public function test_document_services()
 {
     $sepl = $this->create_sepl_and_submit_pdf();
     $this->setUser($this->teachers[0]);
     $grade = $sepl->get_user_grade($this->students[0]->id, true);
     $notempty = page_editor::has_annotations_or_comments($grade->id, false);
     $this->assertFalse($notempty);
     $comment = new comment();
     $comment->rawtext = 'Comment text';
     $comment->width = 100;
     $comment->x = 100;
     $comment->y = 100;
     $comment->colour = 'red';
     page_editor::set_comments($grade->id, 0, array($comment));
     $annotations = array();
     $annotation = new annotation();
     $annotation->path = '';
     $annotation->x = 100;
     $annotation->y = 100;
     $annotation->endx = 200;
     $annotation->endy = 200;
     $annotation->type = 'line';
     $annotation->colour = 'red';
     array_push($annotations, $annotation);
     $annotation = new annotation();
     $annotation->path = '';
     $annotation->x = 100;
     $annotation->y = 100;
     $annotation->endx = 200;
     $annotation->endy = 200;
     $annotation->type = 'rectangle';
     $annotation->colour = 'yellow';
     array_push($annotations, $annotation);
     $annotation = new annotation();
     $annotation->path = '';
     $annotation->x = 100;
     $annotation->y = 100;
     $annotation->endx = 200;
     $annotation->endy = 200;
     $annotation->type = 'oval';
     $annotation->colour = 'green';
     array_push($annotations, $annotation);
     $annotation = new annotation();
     $annotation->path = '';
     $annotation->x = 100;
     $annotation->y = 100;
     $annotation->endx = 200;
     $annotation->endy = 116;
     $annotation->type = 'highlight';
     $annotation->colour = 'blue';
     array_push($annotations, $annotation);
     $annotation = new annotation();
     $annotation->path = '100,100:105,105:110,100';
     $annotation->x = 100;
     $annotation->y = 100;
     $annotation->endx = 110;
     $annotation->endy = 105;
     $annotation->type = 'pen';
     $annotation->colour = 'black';
     array_push($annotations, $annotation);
     page_editor::set_annotations($grade->id, 0, $annotations);
     page_editor::release_drafts($grade->id);
     $notempty = page_editor::has_annotations_or_comments($grade->id, false);
     $this->assertTrue($notempty);
     $file = document_services::generate_feedback_document($sepl->get_instance()->id, $grade->userid, $grade->attemptnumber);
     $this->assertNotEmpty($file);
     $file2 = document_services::get_feedback_document($sepl->get_instance()->id, $grade->userid, $grade->attemptnumber);
     $this->assertEquals($file, $file2);
     document_services::delete_feedback_document($sepl->get_instance()->id, $grade->userid, $grade->attemptnumber);
     $file3 = document_services::get_feedback_document($sepl->get_instance()->id, $grade->userid, $grade->attemptnumber);
     $this->assertEmpty($file3);
 }