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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402] [Versions 400 and 402] [Versions 401 and 402]

   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  use core_external\external_api;
  28  
  29  defined('MOODLE_INTERNAL') || die();
  30  
  31  global $CFG;
  32  require_once($CFG->dirroot . '/mod/book/lib.php');
  33  
  34  /**
  35   * Unit tests for (some of) mod/book/lib.php.
  36   *
  37   * @package    mod_book
  38   * @category   phpunit
  39   * @copyright  2015 Juan Leyva <juan@moodle.com>
  40   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  41   */
  42  class lib_test extends \advanced_testcase {
  43  
  44      public function setUp(): void {
  45          $this->resetAfterTest();
  46          $this->setAdminUser();
  47      }
  48  
  49      public function test_export_contents() {
  50          global $DB, $CFG;
  51          require_once($CFG->dirroot . '/course/externallib.php');
  52  
  53          $user = $this->getDataGenerator()->create_user();
  54          $teacher = $this->getDataGenerator()->create_user();
  55          $course = $this->getDataGenerator()->create_course(array('enablecomment' => 1));
  56          $studentrole = $DB->get_record('role', array('shortname' => 'student'));
  57          $teacherrole = $DB->get_record('role', array('shortname' => 'teacher'));
  58  
  59          $this->getDataGenerator()->enrol_user($user->id, $course->id, $studentrole->id);
  60          $this->getDataGenerator()->enrol_user($teacher->id, $course->id, $teacherrole->id);
  61  
  62          // Test book with 3 chapters.
  63          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
  64          $cm = get_coursemodule_from_id('book', $book->cmid);
  65  
  66          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
  67          $chapter1 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 1,
  68              'tags' => array('Cats', 'Dogs')));
  69          $tag = \core_tag_tag::get_by_name(0, 'Cats');
  70  
  71          $chapter2 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 2));
  72          $subchapter = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 3, "subchapter" => 1));
  73          $chapter3 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 4, "hidden" => 1));
  74  
  75          $this->setUser($user);
  76  
  77          $contents = book_export_contents($cm, '');
  78          // The hidden chapter must not be included, and additional page with the structure must be included.
  79          $this->assertCount(4, $contents);
  80  
  81          $this->assertEquals('structure', $contents[0]['filename']);
  82          $this->assertEquals('index.html', $contents[1]['filename']);
  83          $this->assertEquals('Chapter 1', $contents[1]['content']);
  84          $this->assertCount(2, $contents[1]['tags']);
  85          $this->assertEquals('Cats', $contents[1]['tags'][0]['rawname']);
  86          $this->assertEquals($tag->id, $contents[1]['tags'][0]['id']);
  87          $this->assertEquals('Dogs', $contents[1]['tags'][1]['rawname']);
  88          $this->assertEquals('index.html', $contents[2]['filename']);
  89          $this->assertEquals('Chapter 2', $contents[2]['content']);
  90          $this->assertEquals('index.html', $contents[3]['filename']);
  91          $this->assertEquals('Chapter 3', $contents[3]['content']);
  92  
  93          // Now, test the function via the external API.
  94          $contents = \core_course_external::get_course_contents($course->id, array());
  95          $contents = external_api::clean_returnvalue(\core_course_external::get_course_contents_returns(), $contents);
  96  
  97          $this->assertCount(4, $contents[0]['modules'][0]['contents']);
  98  
  99          $this->assertEquals('content', $contents[0]['modules'][0]['contents'][0]['type']);
 100          $this->assertEquals('structure', $contents[0]['modules'][0]['contents'][0]['filename']);
 101  
 102          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][1]['type']);
 103          $this->assertEquals('Chapter 1', $contents[0]['modules'][0]['contents'][1]['content']);
 104  
 105          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][2]['type']);
 106          $this->assertEquals('Chapter 2', $contents[0]['modules'][0]['contents'][2]['content']);
 107  
 108          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][3]['type']);
 109          $this->assertEquals('Chapter 3', $contents[0]['modules'][0]['contents'][3]['content']);
 110  
 111          $this->assertEquals('book', $contents[0]['modules'][0]['modname']);
 112          $this->assertEquals($cm->id, $contents[0]['modules'][0]['id']);
 113          $this->assertCount(2, $contents[0]['modules'][0]['contents'][1]['tags']);
 114          $this->assertEquals('Cats', $contents[0]['modules'][0]['contents'][1]['tags'][0]['rawname']);
 115          $this->assertEquals('Dogs', $contents[0]['modules'][0]['contents'][1]['tags'][1]['rawname']);
 116  
 117          // As a teacher.
