer.
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$CFG->core_media_enable_html5audio = true;
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$CFG->core_media_enable_mp3 = true;
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$CFG->core_media_enable_flv = true;
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$CFG->core_media_enable_wmp = true;
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$CFG->core_media_enable_rm = true;
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$CFG->core_media_enable_youtube = true;
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$CFG->core_media_enable_vimeo = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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// Check each format one at a time. This is a basic check to be sure
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// the HTML is included for files of the right type, not a test that
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// the HTML itself is correct.
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// Format: mp3.
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$url = new moodle_url('http://example.org/test.mp3');
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$t = $renderer->embed_url($url);
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$this->assertContains('core_media_mp3_', $t);
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// Format: flv.
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$url = new moodle_url('http://example.org/test.flv');
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$t = $renderer->embed_url($url);
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$this->assertContains('core_media_flv_', $t);
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// Format: wmp.
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$url = new moodle_url('http://example.org/test.avi');
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$t = $renderer->embed_url($url);
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$this->assertContains('6BF52A52-394A-11d3-B153-00C04F79FAA6', $t);
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// Format: rm.
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$url = new moodle_url('http://example.org/test.rm');
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$t = $renderer->embed_url($url);
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$this->assertContains('CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA', $t);
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// Format: youtube.
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$url = new moodle_url('http://www.youtube.com/watch?v=vyrwMmsufJc');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$url = new moodle_url('http://www.youtube.com/v/vyrwMmsufJc');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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// Format: youtube video within playlist.
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$url = new moodle_url('https://www.youtube.com/watch?v=dv2f_xfmbD8&index=4&list=PLxcO_MFWQBDcyn9xpbmx601YSDlDcTcr0');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$this->assertContains('list=PLxcO_MFWQBDcyn9xpbmx601YSDlDcTcr0', $t);
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// Format: youtube video with start time.
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$url = new moodle_url('https://www.youtube.com/watch?v=JNJMF1l3udM&t=1h11s');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$this->assertContains('start=3611', $t);
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// Format: youtube video within playlist with start time.
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$url = new moodle_url('https://www.youtube.com/watch?v=dv2f_xfmbD8&index=4&list=PLxcO_MFWQBDcyn9xpbmx601YSDlDcTcr0&t=1m5s');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$this->assertContains('list=PLxcO_MFWQBDcyn9xpbmx601YSDlDcTcr0', $t);
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$this->assertContains('start=65', $t);
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// Format: youtube video with invalid parameter values (injection attempts).
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$url = new moodle_url('https://www.youtube.com/watch?v=dv2f_xfmbD8&index=4&list=PLxcO_">');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$this->assertNotContains('list=PLxcO_', $t); // We shouldn't get a list param as input was invalid.
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$url = new moodle_url('https://www.youtube.com/watch?v=JNJMF1l3udM&t=">');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$this->assertNotContains('start=', $t); // We shouldn't get a start param as input was invalid.
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// Format: youtube playlist.
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$url = new moodle_url('http://www.youtube.com/view_play_list?p=PL6E18E2927047B662');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$url = new moodle_url('http://www.youtube.com/playlist?list=PL6E18E2927047B662');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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$url = new moodle_url('http://www.youtube.com/p/PL6E18E2927047B662');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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// Format: vimeo.
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$url = new moodle_url('http://vimeo.com/1176321');
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$t = $renderer->embed_url($url);
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$this->assertContains('</iframe>', $t);
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// Format: html5audio.
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$this->pretend_to_be_firefox();
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$url = new moodle_url('http://example.org/test.ogg');
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$t = $renderer->embed_url($url);
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$this->assertContains('</audio>', $t);
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}
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/**
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* Same as test_embed_url MP3 test, but for slash arguments.
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*/
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public function test_slash_arguments() {
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global $CFG, $PAGE;
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// Again we do not turn slasharguments actually on, because it has to
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// work regardless of the setting of that variable in case of handling
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// links created using previous setting.
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// Enable MP3 and get renderer.
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$CFG->core_media_enable_mp3 = true;
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$renderer = new core_media_renderer_test($PAGE, '');
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// Format: mp3.
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$url = new moodle_url('http://example.org/pluginfile.php?file=x/y/z/test.mp3');
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$t = $renderer->embed_url($url);
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$this->assertContains('core_media_mp3_', $t);
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}
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/**
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* Test for core_media_renderer embed_url.
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* Checks the EMBED_OR_BLANK option.
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*/
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public function test_embed_or_blank() {
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global $CFG, $PAGE;
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$CFG->core_media_enable_html5audio = true;
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$this->pretend_to_be_firefox();
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$renderer = new core_media_renderer_test($PAGE, '');
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$options = array(core_media::OPTION_FALLBACK_TO_BLANK => true);
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// Embed that does match something should still include the link too.
