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Differences Between: [Versions 310 and 311] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Unit tests for (some of) mod/book/lib.php.
  19   *
  20   * @package    mod_book
  21   * @category   phpunit
  22   * @copyright  2015 Juan Leyva <juan@moodle.com>
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  namespace mod_book;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  global $CFG;
  30  require_once($CFG->dirroot . '/mod/book/lib.php');
  31  
  32  /**
  33   * Unit tests for (some of) mod/book/lib.php.
  34   *
  35   * @package    mod_book
  36   * @category   phpunit
  37   * @copyright  2015 Juan Leyva <juan@moodle.com>
  38   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  39   */
  40  class lib_test extends \advanced_testcase {
  41  
  42      public function setUp(): void {
  43          $this->resetAfterTest();
  44          $this->setAdminUser();
  45      }
  46  
  47      public function test_export_contents() {
  48          global $DB, $CFG;
  49          require_once($CFG->dirroot . '/course/externallib.php');
  50  
  51          $user = $this->getDataGenerator()->create_user();
  52          $teacher = $this->getDataGenerator()->create_user();
  53          $course = $this->getDataGenerator()->create_course(array('enablecomment' => 1));
  54          $studentrole = $DB->get_record('role', array('shortname' => 'student'));
  55          $teacherrole = $DB->get_record('role', array('shortname' => 'teacher'));
  56  
  57          $this->getDataGenerator()->enrol_user($user->id, $course->id, $studentrole->id);
  58          $this->getDataGenerator()->enrol_user($teacher->id, $course->id, $teacherrole->id);
  59  
  60          // Test book with 3 chapters.
  61          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
  62          $cm = get_coursemodule_from_id('book', $book->cmid);
  63  
  64          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
  65          $chapter1 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 1,
  66              'tags' => array('Cats', 'Dogs')));
  67          $tag = \core_tag_tag::get_by_name(0, 'Cats');
  68  
  69          $chapter2 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 2));
  70          $subchapter = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 3, "subchapter" => 1));
  71          $chapter3 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 4, "hidden" => 1));
  72  
  73          $this->setUser($user);
  74  
  75          $contents = book_export_contents($cm, '');
  76          // The hidden chapter must not be included, and additional page with the structure must be included.
  77          $this->assertCount(4, $contents);
  78  
  79          $this->assertEquals('structure', $contents[0]['filename']);
  80          $this->assertEquals('index.html', $contents[1]['filename']);
  81          $this->assertEquals('Chapter 1', $contents[1]['content']);
  82          $this->assertCount(2, $contents[1]['tags']);
  83          $this->assertEquals('Cats', $contents[1]['tags'][0]['rawname']);
  84          $this->assertEquals($tag->id, $contents[1]['tags'][0]['id']);
  85          $this->assertEquals('Dogs', $contents[1]['tags'][1]['rawname']);
  86          $this->assertEquals('index.html', $contents[2]['filename']);
  87          $this->assertEquals('Chapter 2', $contents[2]['content']);
  88          $this->assertEquals('index.html', $contents[3]['filename']);
  89          $this->assertEquals('Chapter 3', $contents[3]['content']);
  90  
  91          // Now, test the function via the external API.
  92          $contents = \core_course_external::get_course_contents($course->id, array());
  93          $contents = \external_api::clean_returnvalue(\core_course_external::get_course_contents_returns(), $contents);
  94  
  95          $this->assertCount(4, $contents[0]['modules'][0]['contents']);
  96  
  97          $this->assertEquals('content', $contents[0]['modules'][0]['contents'][0]['type']);
  98          $this->assertEquals('structure', $contents[0]['modules'][0]['contents'][0]['filename']);
  99  
 100          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][1]['type']);
 101          $this->assertEquals('Chapter 1', $contents[0]['modules'][0]['contents'][1]['content']);
 102  
 103          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][2]['type']);
 104          $this->assertEquals('Chapter 2', $contents[0]['modules'][0]['contents'][2]['content']);
 105  
 106          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][3]['type']);
 107          $this->assertEquals('Chapter 3', $contents[0]['modules'][0]['contents'][3]['content']);
 108  
 109          $this->assertEquals('book', $contents[0]['modules'][0]['modname']);
 110          $this->assertEquals($cm->id, $contents[0]['modules'][0]['id']);
 111          $this->assertCount(2, $contents[0]['modules'][0]['contents'][1]['tags']);
 112          $this->assertEquals('Cats', $contents[0]['modules'][0]['contents'][1]['tags'][0]['rawname']);
 113          $this->assertEquals('Dogs', $contents[0]['modules'][0]['contents'][1]['tags'][1]['rawname']);
 114  
 115          // As a teacher.