 118          $this->setUser($teacher);
 119  
 120          $contents = book_export_contents($cm, '');
 121          // As a teacher, the hidden chapter must be included in the structure.
 122          $this->assertCount(5, $contents);
 123  
 124          $this->assertEquals('structure', $contents[0]['filename']);
 125          // Check structure is correct.
 126          $foundhiddenchapter = false;
 127          $chapters = json_decode($contents[0]['content']);
 128          foreach ($chapters as $chapter) {
 129              if ($chapter->title == 'Chapter 4' && $chapter->hidden == 1) {
 130                  $foundhiddenchapter = true;
 131              }
 132          }
 133          $this->assertTrue($foundhiddenchapter);
 134  
 135          $this->assertEquals('index.html', $contents[1]['filename']);
 136          $this->assertEquals('Chapter 1', $contents[1]['content']);
 137          $this->assertCount(2, $contents[1]['tags']);
 138          $this->assertEquals('Cats', $contents[1]['tags'][0]['rawname']);
 139          $this->assertEquals($tag->id, $contents[1]['tags'][0]['id']);
 140          $this->assertEquals('Dogs', $contents[1]['tags'][1]['rawname']);
 141          $this->assertEquals('index.html', $contents[2]['filename']);
 142          $this->assertEquals('Chapter 2', $contents[2]['content']);
 143          $this->assertEquals('index.html', $contents[3]['filename']);
 144          $this->assertEquals('Chapter 3', $contents[3]['content']);
 145          $this->assertEquals('index.html', $contents[4]['filename']);
 146          $this->assertEquals('Chapter 4', $contents[4]['content']);
 147  
 148          // Now, test the function via the external API.
 149          $contents = \core_course_external::get_course_contents($course->id, array());
 150          $contents = external_api::clean_returnvalue(\core_course_external::get_course_contents_returns(), $contents);
 151  
 152          $this->assertCount(5, $contents[0]['modules'][0]['contents']);
 153  
 154          $this->assertEquals('content', $contents[0]['modules'][0]['contents'][0]['type']);
 155          $this->assertEquals('structure', $contents[0]['modules'][0]['contents'][0]['filename']);
 156          // Check structure is correct.
 157          $foundhiddenchapter = false;
 158          $chapters = json_decode($contents[0]['modules'][0]['contents'][0]['content']);
 159          foreach ($chapters as $chapter) {
 160              if ($chapter->title == 'Chapter 4' && $chapter->hidden == 1) {
 161                  $foundhiddenchapter = true;
 162              }
 163          }
 164          $this->assertTrue($foundhiddenchapter);
 165  
 166          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][1]['type']);
 167          $this->assertEquals('Chapter 1', $contents[0]['modules'][0]['contents'][1]['content']);
 168  
 169          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][2]['type']);
 170          $this->assertEquals('Chapter 2', $contents[0]['modules'][0]['contents'][2]['content']);
 171  
 172          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][3]['type']);
 173          $this->assertEquals('Chapter 3', $contents[0]['modules'][0]['contents'][3]['content']);
 174  
 175          $this->assertEquals('file', $contents[0]['modules'][0]['contents'][4]['type']);
 176          $this->assertEquals('Chapter 4', $contents[0]['modules'][0]['contents'][4]['content']);
 177  
 178          $this->assertEquals('book', $contents[0]['modules'][0]['modname']);
 179          $this->assertEquals($cm->id, $contents[0]['modules'][0]['id']);
 180          $this->assertCount(2, $contents[0]['modules'][0]['contents'][1]['tags']);
 181          $this->assertEquals('Cats', $contents[0]['modules'][0]['contents'][1]['tags'][0]['rawname']);
 182          $this->assertEquals('Dogs', $contents[0]['modules'][0]['contents'][1]['tags'][1]['rawname']);
 183  
 184          // Test empty book.