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$url = new moodle_url('http://example.org/test.ogg');
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$t = $renderer->embed_url($url, '', 0, 0, $options);
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$this->assertContains('</audio>', $t);
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$this->assertContains('mediafallbacklink', $t);
|
|
|
|
// Embed that doesn't match something should be totally blank.
|
|
$url = new moodle_url('http://example.org/test.mp4');
|
|
$t = $renderer->embed_url($url, '', 0, 0, $options);
|
|
$this->assertSame('', $t);
|
|
}
|
|
|
|
/**
|
|
* Test for core_media_renderer embed_url.
|
|
* Checks that size is passed through correctly to player objects and tests
|
|
* size support in html5video output.
|
|
*/
|
|
public function test_embed_url_size() {
|
|
global $CFG, $PAGE;
|
|
|
|
// Technically this could break in every format and they handle size
|
|
// in several different ways, but I'm too lazy to test it in every
|
|
// format, so let's just pick one to check the values get passed
|
|
// through.
|
|
$CFG->core_media_enable_html5video = true;
|
|
$renderer = new core_media_renderer_test($PAGE, '');
|
|
$url = new moodle_url('http://example.org/test.mp4');
|
|
|
|
// HTML5 default size - specifies core width and does not specify height.
|
|
$t = $renderer->embed_url($url);
|
|
$this->assertContains('width="' . CORE_MEDIA_VIDEO_WIDTH . '"', $t);
|
|
$this->assertNotContains('height', $t);
|
|
|
|
// HTML5 specified size - specifies both.
|
|
$t = $renderer->embed_url($url, '', '666', '101');
|
|
$this->assertContains('width="666"', $t);
|
|
$this->assertContains('height="101"', $t);
|
|
|
|
// HTML5 size specified in url, overrides call.
|
|
$url = new moodle_url('http://example.org/test.mp4?d=123x456');
|
|
$t = $renderer->embed_url($url, '', '666', '101');
|
|
$this->assertContains('width="123"', $t);
|
|
$this->assertContains('height="456"', $t);
|
|
}
|
|
|
|
/**
|
|
* Test for core_media_renderer embed_url.
|
|
* Checks that name is passed through correctly to player objects and tests
|
|
* name support in html5video output.
|
|
*/
|
|
public function test_embed_url_name() {
|
|
global $CFG, $PAGE;
|
|
|
|
// As for size this could break in every format but I'm only testing
|
|
// html5video.
|
|
$CFG->core_media_enable_html5video = true;
|
|
$renderer = new core_media_renderer_test($PAGE, '');
|
|
$url = new moodle_url('http://example.org/test.mp4');
|
|
|
|
// HTML5 default name - use filename.
|
|
$t = $renderer->embed_url($url);
|
|
$this->assertContains('title="test.mp4"', $t);
|
|
|
|
// HTML5 specified name - check escaping.
|
|
$t = $renderer->embed_url($url, 'frog & toad');
|
|
$this->assertContains('title="frog & toad"', $t);
|
|
}
|
|
|
|
/**
|
|
* Test for core_media_renderer split_alternatives.
|
|
*/
|
|
public function test_split_alternatives() {
|
|
// Single URL - identical moodle_url.
|
|
$mp4 = 'http://example.org/test.mp4';
|
|
$result = core_media::split_alternatives($mp4, $w, $h);
|
|
$this->assertEquals($mp4, $result[0]->out(false));
|
|
|
|
// Width and height weren't specified.
|
|
$this->assertEquals(0, $w);
|
|
$this->assertEquals(0, $h);
|
|
|
|
// Two URLs - identical moodle_urls.
|
|
$webm = 'http://example.org/test.webm';
|
|
$result = core_media::split_alternatives("$mp4#$webm", $w, $h);
|
|
$this->assertEquals($mp4, $result[0]->out(false));
|
|
$this->assertEquals($webm, $result[1]->out(false));
|
|
|
|
// Two URLs plus dimensions.
|
|
$size = 'd=400x280';
|
|
$result = core_media::split_alternatives("$mp4#$webm#$size", $w, $h);
|
|
$this->assertEquals($mp4, $result[0]->out(false));
|
|
$this->assertEquals($webm, $result[1]->out(false));
|
|
$this->assertEquals(400, $w);
|
|
$this->assertEquals(280, $h);
|
|
|
|
// Two URLs plus legacy dimensions (use last one).
|
|
$result = core_media::split_alternatives("$mp4?d=1x1#$webm?$size", $w, $h);
|
|
$this->assertEquals($mp4, $result[0]->out(false));
|
|
$this->assertEquals($webm, $result[1]->out(false));
|
|
$this->assertEquals(400, $w);
|
|
$this->assertEquals(280, $h);
|
|
}
|
|
|
|
/**
|
|
* Test for core_media_renderer embed_alternatives (with multiple urls)
|
|
*/
|
|
public function test_embed_alternatives() {
|
|
global $PAGE, $CFG;
|
|
|
|
// Most aspects of this are same as single player so let's just try
|
|
// a single typical / complicated scenario.
