react-native-navigation/lib/module/components/ComponentRegistry.test.js

React Native Navigation - truly native navigation for iOS and Android

"use strict";

import { ComponentRegistry } from "./ComponentRegistry.js";
import { Store } from "./Store.js";
import { mock, instance, verify, anyFunction } from 'ts-mockito';
import { ComponentWrapper } from "./ComponentWrapper.js";
import { ComponentEventsObserver } from "../events/ComponentEventsObserver.js";
import { AppRegistryService } from "../adapters/AppRegistryService.js";
const DummyComponent = () => null;
describe('ComponentRegistry', () => {
  let mockedStore;
  let mockedComponentEventsObserver;
  let mockedComponentWrapper;
  let mockedAppRegistryService;
  let componentWrapper;
  let store;
  let uut;
  beforeEach(() => {
    mockedStore = mock(Store);
    mockedComponentEventsObserver = mock(ComponentEventsObserver);
    mockedComponentWrapper = mock(ComponentWrapper);
    mockedAppRegistryService = mock(AppRegistryService);
    store = instance(mockedStore);
    componentWrapper = instance(mockedComponentWrapper);
    uut = new ComponentRegistry(store, instance(mockedComponentEventsObserver), componentWrapper, instance(mockedAppRegistryService));
  });
  it('registers component by componentName into AppRegistry', () => {
    uut.registerComponent('example.MyComponent.name', () => DummyComponent);
    verify(mockedAppRegistryService.registerComponent('example.MyComponent.name', anyFunction())).called();
  });
  it('saves the wrapper component generator to the store', () => {
    uut.registerComponent('example.MyComponent.name', () => DummyComponent);
    verify(mockedStore.setComponentClassForName('example.MyComponent.name', anyFunction())).called();
  });
  it('should not invoke generator', () => {
    const generator = jest.fn(() => DummyComponent);
    uut.registerComponent('example.MyComponent.name', generator);
    expect(generator).toHaveBeenCalledTimes(0);
  });
  it('should wrap component only once', () => {
    uut = new ComponentRegistry(new Store(), instance(mockedComponentEventsObserver), componentWrapper, instance(mockedAppRegistryService));
    componentWrapper.wrap = jest.fn();
    const generator = jest.fn(() => DummyComponent);
    const componentProvider = uut.registerComponent('example.MyComponent.name', generator);
    componentProvider();
    componentProvider();
    expect(componentWrapper.wrap).toHaveBeenCalledTimes(1);
  });
  it('should recreate wrapped component on re-register component', () => {
    uut = new ComponentRegistry(new Store(), instance(mockedComponentEventsObserver), new ComponentWrapper(), instance(mockedAppRegistryService));
    const generator = () => DummyComponent;
    const w1 = uut.registerComponent('example.MyComponent.name', generator)();
    const w2 = uut.registerComponent('example.MyComponent.name', generator)();
    expect(w1).not.toBe(w2);
  });
});
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