 185          $emptybook = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 186          $cm = get_coursemodule_from_id('book', $emptybook->cmid);
 187          $contents = book_export_contents($cm, '');
 188  
 189          $this->assertCount(1, $contents);
 190          $this->assertEquals('structure', $contents[0]['filename']);
 191          $this->assertEquals(json_encode(array()), $contents[0]['content']);
 192  
 193      }
 194  
 195      /**
 196       * Test book_view
 197       * @return void
 198       */
 199      public function test_book_view() {
 200          global $CFG, $DB;
 201  
 202          $CFG->enablecompletion = 1;
 203  
 204          // Setup test data.
 205          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 206          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 207                                                              array('completion' => 2, 'completionview' => 1));
 208          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
 209          $chapter = $bookgenerator->create_chapter(array('bookid' => $book->id));
 210  
 211          $context = \context_module::instance($book->cmid);
 212          $cm = get_coursemodule_from_instance('book', $book->id);
 213  
 214          // Trigger and capture the event.
 215          $sink = $this->redirectEvents();
 216  
 217          // Check just opening the book.
 218          book_view($book, 0, false, $course, $cm, $context);
 219  
 220          $events = $sink->get_events();
 221          $this->assertCount(1, $events);
 222          $event = array_shift($events);
 223  
 224          // Checking that the event contains the expected values.
 225          $this->assertInstanceOf('\mod_book\event\course_module_viewed', $event);
 226          $this->assertEquals($context, $event->get_context());
 227          $moodleurl = new \moodle_url('/mod/book/view.php', array('id' => $cm->id));
 228          $this->assertEquals($moodleurl, $event->get_url());
 229          $this->assertEventContextNotUsed($event);
 230          $this->assertNotEmpty($event->get_name());
 231  
 232          // Check viewing one book chapter (the only one so it will be the first and last).
 233          book_view($book, $chapter, true, $course, $cm, $context);
 234  
 235          $events = $sink->get_events();
 236          // We expect a total of 4 events. One for module viewed, one for chapter viewed and two belonging to completion.
 237          $this->assertCount(4, $events);
 238  
 239          // Check completion status.
 240          $completion = new \completion_info($course);
 241          $completiondata = $completion->get_data($cm);
 242          $this->assertEquals(1, $completiondata->completionstate);
 243      }
 244  
 245      public function test_book_core_calendar_provide_event_action() {
 246          // Create the activity.
 247          $course = $this->getDataGenerator()->create_course();
 248          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 249  
 250          // Create a calendar event.
 251          $event = $this->create_action_event($course->id, $book->id,
 252              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 253  
 254          // Create an action factory.
 255          $factory = new \core_calendar\action_factory();
 256  
 257          // Decorate action event.
 258          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 259  
 260          // Confirm the event was decorated.
 261          $this->assertInstanceOf('\core_calendar\local\event\value_objects\action', $actionevent);
 262          $this->assertEquals(get_string('view'), $actionevent->get_name());
 263          $this->assertInstanceOf('moodle_url', $actionevent->get_url());
 264          $this->assertEquals(1, $actionevent->get_item_count());
 265          $this->assertTrue($actionevent->is_actionable());
 266      }
 267  
 268      public function test_book_core_calendar_provide_event_action_in_hidden_section() {
 269          // Create the activity.
 270          $course = $this->getDataGenerator()->create_course();
 271          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 272  
 273          // Enrol a student in the course.
