// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.

import {
  CommandToolbarButton,
  createToolbarFactory,
  ReactiveToolbar,
  SessionContext,
  Toolbar,
  ToolbarButton,
  ToolbarRegistry,
  ToolbarWidgetRegistry
} from '@jupyterlab/apputils';
import { ISettingRegistry, SettingRegistry } from '@jupyterlab/settingregistry';
import { IDataConnector } from '@jupyterlab/statedb';
import {
  createSessionContext,
  framePromise,
  JupyterServer
} from '@jupyterlab/testutils';
import { ITranslator } from '@jupyterlab/translation';
import {
  blankIcon,
  bugDotIcon,
  bugIcon,
  jupyterIcon
} from '@jupyterlab/ui-components';
import { toArray } from '@lumino/algorithm';
import { CommandRegistry } from '@lumino/commands';
import {
  JSONExt,
  PromiseDelegate,
  ReadonlyPartialJSONObject
} from '@lumino/coreutils';
import { PanelLayout, Widget } from '@lumino/widgets';
import { simulate } from 'simulate-event';

const server = new JupyterServer();

beforeAll(async () => {
  await server.start();
});

afterAll(async () => {
  await server.shutdown();
});

describe('@jupyterlab/apputils', () => {
  describe('CommandToolbarButton', () => {
    let commands: CommandRegistry;
    const id = 'test-command';
    const options: CommandRegistry.ICommandOptions = {
      execute: jest.fn()
    };

    beforeEach(() => {
      commands = new CommandRegistry();
    });

    it('should render a command', async () => {
      commands.addCommand(id, options);
      const button = new CommandToolbarButton({
        commands,
        id
      });

      Widget.attach(button, document.body);
      await framePromise();

      expect(button.hasClass('jp-CommandToolbarButton')).toBe(true);
      simulate(button.node.firstElementChild!, 'mousedown');
      expect(options.execute).toBeCalledTimes(1);
    });

    it('should render the label command', async () => {
      const label = 'This is a test label';
      commands.addCommand(id, { ...options, label });
      const button = new CommandToolbarButton({
        commands,
        id
      });

      Widget.attach(button, document.body);
      await framePromise();

      expect(button.node.textContent).toMatch(label);
    });

    it('should render the customized label command', async () => {
      const label = 'This is a test label';
      const buttonLabel = 'This is the button label';
      commands.addCommand(id, { ...options, label });
      const button = new CommandToolbarButton({
        commands,
        id,
        label: buttonLabel
      });

      Widget.attach(button, document.body);
      await framePromise();

      expect(button.node.textContent).toMatch(buttonLabel);
      expect(button.node.textContent).not.toMatch(label);
    });

    it('should render the icon command', async () => {
      const icon = jupyterIcon;
      commands.addCommand(id, { ...options, icon });
      const button = new CommandToolbarButton({
        commands,
        id
      });

      Widget.attach(button, document.body);
      await framePromise();

      expect(button.node.getElementsByTagName('svg')[0].dataset.icon).toMatch(
        icon.name
      );
    });

    it('should render the customized icon command', async () => {
      const icon = jupyterIcon;
      const buttonIcon = blankIcon;
      commands.addCommand(id, { ...options, icon });
      const button = new CommandToolbarButton({
        commands,
        id,
        icon: buttonIcon
      });

      Widget.attach(button, document.body);
      await framePromise();

      const iconSVG = button.node.getElementsByTagName('svg')[0];
      expect(iconSVG.dataset.icon).toMatch(buttonIcon.name);
      expect(iconSVG.dataset.icon).not.toMatch(icon.name);
    });
  });

  describe('Toolbar', () => {
    let widget: Toolbar<Widget>;

    beforeEach(async () => {
      jest.setTimeout(20000);
      widget = new Toolbar();
    });

    afterEach(async () => {
      widget.dispose();
    });

