How to use @jupyterlab/docregistry - 10 common examples

it('should resolve after the reveal and context ready promises', async () => {
        const x = Object.create(null);
        const reveal = sleep(300, x);
        const contextReady = Promise.all([context.ready, x]);
        const widget = new DocumentWidget({ context, content, reveal });
        expect(widget.isRevealed).to.equal(false);

        // Our promise should resolve before the widget reveal promise.
        expect(await Promise.race([widget.revealed, reveal])).to.equal(x);
        // The context ready promise should also resolve first.
        void context.initialize(true);
        expect(
          await Promise.race([widget.revealed, contextReady])
        ).to.deep.equal([undefined, x]);
        // The widget.revealed promise should finally resolve.
        expect(await widget.revealed).to.be.undefined;
      });
    });

before(() => {
    const opener: DocumentManager.IWidgetOpener = {
      open: widget => {
        /* no op */
      }
    };

    registry = new DocumentRegistry({
      textModelFactory: new TextModelFactory()
    });
    serviceManager = new ServiceManager({ standby: 'never' });
    manager = new DocumentManager({
      registry,
      opener,
      manager: serviceManager
    });
    state = new StateDB();
  });

before(async () => {
    const opener: DocumentManager.IWidgetOpener = {
      open: widget => {
        /* no op */
      }
    };

    registry = new DocumentRegistry({
      textModelFactory: new TextModelFactory()
    });
    serviceManager = new ServiceManager({ standby: 'never' });
    iconRegistry = defaultIconRegistry;
    manager = new DocumentManager({
      registry,
      opener,
      manager: serviceManager
    });

    const contents = serviceManager.contents;
    await contents.newUntitled({ type: 'directory' });
    await contents.newUntitled({ type: 'file' });
    await contents.newUntitled({ type: 'notebook' });
  });

beforeEach(() => {
    const registry = new DocumentRegistry({ textModelFactory });
    registry.addWidgetFactory(widgetFactory);
    registry.addWidgetFactory(widgetFactoryShared);
    DocumentRegistry.defaultFileTypes.forEach(ft => {
      registry.addFileType(ft);
    });
    manager = new DocumentManager({
      registry,
      manager: services,
      opener: {
        open: (widget: Widget) => {
          // no-op
        }
      }
    });
  });

beforeEach(() => {
    const registry = new DocumentRegistry({ textModelFactory });
    registry.addWidgetFactory(widgetFactory);
    registry.addWidgetFactory(widgetFactoryShared);
    DocumentRegistry.defaultFileTypes.forEach(ft => {
      registry.addFileType(ft);
    });
    manager = new DocumentManager({
      registry,
      manager: services,
      opener: {
        open: (widget: Widget) => {
          // no-op
        }
      }
    });
  });

// Setup the keydown listener for the document.
  document.addEventListener('keydown', event => {
    commands.processKeydownEvent(event);
  }, useCapture);

  let rendermime = new RenderMime({
    initialFactories: defaultRendererFactories
  });

  let opener = {
    open: (widget: Widget) => {
      // Do nothing for sibling widgets for now.
    }
  };

  let docRegistry = new DocumentRegistry();
  let docManager = new DocumentManager({
    registry: docRegistry,
    manager,
    opener
  });
  let mFactory = new NotebookModelFactory({});
  let editorFactory = editorServices.factoryService.newInlineEditor.bind(
    editorServices.factoryService);
  let contentFactory = new NotebookPanel.ContentFactory({ editorFactory });

  let wFactory = new NotebookWidgetFactory({
    name: 'Notebook',
    modelName: 'notebook',
    fileExtensions: ['.ipynb'],
    defaultFor: ['.ipynb'],
    preferKernel: true,

let rendermime = new RenderMimeRegistry({
    initialFactories: initialFactories,
    latexTypesetter: new MathJaxTypesetter({
      url: PageConfig.getOption('mathjaxUrl'),
      config: PageConfig.getOption('mathjaxConfig')
    })
  });

  let opener = {
    open: (widget: Widget) => {
      // Do nothing for sibling widgets for now.
    }
  };

  let docRegistry = new DocumentRegistry();
  let docManager = new DocumentManager({
    registry: docRegistry,
    manager,
    opener
  });
  let mFactory = new NotebookModelFactory({});
  let editorFactory = editorServices.factoryService.newInlineEditor;
  let contentFactory = new NotebookPanel.ContentFactory({ editorFactory });

  let wFactory = new NotebookWidgetFactory({
    name: 'Notebook',
    modelName: 'notebook',
    fileTypes: ['notebook'],
    defaultFor: ['notebook'],
    preferKernel: true,
    canStartKernel: true,

let rendermime = new RenderMimeRegistry({
    initialFactories: initialFactories,
    latexTypesetter: new MathJaxTypesetter({
      url: PageConfig.getOption('mathjaxUrl'),
      config: PageConfig.getOption('mathjaxConfig')
    })
  });

  let opener = {
    open: (widget: Widget) => {
      // Do nothing for sibling widgets for now.
    }
  };

  let docRegistry = new DocumentRegistry();
  let docManager = new DocumentManager({
    registry: docRegistry,
    manager,
    opener
  });
  let mFactory = new NotebookModelFactory({});
  let editorFactory = editorServices.factoryService.newInlineEditor;
  let contentFactory = new NotebookPanel.ContentFactory({ editorFactory });

  let wFactory = new NotebookWidgetFactory({
    name: 'Notebook',
    modelName: 'notebook',
    fileTypes: ['notebook'],
    defaultFor: ['notebook'],
    preferKernel: true,
    canStartKernel: true,

// old context before opening the new context. This will make things much
    // more consistent for the users, at the cost of some confusion about what
    // models are and why sometimes they cannot open the same file in different
    // widgets that have different models.

    // Allow options to be passed when adding a sibling.
    let adopter = (
      widget: IDocumentWidget,
      options?: DocumentRegistry.IOpenOptions
    ) => {
      this._widgetManager.adoptWidget(context, widget);
      this._opener.open(widget, options);
    };
    let modelDBFactory =
      this.services.contents.getModelDBFactory(path) || undefined;
    let context = new Context({
      opener: adopter,
      manager: this.services,
      factory,
      path,
      kernelPreference,
      modelDBFactory,
      setBusy: this._setBusy
    });
    let handler = new SaveHandler({
      context,
      saveInterval: this.autosaveInterval
    });
    Private.saveHandlerProperty.set(context, handler);
    void context.ready.then(() => {
      if (this.autosave) {
        handler.start();

// old context before opening the new context. This will make things much
    // more consistent for the users, at the cost of some confusion about what
    // models are and why sometimes they cannot open the same file in different
    // widgets that have different models.

    // Allow options to be passed when adding a sibling.
    let adopter = (
      widget: IDocumentWidget,
      options?: DocumentRegistry.IOpenOptions
    ) => {
      this._widgetManager.adoptWidget(context, widget);
      this._opener.open(widget, options);
    };
    let modelDBFactory =
      this.services.contents.getModelDBFactory(path) || undefined;
    let context = new Context({
      opener: adopter,
      manager: this.services,
      factory,
      path,
      kernelPreference,
      modelDBFactory,
      setBusy: this._setBusy
    });
    let handler = new SaveHandler({
      context,
      saveInterval: this.autosaveInterval
    });
    Private.saveHandlerProperty.set(context, handler);
    context.ready.then(() => {
      if (this.autosave) {
        handler.start();