 274          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 275  
 276          // Create a calendar event.
 277          $event = $this->create_action_event($course->id, $book->id,
 278                  \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 279  
 280          // Set sections 0 as hidden.
 281          set_section_visible($course->id, 0, 0);
 282  
 283          // Now, log out.
 284          $this->setUser();
 285  
 286          // Create an action factory.
 287          $factory = new \core_calendar\action_factory();
 288  
 289          // Decorate action event for the student.
 290          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 291  
 292          // Confirm the event is not shown at all.
 293          $this->assertNull($actionevent);
 294      }
 295  
 296      public function test_book_core_calendar_provide_event_action_for_user() {
 297          // Create the activity.
 298          $course = $this->getDataGenerator()->create_course();
 299          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 300  
 301          // Enrol a student in the course.
 302          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 303  
 304          // Create a calendar event.
 305          $event = $this->create_action_event($course->id, $book->id,
 306              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 307  
 308          // Now, log out.
 309          $this->setUser();
 310  
 311          // Create an action factory.
 312          $factory = new \core_calendar\action_factory();
 313  
 314          // Decorate action event for the student.
 315          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 316  
 317          // Confirm the event was decorated.
 318          $this->assertInstanceOf('\core_calendar\local\event\value_objects\action', $actionevent);
 319          $this->assertEquals(get_string('view'), $actionevent->get_name());
 320          $this->assertInstanceOf('moodle_url', $actionevent->get_url());
 321          $this->assertEquals(1, $actionevent->get_item_count());
 322          $this->assertTrue($actionevent->is_actionable());
 323      }
 324  
 325      public function test_book_core_calendar_provide_event_action_as_non_user() {
 326          global $CFG;
 327  
 328          // Create the activity.
 329          $course = $this->getDataGenerator()->create_course();
 330          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
 331  
 332          // Create a calendar event.
 333          $event = $this->create_action_event($course->id, $book->id,
 334              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 335  
 336          // Log out the user and set force login to true.
 337          \core\session\manager::init_empty_session();
 338          $CFG->forcelogin = true;
 339  
 340          // Create an action factory.
 341          $factory = new \core_calendar\action_factory();
 342  
 343          // Decorate action event.
 344          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 345  
 346          // Ensure result was null.
 347          $this->assertNull($actionevent);
 348      }
 349  
 350      public function test_book_core_calendar_provide_event_action_already_completed() {
 351          global $CFG;
 352  
 353          $CFG->enablecompletion = 1;
 354  
 355          // Create the activity.
 356          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 357          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 358              array('completion' => 2, 'completionview' => 1, 'completionexpected' => time() + DAYSECS));
 359  
 360          // Get some additional data.
 361          $cm = get_coursemodule_from_instance('book', $book->id);
 362  
 363          // Create a calendar event.
 364          $event = $this->create_action_event($course->id, $book->id,
 365              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 366  
 367          // Mark the activity as completed.
 368          $completion = new \completion_info($course);
 369          $completion->set_module_viewed($cm);
 370  
 371          // Create an action factory.
 372          $factory = new \core_calendar\action_factory();
 373  
 374          // Decorate action event.
 375          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory);
 376  
 377          // Ensure result was null.
 378          $this->assertNull($actionevent);
 379      }
 380  
 381      public function test_book_core_calendar_provide_event_action_already_completed_for_user() {
 382          global $CFG;
 383  
 384          $CFG->enablecompletion = 1;
 385  
 386          // Create the activity.
 387          $course = $this->getDataGenerator()->create_course(array('enablecompletion' => 1));
 388          $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id),
 389              array('completion' => 2, 'completionview' => 1, 'completionexpected' => time() + DAYSECS));
 390  
 391          // Enrol a student in the course.
 392          $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
 393  
 394          // Get some additional data.
 395          $cm = get_coursemodule_from_instance('book', $book->id);
 396  
 397          // Create a calendar event.