    describe('#constructor()', () => {
      it('should construct a new toolbar widget', () => {
        const widget = new Toolbar();
        expect(widget).toBeInstanceOf(Toolbar);
      });

      it('should add the `jp-Toolbar` class', () => {
        const widget = new Toolbar();
        expect(widget.hasClass('jp-Toolbar')).toBe(true);
      });
    });

    describe('#names()', () => {
      it('should get an ordered list the toolbar item names', () => {
        widget.addItem('foo', new Widget());
        widget.addItem('bar', new Widget());
        widget.addItem('baz', new Widget());
        expect(toArray(widget.names())).toEqual(['foo', 'bar', 'baz']);
      });
    });

    describe('#addItem()', () => {
      it('should add an item to the toolbar', () => {
        const item = new Widget();
        expect(widget.addItem('test', item)).toBe(true);
        expect(toArray(widget.names())).toContain('test');
      });

      it('should add the `jp-Toolbar-item` class to the widget', () => {
        const item = new Widget();
        widget.addItem('test', item);
        expect(item.hasClass('jp-Toolbar-item')).toBe(true);
      });

      it('should return false if the name is already used', () => {
        widget.addItem('test', new Widget());
        expect(widget.addItem('test', new Widget())).toBe(false);
      });
    });

    describe('#insertItem()', () => {
      it('should insert the item into the toolbar', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        widget.insertItem(1, 'c', new Widget());
        expect(toArray(widget.names())).toEqual(['a', 'c', 'b']);
      });

      it('should clamp the bounds', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        widget.insertItem(10, 'c', new Widget());
        expect(toArray(widget.names())).toEqual(['a', 'b', 'c']);
      });
    });

    describe('#insertAfter()', () => {
      it('should insert an item into the toolbar after `c`', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        widget.insertItem(1, 'c', new Widget());
        widget.insertAfter('c', 'd', new Widget());
        expect(toArray(widget.names())).toEqual(['a', 'c', 'd', 'b']);
      });

      it('should return false if the target item does not exist', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        const value = widget.insertAfter('c', 'd', new Widget());
        expect(value).toBe(false);
      });
    });

    describe('#insertBefore()', () => {
      it('should insert an item into the toolbar before `c`', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        widget.insertItem(1, 'c', new Widget());
        widget.insertBefore('c', 'd', new Widget());
        expect(toArray(widget.names())).toEqual(['a', 'd', 'c', 'b']);
      });

      it('should return false if the target item does not exist', () => {
        widget.addItem('a', new Widget());
        widget.addItem('b', new Widget());
        const value = widget.insertBefore('c', 'd', new Widget());
        expect(value).toBe(false);
      });
    });

    describe('.createFromCommand', () => {
      const commands = new CommandRegistry();
      const testLogCommandId = 'test:toolbar-log';
      const logArgs: ReadonlyPartialJSONObject[] = [];
      let enabled = false;
      let toggled = true;
      let visible = false;
      commands.addCommand(testLogCommandId, {
        execute: args => {
          logArgs.push(args);
        },
        label: 'Test log command label',
        caption: 'Test log command caption',
        usage: 'Test log command usage',
        iconClass: 'test-icon-class',
        className: 'test-log-class',
        isEnabled: () => enabled,
        isToggled: () => toggled,
        isVisible: () => visible
      });

      async function render(button: CommandToolbarButton) {
        button.update();
        await framePromise();
        expect(button.renderPromise).toBeDefined();
        await button.renderPromise;
      }

      it('should create a button', () => {
        const button = new CommandToolbarButton({
          commands,
          id: testLogCommandId
        });
        expect(button).toBeInstanceOf(CommandToolbarButton);
        button.dispose();
      });

      it('should add main class', async () => {
        const button = new CommandToolbarButton({
          commands,
          id: testLogCommandId
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.classList.contains('test-log-class')).toBe(true);
        button.dispose();
      });