 116          $this->setUser($teacher);
 117  
 118          $contents = book_export_contents($cm, '');
 119          // As a teacher, the hidden chapter must be included in the structure.
 120          $this->assertCount(5, $contents);
 121  
 122          $this->assertEquals('structure', $contents[0]['filename']);
 123          // Check structure is correct.
 124          $foundhiddenchapter = false;
 125          $chapters = json_decode($contents[0]['content']);
 126          foreach ($chapters as $chapter) {
 127              if ($chapter->title == 'Chapter 4' && $chapter->hidden == 1) {
 128                  $foundhiddenchapter = true;
 129              }
 130          }
 131          $this->assertTrue($foundhiddenchapter);
 132  
 133          $this->assertEquals('index.html', $contents[1]['filename']);
 134          $this->assertEquals('Chapter 1', $contents[1]['content']);
 135          $this->assertCount(2, $contents[1]['tags']);
 136          $this->assertEquals('Cats', $contents[1]['tags'][0]['rawname']);
 137          $this->assertEquals($tag->id, $contents[1]['tags'][0]['id']);
 138          $this->assertEquals('Dogs', $contents[1]['tags'][1]['rawname']);
 139          $this->assertEquals('index.html', $contents[2]['filename']);
 140          $this->assertEquals('Chapter 2', $contents[2]['content']);
 141          $this->assertEquals('index.html', $contents[3]['filename']);
 142          $this->assertEquals('Chapter 3', $contents[3]['content']);
 143          $this->assertEquals('index.html', $contents[4]['filename']);
 144          $this->assertEquals('Chapter 4', $contents[4]['content']);
 145  
 146          // Now, test the function via the external API.
 147          $contents = \core_course_external::get_course_contents($course->id, array());
 148          $contents = \external_api::clean_returnvalue(\core_course_external::get_course_contents_returns(), $contents);
 149  
 150          $this->assertCount(5, $contents[0]['modules'][0]['contents']);
 151  
 152          $this->assertEquals('content', $contents[0]['modules'][0]['contents'][0]['type']);
 153          $this->assertEquals('structure', $contents[0]['modules'][0]['contents'][0]['filename']);
 154          // Check structure is correct.
 155          $foundhiddenchapter = false;
 156          $chapters = json_decode($contents[0]['modules'][0]['contents'][0]['content']);
 157          foreach ($chapters as $chapter) {
 158              if ($chapter->title == 'Chapter 4' && $chapter->hidden == 1) {
 159                  $foundhiddenchapter = true;
 160              }
 161          }
 162          $this->assertTrue($foundhiddenchapter);
 163  
 164          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][1]['type']);
 165          $this->assertEquals('Chapter 1', $contents[0]['modules'][0]['contents'][1]['content']);
 166  
 167          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][2]['type']);
 168          $this->assertEquals('Chapter 2', $contents[0]['modules'][0]['contents'][2]['content']);
 169  
 170          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][3]['type']);
 171          $this->assertEquals('Chapter 3', $contents[0]['modules'][0]['contents'][3]['content']);
 172  
 173          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][4]['type']);
 174          $this->assertEquals('Chapter 4', $contents[0]['modules'][0]['contents'][4]['content']);
 175  
 176          $this->assertEquals('book', $contents[0]['modules'][0]['modname']);
 177          $this->assertEquals($cm->id, $contents[0]['modules'][0]['id']);
 178          $this->assertCount(2, $contents[0]['modules'][0]['contents'][1]['tags']);
 179          $this->assertEquals('Cats', $contents[0]['modules'][0]['contents'][1]['tags'][0]['rawname']);
 180          $this->assertEquals('Dogs', $contents[0]['modules'][0]['contents'][1]['tags'][1]['rawname']);
 181  
 182          // Test empty book.
 183          $emptybook = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 184          $cm = get_coursemodule_from_id('book', $emptybook->cmid);
 185          $contents = book_export_contents($cm, '');
 186  
 187          $this->assertCount(1, $contents);
 188          $this->assertEquals('structure', $contents[0]['filename']);
 189          $this->assertEquals(json_encode(array()), $contents[0]['content']);
 190  
 191      }
 192  
 193      /**
 194       * Test book_view
 195       * @return void
 196       */
 197      public function test_book_view() {
 198          global $CFG, $DB;
 199  
 200          $CFG->enablecompletion = 1;
 201  
 202          // Setup test data.
