You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: app.rs
    path of file: ./repos/crux/examples/notes/shared/src
    
    the code of the file until where you have to start completion: mod note;

use std::ops::Range;

use automerge::Change;
use crux_core::{render::Render, App};
use crux_kv::
    
    fn creates_a_document_if_it_cant_open_one() {
        let app = AppTester::<NoteEditor, _>::default();

        let mut model = Model {
            note: Note::with_text("hello"),
            cursor: TextCursor::Selection(2..4),
            ..Default::default()
        };

        // this will eventually take a document ID
        let requests = &mut app
            .update(Event::Open, &mut model)
            .into_effects()
            .filter_map(Effect::into_key_value);

        let mut request = requests.next().unwrap();
        assert_let!(KeyValueOperation::Read(key), &request.operation);
        assert_eq!(key, "note");

        assert!(requests.next().is_none());

        // Read was unsuccessful
        let update = app
            .resolve(&mut request, KeyValueOutput::Read(None))
            .unwrap();
        assert_eq!(update.events.len(), 1);

        for e in update.events {
            let save = app
                .update(e, &mut model)
                .into_effects()
                .find_map(Effect::into_key_value)
                .unwrap();

            assert_let!(KeyValueOperation::Write(key, _), &save.operation);
            assert_eq!(key, "note");
        }
    }