      it('should add an icon with icon class and label', async () => {
        const button = new CommandToolbarButton({
          commands,
          id: testLogCommandId
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.title).toBe('Test log command caption');
        const wrapperNode = buttonNode.firstChild as HTMLElement;
        const iconNode = wrapperNode.firstChild as HTMLElement;
        expect(iconNode.classList.contains('test-icon-class')).toBe(true);
        button.dispose();
      });

      it('should apply state classes', async () => {
        enabled = false;
        toggled = true;
        visible = false;
        const button = new CommandToolbarButton({
          commands,
          id: testLogCommandId
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.disabled).toBe(true);
        expect(buttonNode.classList.contains('lm-mod-toggled')).toBe(true);
        expect(buttonNode.classList.contains('lm-mod-hidden')).toBe(true);
        button.dispose();
      });

      it('should update state classes', async () => {
        enabled = false;
        toggled = true;
        visible = false;
        const button = new CommandToolbarButton({
          commands,
          id: testLogCommandId
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.disabled).toBe(true);
        expect(buttonNode.classList.contains('lm-mod-toggled')).toBe(true);
        expect(buttonNode.classList.contains('lm-mod-hidden')).toBe(true);
        enabled = true;
        visible = true;
        commands.notifyCommandChanged(testLogCommandId);
        expect(buttonNode.disabled).toBe(false);
        expect(buttonNode.classList.contains('lm-mod-toggled')).toBe(true);
        expect(buttonNode.classList.contains('lm-mod-hidden')).toBe(false);
        enabled = false;
        visible = false;
        button.dispose();
      });

      it('should use the command label if no icon class/label', async () => {
        const id = 'to-be-removed';
        const cmd = commands.addCommand(id, {
          execute: () => {
            return;
          },
          label: 'Label-only button'
        });
        const button = new CommandToolbarButton({
          commands,
          id
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.textContent).toBe('Label-only button');
        cmd.dispose();
      });

      it('should update the node content on command change event', async () => {
        const id = 'to-be-removed';
        let iconClassValue: string = '';
        const cmd = commands.addCommand(id, {
          execute: () => {
            /* no op */
          },
          label: 'Label-only button',
          iconClass: () => iconClassValue ?? ''
        });
        const button = new CommandToolbarButton({
          commands,
          id
        });
        await render(button);
        const buttonNode = button.node.firstChild as HTMLButtonElement;
        expect(buttonNode.textContent).toBe('Label-only button');
        expect(buttonNode.classList.contains(iconClassValue)).toBe(false);

        iconClassValue = 'updated-icon-class';
        commands.notifyCommandChanged(id);
        await render(button);
        const wrapperNode = buttonNode.firstChild as HTMLElement;
        const iconNode = wrapperNode.firstChild as HTMLElement;
        expect(iconNode.classList.contains(iconClassValue)).toBe(true);
        cmd.dispose();
      });
    });

    describe('Kernel buttons', () => {
      let sessionContext: SessionContext;
      beforeEach(async () => {
        sessionContext = await createSessionContext();
      });

      afterEach(async () => {
        await sessionContext.shutdown();
        sessionContext.dispose();
      });

      describe('.createInterruptButton()', () => {
        it("should add an inline svg node with the 'stop' icon", async () => {
          const button = Toolbar.createInterruptButton(sessionContext);
          Widget.attach(button, document.body);
          await framePromise();
          expect(
            button.node.querySelector("[data-icon$='stop']")
          ).toBeDefined();
        });
      });

      describe('.createRestartButton()', () => {
        it("should add an inline svg node with the 'refresh' icon", async () => {
          const button = Toolbar.createRestartButton(sessionContext);
          Widget.attach(button, document.body);
          await framePromise();
          expect(
            button.node.querySelector("[data-icon$='refresh']")
          ).toBeDefined();
        });
      });