 203          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 204          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 205                                                              array('completion' => 2, 'completionview' => 1));
 206          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
 207          $chapter = $bookgenerator->create_chapter(array('bookid' => $book->id));
 208  
 209          $context = \context_module::instance($book->cmid);
 210          $cm = get_coursemodule_from_instance('book', $book->id);
 211  
 212          // Trigger and capture the event.
 213          $sink = $this->redirectEvents();
 214  
 215          // Check just opening the book.
 216          book_view($book, 0, false, $course, $cm, $context);
 217  
 218          $events = $sink->get_events();
 219          $this->assertCount(1, $events);
 220          $event = array_shift($events);
 221  
 222          // Checking that the event contains the expected values.
 223          $this->assertInstanceOf('\mod_book\event\course_module_viewed', $event);
 224          $this->assertEquals($context, $event->get_context());
 225          $moodleurl = new \moodle_url('/mod/book/view.php', array('id' => $cm->id));
 226          $this->assertEquals($moodleurl, $event->get_url());
 227          $this->assertEventContextNotUsed($event);
 228          $this->assertNotEmpty($event->get_name());
 229  
 230          // Check viewing one book chapter (the only one so it will be the first and last).
 231          book_view($book, $chapter, true, $course, $cm, $context);
 232  
 233          $events = $sink->get_events();
 234          // We expect a total of 4 events. One for module viewed, one for chapter viewed and two belonging to completion.
 235          $this->assertCount(4, $events);
 236  
 237          // Check completion status.
 238          $completion = new \completion_info($course);
 239          $completiondata = $completion->get_data($cm);
 240          $this->assertEquals(1, $completiondata->completionstate);
 241      }
 242  
 243      public function test_book_core_calendar_provide_event_action() {
 244          // Create the activity.
 245          $course = $this->getDataGenerator()->create_course();
 246          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 247  
 248          // Create a calendar event.
 249          $event = $this->create_action_event($course->id, $book->id,
 250              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 251  
 252          // Create an action factory.
 253          $factory = new \core_calendar\action_factory();
 254  
 255          // Decorate action event.
 256          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 257  
 258          // Confirm the event was decorated.
 259          $this->assertInstanceOf('\core_calendar\local\event\value_objects\action', $actionevent);
 260          $this->assertEquals(get_string('view'), $actionevent->get_name());
 261          $this->assertInstanceOf('moodle_url', $actionevent->get_url());
 262          $this->assertEquals(1, $actionevent->get_item_count());
 263          $this->assertTrue($actionevent->is_actionable());
 264      }
 265  
 266      public function test_book_core_calendar_provide_event_action_in_hidden_section() {
 267          // Create the activity.
 268          $course = $this->getDataGenerator()->create_course();
 269          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 270  
 271          // Enrol a student in the course.
 272          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 273  
 274          // Create a calendar event.
 275          $event = $this->create_action_event($course->id, $book->id,
 276                  \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 277  
 278          // Set sections 0 as hidden.
 279          set_section_visible($course->id, 0, 0);
 280  
 281          // Now, log out.
 282          $this->setUser();
 283  
 284          // Create an action factory.
 285          $factory = new \core_calendar\action_factory();
 286  
 287          // Decorate action event for the student.
 288          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 289  
 290          // Confirm the event is not shown at all.
 291          $this->assertNull($actionevent);
 292      }
 293  
 294      public function test_book_core_calendar_provide_event_action_for_user() {
 295          // Create the activity.
 296          $course = $this->getDataGenerator()->create_course();
 297          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 298  
 299          // Enrol a student in the course.
 300          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 301  
 302          // Create a calendar event.
 303          $event = $this->create_action_event($course->id, $book->id,
 304              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 305  
 306          // Now, log out.
 307          $this->setUser();
 308  
 309          // Create an action factory.
 310          $factory = new \core_calendar\action_factory();
 311  
 312          // Decorate action event for the student.
 313          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 314  
 315          // Confirm the event was decorated.
 316          $this->assertInstanceOf('\core_calendar\local\event\value_objects\action', $actionevent);
 317          $this->assertEquals(get_string('view'), $actionevent->get_name());
 318          $this->assertInstanceOf('moodle_url', $actionevent->get_url());
 319          $this->assertEquals(1, $actionevent->get_item_count());
 320          $this->assertTrue($actionevent->is_actionable());
 321      }
 322  
 323      public function test_book_core_calendar_provide_event_action_as_non_user() {
 324          global $CFG;
 325  
 326          // Create the activity.
 327          $course = $this->getDataGenerator()->create_course();
 328          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 329  
 330          // Create a calendar event.
 331          $event = $this->create_action_event($course->id, $book->id,
 332              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 333  
 334          // Log out the user and set force login to true.