|
|
|
|
// MP3, WebM and FLV.
|
|
$urls = array(
|
|
new moodle_url('http://example.org/test.mp4'),
|
|
new moodle_url('http://example.org/test.webm'),
|
|
new moodle_url('http://example.org/test.flv'),
|
|
);
|
|
|
|
// Enable html5 and flv.
|
|
$CFG->core_media_enable_html5video = true;
|
|
$CFG->core_media_enable_flv = true;
|
|
$renderer = new core_media_renderer_test($PAGE, '');
|
|
|
|
// Result should contain HTML5 with two sources + FLV.
|
|
$t = $renderer->embed_alternatives($urls);
|
|
|
|
// HTML5 sources - mp4, not flv or webm (not supported in Safari).
|
|
$this->assertContains('<source src="http://example.org/test.mp4"', $t);
|
|
$this->assertNotContains('<source src="http://example.org/test.webm"', $t);
|
|
$this->assertNotContains('<source src="http://example.org/test.flv"', $t);
|
|
|
|
// FLV is before the video tag (indicating html5 is used as fallback to flv
|
|
// and not vice versa).
|
|
$this->assertTrue((bool)preg_match('~core_media_flv_.*<video~s', $t));
|
|
|
|
// Do same test with firefox and check we get the webm and not mp4.
|
|
$this->pretend_to_be_firefox();
|
|
$t = $renderer->embed_alternatives($urls);
|
|
|
|
// HTML5 sources - webm, not not flv or mp4 (not supported in Firefox).
|
|
$this->assertNotContains('<source src="http://example.org/test.mp4"', $t);
|
|
$this->assertContains('<source src="http://example.org/test.webm"', $t);
|
|
$this->assertNotContains('<source src="http://example.org/test.flv"', $t);
|
|
}
|
|
|
|
/**
|
|
* Converts moodle_url array into a single comma-separated string for
|
|
* easier testing.
|
|
*
|
|
* @param array $urls Array of moodle_urls
|
|
* @return string String containing those URLs, comma-separated
|
|
*/
|
|
public static function string_urls($urls) {
|
|
$out = array();
|
|
foreach ($urls as $url) {
|
|
$out[] = $url->out(false);
|
|
}
|
|
return implode(',', $out);
|
|
}
|
|
|
|
/**
|
|
* Converts associative array into a semicolon-separated string for easier
|
|
* testing.
|
|
*
|
|
* @param array $options Associative array
|
|
* @return string String of form 'a=b;c=d'
|
|
*/
|
|
public static function string_options($options) {
|
|
$out = '';
|
|
foreach ($options as $key => $value) {
|
|
if ($out) {
|
|
$out .= ';';
|
|
}
|
|
$out .= "$key=$value";
|
|
}
|
|
return $out;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Media player stub for testing purposes.
|
|
*/
|
|
class core_media_player_test extends core_media_player {
|
|
/** @var array Array of supported extensions */
|
|
public $ext;
|
|
/** @var int Player rank */
|
|
public $rank;
|
|
/** @var int Arbitrary number */
|
|
public $num;
|
|
|
|
/**
|
|
* @param int $num Number (used in output)
|
|
* @param int $rank Player rank
|
|
* @param array $ext Array of supported extensions
|
|
*/
|
|
public function __construct($num = 1, $rank = 13, $ext = array('tst', 'test')) {
|
|
$this->ext = $ext;
|
|
$this->rank = $rank;
|
|
$this->num = $num;
|
|
}
|
|
|
|
public function embed($urls, $name, $width, $height, $options) {
|
|
return $this->num . ':' . medialib_test::string_urls($urls) .
|
|
",$name,$width,$height,<!--FALLBACK-->," . medialib_test::string_options($options);
|
|
}
|
|
|
|
public function get_supported_extensions() {
|
|
return $this->ext;
|
|
}
|
|
|
|
public function get_rank() {
|
|
return $this->rank;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Media renderer override for testing purposes.
|
|
*/
|
|
class core_media_renderer_test extends core_media_renderer {
|
|
/**
|
|
* Access list of players as string, shortening it by getting rid of
|
|
* repeated text.
|
|
* @return string Comma-separated list of players
|
|
*/
|
|
public function get_players_test() {
|
|
$players = $this->get_players();
|
|
$out = '';
|
|
foreach ($players as $player) {
|
|
if ($out) {
|
|
$out .= ', ';
|
|
}
|
|
$out .= str_replace('core_media_player_', '', get_class($player));
|
|
}
|
|
return $out;
|
|
}
|
|
}
|