      describe('.createKernelNameItem()', () => {
        it("should display the `'display_name'` of the kernel", async () => {
          const item = Toolbar.createKernelNameItem(sessionContext);
          await sessionContext.initialize();
          Widget.attach(item, document.body);
          await framePromise();
          const node = item.node.querySelector(
            '.jp-ToolbarButtonComponent-label'
          )!;
          expect(node.textContent).toBe(sessionContext.kernelDisplayName);
        });
      });

      describe('.createKernelStatusItem()', () => {
        beforeEach(async () => {
          await sessionContext.initialize();
          await sessionContext.session?.kernel?.info;
        });

        it('should display a busy status if the kernel status is busy', async () => {
          const item = Toolbar.createKernelStatusItem(sessionContext);
          let called = false;
          sessionContext.statusChanged.connect((_, status) => {
            if (status === 'busy') {
              expect(
                item.node.querySelector("[data-icon$='circle']")
              ).toBeDefined();
              called = true;
            }
          });
          const future = sessionContext.session?.kernel?.requestExecute({
            code: 'a = 109\na'
          })!;
          await future.done;
          expect(called).toBe(true);
        });

        it('should show the current status in the node title', async () => {
          const item = Toolbar.createKernelStatusItem(sessionContext);
          const status = sessionContext.session?.kernel?.status;
          expect(item.node.title.toLowerCase()).toContain(status);
          let called = false;
          const future = sessionContext.session?.kernel?.requestExecute({
            code: 'a = 1'
          })!;
          future.onIOPub = msg => {
            if (sessionContext.session?.kernel?.status === 'busy') {
              expect(item.node.title.toLowerCase()).toContain('busy');
              called = true;
            }
          };
          await future.done;
          expect(called).toBe(true);
        });

        it('should handle a starting session', async () => {
          await sessionContext.session?.kernel?.info;
          await sessionContext.shutdown();
          sessionContext = await createSessionContext();
          await sessionContext.initialize();
          const item = Toolbar.createKernelStatusItem(sessionContext);
          expect(item.node.title).toBe('Kernel Connecting');
          expect(
            item.node.querySelector("[data-icon$='circle-empty']")
          ).toBeDefined();
          await sessionContext.initialize();
          await sessionContext.session?.kernel?.info;
        });
      });
    });
  });

  describe('ReactiveToolbar', () => {
    let toolbar: ReactiveToolbar;

    beforeEach(() => {
      toolbar = new ReactiveToolbar();
      Widget.attach(toolbar, document.body);
    });

    afterEach(() => {
      toolbar.dispose();
    });

    describe('#constructor()', () => {
      it('should append a node to body for the pop-up', () => {
        const popup = document.body.querySelector(
          '.jp-Toolbar-responsive-popup'
        );
        expect(popup).toBeDefined();
        expect(popup!.parentNode!.nodeName).toEqual('BODY');
      });
    });

    describe('#addItem()', () => {
      it('should insert item before the toolbar pop-up button', () => {
        const w = new Widget();
        toolbar.addItem('test', w);
        expect(
          (toolbar.layout as PanelLayout).widgets.findIndex(v => v === w)
        ).toEqual((toolbar.layout as PanelLayout).widgets.length - 2);
      });
    });

    describe('#insertItem()', () => {
      it('should insert item before the toolbar pop-up button', () => {
        const w = new Widget();
        toolbar.insertItem(2, 'test', w);
        expect(
          (toolbar.layout as PanelLayout).widgets.findIndex(v => v === w)
        ).toEqual((toolbar.layout as PanelLayout).widgets.length - 2);
      });
    });

    describe('#insertAfter()', () => {
      it('should not insert item after the toolbar pop-up button', () => {
        const w = new Widget();
        const r = toolbar.insertAfter('toolbar-popup-opener', 'test', w);
        expect(r).toEqual(false);
        expect(
          (toolbar.layout as PanelLayout).widgets.findIndex(v => v === w)
        ).toEqual(-1);
      });
    });
  });