 335          \core\session\manager::init_empty_session();
 336          $CFG->forcelogin = true;
 337  
 338          // Create an action factory.
 339          $factory = new \core_calendar\action_factory();
 340  
 341          // Decorate action event.
 342          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 343  
 344          // Ensure result was null.
 345          $this->assertNull($actionevent);
 346      }
 347  
 348      public function test_book_core_calendar_provide_event_action_already_completed() {
 349          global $CFG;
 350  
 351          $CFG->enablecompletion = 1;
 352  
 353          // Create the activity.
 354          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 355          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 356              array('completion' => 2, 'completionview' => 1, 'completionexpected' => time() + DAYSECS));
 357  
 358          // Get some additional data.
 359          $cm = get_coursemodule_from_instance('book', $book->id);
 360  
 361          // Create a calendar event.
 362          $event = $this->create_action_event($course->id, $book->id,
 363              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 364  
 365          // Mark the activity as completed.
 366          $completion = new \completion_info($course);
 367          $completion->set_module_viewed($cm);
 368  
 369          // Create an action factory.
 370          $factory = new \core_calendar\action_factory();
 371  
 372          // Decorate action event.
 373          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 374  
 375          // Ensure result was null.
 376          $this->assertNull($actionevent);
 377      }
 378  
 379      public function test_book_core_calendar_provide_event_action_already_completed_for_user() {
 380          global $CFG;
 381  
 382          $CFG->enablecompletion = 1;
 383  
 384          // Create the activity.
 385          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 386          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 387              array('completion' => 2, 'completionview' => 1, 'completionexpected' => time() + DAYSECS));
 388  
 389          // Enrol a student in the course.
 390          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 391  
 392          // Get some additional data.
 393          $cm = get_coursemodule_from_instance('book', $book->id);
 394  
 395          // Create a calendar event.
 396          $event = $this->create_action_event($course->id, $book->id,
 397              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 398  
 399          // Mark the activity as completed for the student.
 400          $completion = new \completion_info($course);
 401          $completion->set_module_viewed($cm, $student->id);
 402  
 403          // Create an action factory.
 404          $factory = new \core_calendar\action_factory();
 405  
 406          // Decorate action event for the student.
 407          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 408  
 409          // Ensure result was null.
 410          $this->assertNull($actionevent);
 411      }
 412  
 413      /**
 414       * Creates an action event.
 415       *
 416       * @param int $courseid The course id.
 417       * @param int $instanceid The instance id.
 418       * @param string $eventtype The event type.
 419       * @return bool|calendar_event
 420       */
 421      private function create_action_event($courseid, $instanceid, $eventtype) {
 422          $event = new \stdClass();
 423          $event->name = 'Calendar event';
 424          $event->modulename  = 'book';
 425          $event->courseid = $courseid;
 426          $event->instance = $instanceid;
 427          $event->type = CALENDAR_EVENT_TYPE_ACTION;
 428          $event->eventtype = $eventtype;
 429          $event->timestart = time();
 430  
 431          return \calendar_event::create($event);
 432      }
 433  
 434      public function test_mod_book_get_tagged_chapters() {
 435          global $DB;
 436  
 437          $this->resetAfterTest();
 438          $this->setAdminUser();
 439  
 440          // Setup test data.
 441          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
 442          $course3 = $this->getDataGenerator()->create_course();
 443          $course2 = $this->getDataGenerator()->create_course();
 444          $course1 = $this->getDataGenerator()->create_course();
 445          $book1 = $this->getDataGenerator()->create_module('book', array('course' => $course1->id));
 446          $book2 = $this->getDataGenerator()->create_module('book', array('course' => $course2->id));
 447          $book3 = $this->getDataGenerator()->create_module('book', array('course' => $course3->id));
 448          $chapter11 = $bookgenerator->create_content($book1, array('tags' => array('Cats', 'Dogs')));
 449          $chapter12 = $bookgenerator->create_content($book1, array('tags' => array('Cats', 'mice')));
 450          $chapter13 = $bookgenerator->create_content($book1, array('tags' => array('Cats')));
 451          $chapter14 = $bookgenerator->create_content($book1);
 452          $chapter15 = $bookgenerator->create_content($book1, array('tags' => array('Cats')));
 453          $chapter16 = $bookgenerator->create_content($book1, array('tags' => array('Cats'), 'hidden' => true));
 454          $chapter21 = $bookgenerator->create_content($book2, array('tags' => array('Cats')));
 455          $chapter22 = $bookgenerator->create_content($book2, array('tags' => array('Cats', 'Dogs')));
 456          $chapter23 = $bookgenerator->create_content($book2, array('tags' => array('mice', 'Cats')));
 457          $chapter31 = $bookgenerator->create_content($book3, array('tags' => array('mice', 'Cats')));
 458  
 459          $tag = \core_tag_tag::get_by_name(0, 'Cats');
 460  
 461          // Admin can see everything.
