public function test_forum_trigger_content_uploaded_event() {
        $this->resetAfterTest();

        $user = $this->getDataGenerator()->create_user();
        $course = $this->getDataGenerator()->create_course();
        $forum = $this->getDataGenerator()->create_module('forum', array('course' => $course->id));
        $context = context_module::instance($forum->cmid);

        $this->setUser($user->id);
        $fakepost = (object) array('id' => 123, 'message' => 'Yay!', 'discussion' => 100);
        $cm = get_coursemodule_from_instance('forum', $forum->cmid);

        $fs = get_file_storage();
        $dummy = (object) array(
            'contextid' => $context->id,
            'component' => 'mod_forum',
            'filearea' => 'attachment',
            'itemid' => $fakepost->id,
            'filepath' => '/',
            'filename' => 'myassignmnent.pdf'
        );
        $fi = $fs->create_file_from_string($dummy, 'Content of ' . $dummy->filename);

        $data = new stdClass();
        $sink = $this->redirectEvents();
        forum_trigger_content_uploaded_event($fakepost, $cm, 'some triggered from value');
        $events = $sink->get_events();

        $this->assertCount(1, $events);
        $event = reset($events);
        $this->assertInstanceOf('\mod_forum\event\assessable_uploaded', $event);
        $this->assertEquals($context->id, $event->contextid);
        $this->assertEquals($fakepost->id, $event->objectid);
        $this->assertEquals($fakepost->message, $event->other['content']);
        $this->assertEquals($fakepost->discussion, $event->other['discussionid']);
        $this->assertCount(1, $event->other['pathnamehashes']);
        $this->assertEquals($fi->get_pathnamehash(), $event->other['pathnamehashes'][0]);
        $expected = new stdClass();
        $expected->modulename = 'forum';
        $expected->name = 'some triggered from value';
        $expected->cmid = $forum->cmid;
        $expected->itemid = $fakepost->id;
        $expected->courseid = $course->id;
        $expected->userid = $user->id;
        $expected->content = $fakepost->message;
        $expected->pathnamehashes = array($fi->get_pathnamehash());
        $this->assertEventLegacyData($expected, $event);
        $this->assertEventContextNotUsed($event);
    }

/**
 * Given an object containing all the necessary data,
 * create a new discussion and return the id
 *
 * @param object $post
 * @param mixed $mform
 * @param string $unused
 * @param int $userid
 * @return object
 */
function forum_add_discussion($discussion, $mform=null, $unused=null, $userid=null) {
    global $USER, $CFG, $DB;

    $timenow = time();

    if (is_null($userid)) {
        $userid = $USER->id;
    }

    // The first post is stored as a real post, and linked
    // to from the discuss entry.

    $forum = $DB->get_record('forum', array('id'=>$discussion->forum));
    $cm    = get_coursemodule_from_instance('forum', $forum->id);

    $post = new stdClass();
    $post->discussion    = 0;
    $post->parent        = 0;
    $post->userid        = $userid;
    $post->created       = $timenow;
    $post->modified      = $timenow;
    $post->mailed        = FORUM_MAILED_PENDING;
    $post->subject       = $discussion->name;
    $post->message       = $discussion->message;
    $post->messageformat = $discussion->messageformat;
    $post->messagetrust  = $discussion->messagetrust;
    $post->attachments   = isset($discussion->attachments) ? $discussion->attachments : null;
    $post->forum         = $forum->id;     // speedup
    $post->course        = $forum->course; // speedup
    $post->mailnow       = $discussion->mailnow;

    $post->id = $DB->insert_record("forum_posts", $post);

    // TODO: Fix the calling code so that there always is a $cm when this function is called
    if (!empty($cm->id) && !empty($discussion->itemid)) {   // In "single simple discussions" this may not exist yet
        $context = context_module::instance($cm->id);
        $text = file_save_draft_area_files($discussion->itemid, $context->id, 'mod_forum', 'post', $post->id,
                mod_forum_post_form::editor_options(), $post->message);
        $DB->set_field('forum_posts', 'message', $text, array('id'=>$post->id));
    }

    // Now do the main entry for the discussion, linking to this first post

    $discussion->firstpost    = $post->id;
    $discussion->timemodified = $timenow;
    $discussion->usermodified = $post->userid;
    $discussion->userid       = $userid;

    $post->discussion = $DB->insert_record("forum_discussions", $discussion);

    // Finally, set the pointer on the post.
    $DB->set_field("forum_posts", "discussion", $post->discussion, array("id"=>$post->id));

    if (!empty($cm->id)) {
        forum_add_attachment($post, $forum, $cm, $mform, $unused);
    }

    if (forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) {
        forum_tp_mark_post_read($post->userid, $post, $post->forum);
    }

    // Let Moodle know that assessable content is uploaded (eg for plagiarism detection)
    if (!empty($cm->id)) {
        forum_trigger_content_uploaded_event($post, $cm, 'forum_add_discussion');
    }

    return $post->discussion;
}