  describe('ToolbarButton', () => {
    describe('#constructor()', () => {
      it('should accept no arguments', () => {
        const widget = new ToolbarButton();
        expect(widget).toBeInstanceOf(ToolbarButton);
      });

      it('should accept options', async () => {
        const widget = new ToolbarButton({
          className: 'foo',
          iconClass: 'iconFoo',
          onClick: () => {
            return void 0;
          },
          tooltip: 'bar'
        });
        Widget.attach(widget, document.body);
        await framePromise();
        const button = widget.node.firstChild as HTMLElement;
        expect(button.classList.contains('foo')).toBe(true);
        expect(button.querySelector('.iconFoo')).toBeDefined();
        expect(button.title).toBe('bar');
      });
    });

    describe('#dispose()', () => {
      it('should dispose of the resources used by the widget', () => {
        const button = new ToolbarButton();
        button.dispose();
        expect(button.isDisposed).toBe(true);
      });

      it('should be safe to call more than once', () => {
        const button = new ToolbarButton();
        button.dispose();
        button.dispose();
        expect(button.isDisposed).toBe(true);
      });
    });

    describe('#handleEvent()', () => {
      describe('click', () => {
        it('should activate the callback', async () => {
          let called = false;
          const button = new ToolbarButton({
            onClick: () => {
              called = true;
            }
          });
          Widget.attach(button, document.body);
          await framePromise();
          simulate(button.node.firstChild as HTMLElement, 'mousedown');
          expect(called).toBe(true);
          button.dispose();
        });
      });
      describe('keydown', () => {
        it('Enter should activate the callback', async () => {
          let called = false;
          const button = new ToolbarButton({
            onClick: () => {
              called = true;
            }
          });
          Widget.attach(button, document.body);
          await framePromise();
          simulate(button.node.firstChild as HTMLElement, 'keydown', {
            key: 'Enter'
          });
          expect(called).toBe(true);
          button.dispose();
        });
        it('Space should activate the callback', async () => {
          let called = false;
          const button = new ToolbarButton({
            onClick: () => {
              called = true;
            }
          });
          Widget.attach(button, document.body);
          await framePromise();
          simulate(button.node.firstChild as HTMLElement, 'keydown', {
            key: ' '
          });
          expect(called).toBe(true);
          button.dispose();
        });
      });
    });

    describe('#pressed()', () => {
      it('should update the pressed state', async () => {
        const widget = new ToolbarButton({
          icon: bugIcon,
          tooltip: 'tooltip',
          pressedTooltip: 'pressed tooltip',
          pressedIcon: bugDotIcon
        });
        Widget.attach(widget, document.body);
        await framePromise();
        const button = widget.node.firstChild as HTMLElement;
        expect(widget.pressed).toBe(false);
        expect(button.title).toBe('tooltip');
        expect(button.getAttribute('aria-pressed')).toEqual('false');
        let icon = button.querySelectorAll('svg');
        expect(icon[0].getAttribute('data-icon')).toEqual('ui-components:bug');
        widget.pressed = true;
        await framePromise();
        expect(widget.pressed).toBe(true);
        expect(button.title).toBe('pressed tooltip');
        expect(button.getAttribute('aria-pressed')).toEqual('true');
        icon = button.querySelectorAll('svg');
        expect(icon[0].getAttribute('data-icon')).toEqual(
          'ui-components:bug-dot'
        );
        widget.dispose();
      });

      it('should not have the pressed state when not enabled', async () => {
        const widget = new ToolbarButton({
          icon: bugIcon,
          tooltip: 'tooltip',
          pressedTooltip: 'pressed tooltip',
          disabledTooltip: 'disabled tooltip',
          pressedIcon: bugDotIcon,
          enabled: false
        });
        Widget.attach(widget, document.body);
        await framePromise();
        const button = widget.node.firstChild as HTMLElement;
        expect(widget.pressed).toBe(false);
        expect(button.title).toBe('disabled tooltip');
        expect(button.getAttribute('aria-pressed')).toEqual('false');
        widget.pressed = true;
        await framePromise();
        expect(widget.pressed).toBe(false);
        expect(button.title).toBe('disabled tooltip');
        expect(button.getAttribute('aria-pressed')).toEqual('false');
        const icon = button.querySelectorAll('svg');
        expect(icon[0].getAttribute('data-icon')).toEqual('ui-components:bug');
        widget.dispose();
      });
    });