 398          $event = $this->create_action_event($course->id, $book->id,
 399              \core_completion\api::COMPLETION_EVENT_TYPE_DATE_COMPLETION_EXPECTED);
 400  
 401          // Mark the activity as completed for the student.
 402          $completion = new \completion_info($course);
 403          $completion->set_module_viewed($cm, $student->id);
 404  
 405          // Create an action factory.
 406          $factory = new \core_calendar\action_factory();
 407  
 408          // Decorate action event for the student.
 409          $actionevent = mod_book_core_calendar_provide_event_action($event, $factory, $student->id);
 410  
 411          // Ensure result was null.
 412          $this->assertNull($actionevent);
 413      }
 414  
 415      /**
 416       * Creates an action event.
 417       *
 418       * @param int $courseid The course id.
 419       * @param int $instanceid The instance id.
 420       * @param string $eventtype The event type.
 421       * @return bool|calendar_event
 422       */
 423      private function create_action_event($courseid, $instanceid, $eventtype) {
 424          $event = new \stdClass();
 425          $event->name = 'Calendar event';
 426          $event->modulename  = 'book';
 427          $event->courseid = $courseid;
 428          $event->instance = $instanceid;
 429          $event->type = CALENDAR_EVENT_TYPE_ACTION;
 430          $event->eventtype = $eventtype;
 431          $event->timestart = time();
 432  
 433          return \calendar_event::create($event);
 434      }
 435  
 436      public function test_mod_book_get_tagged_chapters() {
 437          global $DB;
 438  
 439          $this->resetAfterTest();
 440          $this->setAdminUser();
 441  
 442          // Setup test data.
 443          $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
 444          $course3 = $this->getDataGenerator()->create_course();
 445          $course2 = $this->getDataGenerator()->create_course();
 446          $course1 = $this->getDataGenerator()->create_course();
 447          $book1 = $this->getDataGenerator()->create_module('book', array('course' => $course1->id));
 448          $book2 = $this->getDataGenerator()->create_module('book', array('course' => $course2->id));
 449          $book3 = $this->getDataGenerator()->create_module('book', array('course' => $course3->id));
 450          $chapter11 = $bookgenerator->create_content($book1, array('tags' => array('Cats', 'Dogs')));
 451          $chapter12 = $bookgenerator->create_content($book1, array('tags' => array('Cats', 'mice')));
 452          $chapter13 = $bookgenerator->create_content($book1, array('tags' => array('Cats')));
 453          $chapter14 = $bookgenerator->create_content($book1);
 454          $chapter15 = $bookgenerator->create_content($book1, array('tags' => array('Cats')));
 455          $chapter16 = $bookgenerator->create_content($book1, array('tags' => array('Cats'), 'hidden' => true));
 456          $chapter21 = $bookgenerator->create_content($book2, array('tags' => array('Cats')));
 457          $chapter22 = $bookgenerator->create_content($book2, array('tags' => array('Cats', 'Dogs')));
 458          $chapter23 = $bookgenerator->create_content($book2, array('tags' => array('mice', 'Cats')));
 459          $chapter31 = $bookgenerator->create_content($book3, array('tags' => array('mice', 'Cats')));
 460  
 461          $tag = \core_tag_tag::get_by_name(0, 'Cats');
 462  
 463          // Admin can see everything.