 462          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 463              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */0);
 464          $this->assertMatchesRegularExpression('/'.$chapter11->title.'</', $res->content);
 465          $this->assertMatchesRegularExpression('/'.$chapter12->title.'</', $res->content);
 466          $this->assertMatchesRegularExpression('/'.$chapter13->title.'</', $res->content);
 467          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'</', $res->content);
 468          $this->assertMatchesRegularExpression('/'.$chapter15->title.'</', $res->content);
 469          $this->assertMatchesRegularExpression('/'.$chapter16->title.'</', $res->content);
 470          $this->assertDoesNotMatchRegularExpression('/'.$chapter21->title.'</', $res->content);
 471          $this->assertDoesNotMatchRegularExpression('/'.$chapter22->title.'</', $res->content);
 472          $this->assertDoesNotMatchRegularExpression('/'.$chapter23->title.'</', $res->content);
 473          $this->assertDoesNotMatchRegularExpression('/'.$chapter31->title.'</', $res->content);
 474          $this->assertEmpty($res->prevpageurl);
 475          $this->assertNotEmpty($res->nextpageurl);
 476          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 477              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */1);
 478          $this->assertDoesNotMatchRegularExpression('/'.$chapter11->title.'</', $res->content);
 479          $this->assertDoesNotMatchRegularExpression('/'.$chapter12->title.'</', $res->content);
 480          $this->assertDoesNotMatchRegularExpression('/'.$chapter13->title.'</', $res->content);
 481          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'</', $res->content);
 482          $this->assertDoesNotMatchRegularExpression('/'.$chapter15->title.'</', $res->content);
 483          $this->assertDoesNotMatchRegularExpression('/'.$chapter16->title.'</', $res->content);
 484          $this->assertMatchesRegularExpression('/'.$chapter21->title.'</', $res->content);
 485          $this->assertMatchesRegularExpression('/'.$chapter22->title.'</', $res->content);
 486          $this->assertMatchesRegularExpression('/'.$chapter23->title.'</', $res->content);
 487          $this->assertMatchesRegularExpression('/'.$chapter31->title.'</', $res->content);
 488          $this->assertNotEmpty($res->prevpageurl);
 489          $this->assertEmpty($res->nextpageurl);
 490  
 491          // Create and enrol a user.
 492          $student = self::getDataGenerator()->create_user();
 493          $studentrole = $DB->get_record('role', array('shortname' => 'student'));
 494          $this->getDataGenerator()->enrol_user($student->id, $course1->id, $studentrole->id, 'manual');
 495          $this->getDataGenerator()->enrol_user($student->id, $course2->id, $studentrole->id, 'manual');
 496          $this->setUser($student);
 497          \core_tag_index_builder::reset_caches();
 498  
 499          // User can not see chapters in course 3 because he is not enrolled.
 500          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 501              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */1);
 502          $this->assertMatchesRegularExpression('/'.$chapter22->title.'/', $res->content);
 503          $this->assertMatchesRegularExpression('/'.$chapter23->title.'/', $res->content);
 504          $this->assertDoesNotMatchRegularExpression('/'.$chapter31->title.'/', $res->content);
 505  
 506          // User can search book chapters inside a course.
 507          $coursecontext = \context_course::instance($course1->id);
 508          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 509              /*$fromctx = */0, /*$ctx = */$coursecontext->id, /*$rec = */1, /*$chapter = */0);
 510          $this->assertMatchesRegularExpression('/'.$chapter11->title.'/', $res->content);
 511          $this->assertMatchesRegularExpression('/'.$chapter12->title.'/', $res->content);
 512          $this->assertMatchesRegularExpression('/'.$chapter13->title.'/', $res->content);
 513          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'/', $res->content);
 514          $this->assertMatchesRegularExpression('/'.$chapter15->title.'/', $res->content);
 515          $this->assertDoesNotMatchRegularExpression('/'.$chapter21->title.'/', $res->content);
 516          $this->assertDoesNotMatchRegularExpression('/'.$chapter22->title.'/', $res->content);
 517          $this->assertDoesNotMatchRegularExpression('/'.$chapter23->title.'/', $res->content);
 518          $this->assertEmpty($res->nextpageurl);
 519  
 520          // User cannot see hidden chapters.
 521          $this->assertDoesNotMatchRegularExpression('/'.$chapter16->title.'/', $res->content);
 522      }
 523  }