    describe('#enabled()', () => {
      it('should update the enabled state', async () => {
        const widget = new ToolbarButton({
          icon: bugIcon,
          tooltip: 'tooltip',
          pressedTooltip: 'pressed tooltip',
          disabledTooltip: 'disabled tooltip',
          pressedIcon: bugDotIcon
        });
        Widget.attach(widget, document.body);
        await framePromise();
        const button = widget.node.firstChild as HTMLElement;
        expect(widget.enabled).toBe(true);
        expect(widget.pressed).toBe(false);
        expect(button.getAttribute('aria-disabled')).toEqual('false');

        widget.pressed = true;
        await framePromise();
        expect(widget.pressed).toBe(true);

        widget.enabled = false;
        await framePromise();
        expect(widget.enabled).toBe(false);
        expect(widget.pressed).toBe(false);
        expect(button.getAttribute('aria-disabled')).toEqual('true');
        widget.dispose();
      });
    });

    describe('#onClick()', () => {
      it('should update the onClick state', async () => {
        let mockCalled = false;
        const mockOnClick = () => {
          mockCalled = true;
        };
        const widget = new ToolbarButton({
          icon: bugIcon,
          tooltip: 'tooltip',
          onClick: mockOnClick
        });
        Widget.attach(widget, document.body);
        await framePromise();
        simulate(widget.node.firstChild as HTMLElement, 'mousedown');
        expect(mockCalled).toBe(true);

        mockCalled = false;
        let mockUpdatedCalled = false;
        const mockOnClickUpdated = () => {
          mockUpdatedCalled = true;
        };
        widget.onClick = mockOnClickUpdated;
        await framePromise();
        simulate(widget.node.firstChild as HTMLElement, 'mousedown');
        expect(mockCalled).toBe(false);
        expect(mockUpdatedCalled).toBe(true);
        widget.dispose();
      });
    });
  });

  describe('ToolbarWidgetRegistry', () => {
    describe('#constructor', () => {
      it('should set a default factory', () => {
        const dummy = jest.fn();
        const registry = new ToolbarWidgetRegistry({
          defaultFactory: dummy
        });

        expect(registry.defaultFactory).toBe(dummy);
      });
    });

    describe('#defaultFactory', () => {
      it('should set a default factory', () => {
        const dummy = jest.fn();
        const dummy2 = jest.fn();
        const registry = new ToolbarWidgetRegistry({
          defaultFactory: dummy
        });

        registry.defaultFactory = dummy2;

        expect(registry.defaultFactory).toBe(dummy2);
      });
    });

    describe('#createWidget', () => {
      it('should call the default factory as fallback', () => {
        const documentWidget = new Widget();
        const dummyWidget = new Widget();
        const dummy = jest.fn().mockReturnValue(dummyWidget);
        const registry = new ToolbarWidgetRegistry({
          defaultFactory: dummy
        });

        const item: ToolbarRegistry.IWidget = {
          name: 'test'
        };

        const widget = registry.createWidget('factory', documentWidget, item);

        expect(widget).toBe(dummyWidget);
        expect(dummy).toBeCalledWith('factory', documentWidget, item);
      });

      it('should call the registered factory', () => {
        const documentWidget = new Widget();
        const dummyWidget = new Widget();
        const defaultFactory = jest.fn().mockReturnValue(dummyWidget);
        const dummy = jest.fn().mockReturnValue(dummyWidget);
        const registry = new ToolbarWidgetRegistry({
          defaultFactory
        });