 464          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 465              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */0);
 466          $this->assertMatchesRegularExpression('/'.$chapter11->title.'</', $res->content);
 467          $this->assertMatchesRegularExpression('/'.$chapter12->title.'</', $res->content);
 468          $this->assertMatchesRegularExpression('/'.$chapter13->title.'</', $res->content);
 469          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'</', $res->content);
 470          $this->assertMatchesRegularExpression('/'.$chapter15->title.'</', $res->content);
 471          $this->assertMatchesRegularExpression('/'.$chapter16->title.'</', $res->content);
 472          $this->assertDoesNotMatchRegularExpression('/'.$chapter21->title.'</', $res->content);
 473          $this->assertDoesNotMatchRegularExpression('/'.$chapter22->title.'</', $res->content);
 474          $this->assertDoesNotMatchRegularExpression('/'.$chapter23->title.'</', $res->content);
 475          $this->assertDoesNotMatchRegularExpression('/'.$chapter31->title.'</', $res->content);
 476          $this->assertEmpty($res->prevpageurl);
 477          $this->assertNotEmpty($res->nextpageurl);
 478          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 479              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */1);
 480          $this->assertDoesNotMatchRegularExpression('/'.$chapter11->title.'</', $res->content);
 481          $this->assertDoesNotMatchRegularExpression('/'.$chapter12->title.'</', $res->content);
 482          $this->assertDoesNotMatchRegularExpression('/'.$chapter13->title.'</', $res->content);
 483          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'</', $res->content);
 484          $this->assertDoesNotMatchRegularExpression('/'.$chapter15->title.'</', $res->content);
 485          $this->assertDoesNotMatchRegularExpression('/'.$chapter16->title.'</', $res->content);
 486          $this->assertMatchesRegularExpression('/'.$chapter21->title.'</', $res->content);
 487          $this->assertMatchesRegularExpression('/'.$chapter22->title.'</', $res->content);
 488          $this->assertMatchesRegularExpression('/'.$chapter23->title.'</', $res->content);
 489          $this->assertMatchesRegularExpression('/'.$chapter31->title.'</', $res->content);
 490          $this->assertNotEmpty($res->prevpageurl);
 491          $this->assertEmpty($res->nextpageurl);
 492  
 493          // Create and enrol a user.
 494          $student = self::getDataGenerator()->create_user();
 495          $studentrole = $DB->get_record('role', array('shortname' => 'student'));
 496          $this->getDataGenerator()->enrol_user($student->id, $course1->id, $studentrole->id, 'manual');
 497          $this->getDataGenerator()->enrol_user($student->id, $course2->id, $studentrole->id, 'manual');
 498          $this->setUser($student);
 499          \core_tag_index_builder::reset_caches();
 500  
 501          // User can not see chapters in course 3 because he is not enrolled.
 502          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 503              /*$fromctx = */0, /*$ctx = */0, /*$rec = */1, /*$chapter = */1);
 504          $this->assertMatchesRegularExpression('/'.$chapter22->title.'/', $res->content);
 505          $this->assertMatchesRegularExpression('/'.$chapter23->title.'/', $res->content);
 506          $this->assertDoesNotMatchRegularExpression('/'.$chapter31->title.'/', $res->content);
 507  
 508          // User can search book chapters inside a course.
 509          $coursecontext = \context_course::instance($course1->id);
 510          $res = mod_book_get_tagged_chapters($tag, /*$exclusivemode = */false,
 511              /*$fromctx = */0, /*$ctx = */$coursecontext->id, /*$rec = */1, /*$chapter = */0);
 512          $this->assertMatchesRegularExpression('/'.$chapter11->title.'/', $res->content);
 513          $this->assertMatchesRegularExpression('/'.$chapter12->title.'/', $res->content);
 514          $this->assertMatchesRegularExpression('/'.$chapter13->title.'/', $res->content);
 515          $this->assertDoesNotMatchRegularExpression('/'.$chapter14->title.'/', $res->content);
 516          $this->assertMatchesRegularExpression('/'.$chapter15->title.'/', $res->content);
 517          $this->assertDoesNotMatchRegularExpression('/'.$chapter21->title.'/', $res->content);
 518          $this->assertDoesNotMatchRegularExpression('/'.$chapter22->title.'/', $res->content);
 519          $this->assertDoesNotMatchRegularExpression('/'.$chapter23->title.'/', $res->content);
 520          $this->assertEmpty($res->nextpageurl);
 521  
 522          // User cannot see hidden chapters.
 523          $this->assertDoesNotMatchRegularExpression('/'.$chapter16->title.'/', $res->content);
 524      }
 525  }