--- /dev/null
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Unit tests for (some of) mod/book/lib.php.
+ *
+ * @package mod_book
+ * @category phpunit
+ * @copyright 2015 Juan Leyva <juan@moodle.com>
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->dirroot . '/mod/book/lib.php');
+
+/**
+ * Unit tests for (some of) mod/book/lib.php.
+ *
+ * @package mod_book
+ * @category phpunit
+ * @copyright 2015 Juan Leyva <juan@moodle.com>
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class mod_book_lib_testcase extends advanced_testcase {
+
+ public function test_export_contents() {
+ global $DB;
+
+ $this->resetAfterTest(true);
+
+ $user = $this->getDataGenerator()->create_user();
+ $course = $this->getDataGenerator()->create_course(array('enablecomment' => 1));
+ $studentrole = $DB->get_record('role', array('shortname' => 'student'));
+ $this->getDataGenerator()->enrol_user($user->id, $course->id, $studentrole->id);
+
+ // Test book with 3 chapters.
+ $book = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
+ $cm = get_coursemodule_from_id('book', $book->cmid);
+
+ $bookgenerator = $this->getDataGenerator()->get_plugin_generator('mod_book');
+ $chapter1 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 1));
+ $chapter2 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 2));
+ $subchapter = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 3, "subchapter" => 1));
+ $chapter3 = $bookgenerator->create_chapter(array('bookid' => $book->id, "pagenum" => 4, "hidden" => 1));
+
+ $this->setUser($user);
+
+ $contents = book_export_contents($cm, '');
+ // The hidden chapter must not be included, and additional page with the structure must be included.
+ $this->assertCount(4, $contents);
+
+ $this->assertEquals('structure', $contents[0]['filename']);
+ $this->assertEquals('index.html', $contents[1]['filename']);
+ $this->assertEquals('Chapter 1', $contents[1]['content']);
+ $this->assertEquals('index.html', $contents[2]['filename']);
+ $this->assertEquals('Chapter 2', $contents[2]['content']);
+ $this->assertEquals('index.html', $contents[3]['filename']);
+ $this->assertEquals('Chapter 3', $contents[3]['content']);
+
+ // Test empty book.
+ $emptybook = $this->getDataGenerator()->create_module('book', array('course' => $course->id));
+ $cm = get_coursemodule_from_id('book', $emptybook->cmid);
+ $contents = book_export_contents($cm, '');
+
+ $this->assertCount(1, $contents);
+ $this->assertEquals('structure', $contents[0]['filename']);
+ $this->assertEquals(json_encode(array()), $contents[0]['content']);
+
+ }
+}