        const item: ToolbarRegistry.IWidget = {
          name: 'test'
        };

        registry.registerFactory('factory', item.name, dummy);

        const widget = registry.createWidget('factory', documentWidget, item);

        expect(widget).toBe(dummyWidget);
        expect(dummy).toBeCalledWith(documentWidget);
        expect(defaultFactory).toBeCalledTimes(0);
      });
    });

    describe('#registerFactory', () => {
      it('should return the previous registered factory', () => {
        const defaultFactory = jest.fn();
        const dummy = jest.fn();
        const dummy2 = jest.fn();
        const registry = new ToolbarWidgetRegistry({
          defaultFactory
        });

        const item: ToolbarRegistry.IWidget = {
          name: 'test'
        };

        expect(
          registry.registerFactory('factory', item.name, dummy)
        ).toBeUndefined();
        expect(registry.registerFactory('factory', item.name, dummy2)).toBe(
          dummy
        );
      });
    });
  });

  describe('createToolbarFactory', () => {
    it('should return the toolbar items', async () => {
      const factoryName = 'dummyFactory';
      const pluginId = 'test-plugin:settings';
      const toolbarRegistry = new ToolbarWidgetRegistry({
        defaultFactory: jest.fn()
      });

      const bar: ISettingRegistry.IPlugin = {
        data: {
          composite: {},
          user: {}
        },
        id: pluginId,
        raw: '{}',
        schema: {
          'jupyter.lab.toolbars': {
            dummyFactory: [
              {
                name: 'insert',
                command: 'notebook:insert-cell-below',
                rank: 20
              },
              { name: 'spacer', type: 'spacer', rank: 100 },
              { name: 'cut', command: 'notebook:cut-cell', rank: 21 },
              {
                name: 'clear-all',
                command: 'notebook:clear-all-cell-outputs',
                rank: 60,
                disabled: true
              }
            ]
          },
          'jupyter.lab.transform': true,
          properties: {
            toolbar: {
              type: 'array'
            }
          },
          type: 'object'
        },
        version: 'test'
      };

      const connector: IDataConnector<
        ISettingRegistry.IPlugin,
        string,
        string,
        string
      > = {
        fetch: jest.fn().mockImplementation((id: string) => {
          switch (id) {
            case bar.id:
              return bar;
            default:
              return {};
          }
        }),
        list: jest.fn(),
        save: jest.fn(),
        remove: jest.fn()
      };

      const settingRegistry = new SettingRegistry({
        connector
      });

      const translator: ITranslator = {
        load: jest.fn()
      };

      const factory = createToolbarFactory(
        toolbarRegistry,
        settingRegistry,
        factoryName,
        pluginId,
        translator
      );

      await settingRegistry.load(bar.id);

      const items = factory(new Widget());
      expect(items).toHaveLength(3);
      expect(items.get(0).name).toEqual('insert');
      expect(items.get(1).name).toEqual('cut');
      expect(items.get(2).name).toEqual('spacer');
    });

    it('should update the toolbar items with late settings load', async () => {
      const factoryName = 'dummyFactory';
      const pluginId = 'test-plugin:settings';
      const toolbarRegistry = new ToolbarWidgetRegistry({
        defaultFactory: jest.fn()
      });

      const foo: ISettingRegistry.IPlugin = {
        data: {
          composite: {},
          user: {}
        },
        id: 'foo',
        raw: '{}',
        schema: {
          'jupyter.lab.toolbars': {
            dummyFactory: [
              { name: 'cut', command: 'notebook:cut-cell', rank: 21 },
              { name: 'insert', rank: 40 },
              {
                name: 'clear-all',
                disabled: true
              }
            ]
          },
          type: 'object'
        },
        version: 'test'
      };
      const bar: ISettingRegistry.IPlugin = {
        data: {
          composite: {},
          user: {}
        },
        id: pluginId,
        raw: '{}',
        schema: {
          'jupyter.lab.toolbars': {
            dummyFactory: [
              {
                name: 'insert',
                command: 'notebook:insert-cell-below',
                rank: 20
              },
              {
                name: 'clear-all',
                command: 'notebook:clear-all-cell-outputs',
                rank: 60
              }
            ]
          },
          'jupyter.lab.transform': true,
          properties: {
            toolbar: {
              type: 'array'
            }
          },
          type: 'object'
        },
        version: 'test'
      };

