diff --git a/mod/lesson/tests/generator/lib.php b/mod/lesson/tests/generator/lib.php
new file mode 100644
index 00000000000..4ad19499b08
--- /dev/null
+++ b/mod/lesson/tests/generator/lib.php
@@ -0,0 +1,117 @@
+<?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/>.
+
+/**
+ * mod_lesson data generator.
+ *
+ * @package    mod_lesson
+ * @category   test
+ * @copyright  2013 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * mod_lesson data generator class.
+ *
+ * @package    mod_lesson
+ * @category   test
+ * @copyright  2013 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class mod_lesson_generator extends testing_module_generator {
+
+    /**
+     * @var int keep track of how many pages have been created.
+     */
+    protected $pagecount = 0;
+
+    /**
+     * To be called from data reset code only,
+     * do not use in tests.
+     * @return void
+     */
+    public function reset() {
+        $this->pagecount = 0;
+        parent::reset();
+    }
+
+    public function create_instance($record = null, array $options = null) {
+        global $CFG;
+
+        // Add default values for lesson.
+        $record = (array)$record + array(
+            'progressbar' => 0,
+            'ongoing' => 0,
+            'displayleft' => 0,
+            'displayleftif' => 0,
+            'slideshow' => 0,
+            'maxanswers' => $CFG->lesson_maxanswers,
+            'feedback' => 0,
+            'activitylink' => 0,
+            'available' => 0,
+            'deadline' => 0,
+            'usepassword' => 0,
+            'password' => '',
+            'dependency' => 0,
+            'timespent' => 0,
+            'completed' => 0,
+            'gradebetterthan' => 0,
+            'modattempts' => 0,
+            'review' => 0,
+            'maxattempts' => 1,
+            'nextpagedefault' => $CFG->lesson_defaultnextpage,
+            'maxpages' => 0,
+            'practice' => 0,
+            'custom' => 1,
+            'retake' => 0,
+            'usemaxgrade' => 0,
+            'minquestions' => 0,
+            'grade' => 100,
+        );
+        if (!isset($record['mediafile'])) {
+            require_once($CFG->libdir.'/filelib.php');
+            $record['mediafile'] = file_get_unused_draft_itemid();
+        }
+
+        return parent::create_instance($record, (array)$options);
+    }
+
+    public function create_content($lesson, $record = array()) {
+        global $DB, $CFG;
+        require_once($CFG->dirroot.'/mod/lesson/locallib.php');
+        $now = time();
+        $this->pagecount++;
+        $record = (array)$record + array(
+            'lessonid' => $lesson->id,
+            'title' => 'Lesson page '.$this->pagecount,
+            'timecreated' => $now,
+            'qtype' => 20, // LESSON_PAGE_BRANCHTABLE
+            'pageid' => 0, // By default insert in the beginning.
+        );
+        if (!isset($record['contents_editor'])) {
+            $record['contents_editor'] = array(
+                'text' => 'Contents of lesson page '.$this->pagecount,
+                'format' => FORMAT_MOODLE,
+                'itemid' => 0,
+            );
+        }
+        $context = context_module::instance($lesson->cmid);
+        $page = lesson_page::create((object)$record, new lesson($lesson), $context, $CFG->maxbytes);
+        return $DB->get_record('lesson_pages', array('id' => $page->id), '*', MUST_EXIST);
+    }
+}
diff --git a/mod/lesson/tests/generator_test.php b/mod/lesson/tests/generator_test.php
new file mode 100644
index 00000000000..41725a8f6c8
--- /dev/null
+++ b/mod/lesson/tests/generator_test.php
@@ -0,0 +1,73 @@
+<?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/>.
+
+/**
+ * mod_lesson generator tests
+ *
+ * @package    mod_lesson
+ * @category   test
+ * @copyright  2013 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * Genarator tests class for mod_lesson.
+ *
+ * @package    mod_lesson
+ * @category   test
+ * @copyright  2013 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class mod_lesson_generator_testcase extends advanced_testcase {
+
+    public function test_create_instance() {
+        global $DB;
+        $this->resetAfterTest();
+        $this->setAdminUser();
+
+        $course = $this->getDataGenerator()->create_course();
+
+        $this->assertFalse($DB->record_exists('lesson', array('course' => $course->id)));
+        $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course));
+        $records = $DB->get_records('lesson', array('course' => $course->id), 'id');
+        $this->assertEquals(1, count($records));
+        $this->assertTrue(array_key_exists($lesson->id, $records));
+
+        $params = array('course' => $course->id, 'name' => 'Another lesson');
+        $lesson = $this->getDataGenerator()->create_module('lesson', $params);
+        $records = $DB->get_records('lesson', array('course' => $course->id), 'id');
+        $this->assertEquals(2, count($records));
+        $this->assertEquals('Another lesson', $records[$lesson->id]->name);
+    }
+
+    public function test_create_content() {
+        global $DB;
+        $this->resetAfterTest();
+        $this->setAdminUser();
+
+        $course = $this->getDataGenerator()->create_course();
+        $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course));
+        $lessongenerator = $this->getDataGenerator()->get_plugin_generator('mod_lesson');
+
+        $page1 = $lessongenerator->create_content($lesson);
+        $page2 = $lessongenerator->create_content($lesson, array('title' => 'Custom title'));
+        $records = $DB->get_records('lesson_pages', array('lessonid' => $lesson->id), 'id');
+        $this->assertEquals(2, count($records));
+        $this->assertEquals($page1->id, $records[$page1->id]->id);
+        $this->assertEquals($page2->id, $records[$page2->id]->id);
+        $this->assertEquals('Custom title', $records[$page2->id]->title);
+    }
+}