      const connector: IDataConnector<
        ISettingRegistry.IPlugin,
        string,
        string,
        string
      > = {
        fetch: jest.fn().mockImplementation((id: string) => {
          switch (id) {
            case bar.id:
              return bar;
            case foo.id:
              return foo;
            default:
              return {};
          }
        }),
        list: jest.fn(),
        save: jest.fn(),
        remove: jest.fn()
      };

      const settingRegistry = new SettingRegistry({
        connector
      });

      const translator: ITranslator = {
        load: jest.fn()
      };

      const factory = createToolbarFactory(
        toolbarRegistry,
        settingRegistry,
        factoryName,
        pluginId,
        translator
      );

      const barPlugin = await settingRegistry.load(bar.id);
      const baseToolbar = JSONExt.deepCopy(
        barPlugin.composite['toolbar'] as any
      );

      let waitForChange = new PromiseDelegate<void>();
      barPlugin.changed.connect(() => {
        if (
          !JSONExt.deepEqual(baseToolbar, barPlugin.composite['toolbar'] as any)
        ) {
          waitForChange.resolve();
        }
      });
      await settingRegistry.load(foo.id);
      await waitForChange.promise;

      const items = factory(new Widget());
      expect(items).toHaveLength(2);
      expect(items.get(0).name).toEqual('cut');
      expect(items.get(1).name).toEqual('insert');
    });

    it('should be callable multiple times', async () => {
      const factoryName = 'dummyFactory';
      const pluginId = 'test-plugin:settings';
      const toolbarRegistry = new ToolbarWidgetRegistry({
        defaultFactory: jest.fn()
      });

      const bar: ISettingRegistry.IPlugin = {
        data: {
          composite: {},
          user: {}
        },
        id: pluginId,
        raw: '{}',
        schema: {
          'jupyter.lab.toolbars': {
            dummyFactory: [
              {
                name: 'insert',
                command: 'notebook:insert-cell-below',
                rank: 20
              },
              { name: 'spacer', type: 'spacer', rank: 100 },
              { name: 'cut', command: 'notebook:cut-cell', rank: 21 },
              {
                name: 'clear-all',
                command: 'notebook:clear-all-cell-outputs',
                rank: 60,
                disabled: true
              }
            ]
          },
          'jupyter.lab.transform': true,
          properties: {
            toolbar: {
              type: 'array'
            }
          },
          type: 'object'
        },
        version: 'test'
      };

      const connector: IDataConnector<
        ISettingRegistry.IPlugin,
        string,
        string,
        string
      > = {
        fetch: jest.fn().mockImplementation((id: string) => {
          switch (id) {
            case bar.id:
              return bar;
            default:
              return {};
          }
        }),
        list: jest.fn(),
        save: jest.fn(),
        remove: jest.fn()
      };

      const settingRegistry = new SettingRegistry({
        connector
      });

      const translator: ITranslator = {
        load: jest.fn()
      };

      const factory = createToolbarFactory(
        toolbarRegistry,
        settingRegistry,
        factoryName,
        pluginId,
        translator
      );

      const factory2 = createToolbarFactory(
        toolbarRegistry,
        settingRegistry,
        factoryName,
        pluginId,
        translator
      );

      await settingRegistry.load(bar.id);

      expect(factory(new Widget())).toHaveLength(3);
      expect(factory2(new Widget())).toHaveLength(3);
    });
  });
});