react-native-navigation/lib/src/components/Lifecycle.test.ts

import { Lifecycle } from './Lifecycle';
import { Store } from '../components/Store';

describe('Lifecycle', () => {
  let store;
  let uut;
  let mockRef;

  beforeEach(() => {
    mockRef = {
      didAppear: jest.fn(),
      didDisappear: jest.fn(),
      onNavigationButtonPressed: jest.fn()
    };
    store = new Store();
    store.setRefForComponentId('myUniqueId', mockRef);

    uut = new Lifecycle(store);
  });

  describe('componentDidAppear', () => {
    it('calls didAppear on component ref from store', () => {
      uut.componentDidAppear('myUniqueId');
      expect(mockRef.didAppear).toHaveBeenCalledTimes(1);
    });

    it('skips undefined refs', () => {
      uut.componentDidAppear('myUniqueId2');
      expect(mockRef.didAppear).not.toHaveBeenCalled();
    });

    it('skips unimplemented didAppear', () => {
      mockRef = {};
      expect(mockRef.didAppear).toBeUndefined();
      store.setRefForComponentId('myUniqueId', mockRef);
      uut.componentDidAppear('myUniqueId');
    });
  });

  describe('componentDidDisappear', () => {
    it('calls didDisappear on component ref from store', () => {
      uut.componentDidDisappear('myUniqueId');
      expect(mockRef.didDisappear).toHaveBeenCalledTimes(1);
    });

    it('skips undefined refs', () => {
      uut.componentDidDisappear('myUniqueId2');
      expect(mockRef.didDisappear).not.toHaveBeenCalled();
    });

    it('skips unimplemented didDisappear', () => {
      mockRef = {};
      expect(mockRef.didDisappear).toBeUndefined();
      store.setRefForComponentId('myUniqueId', mockRef);
      uut.componentDidDisappear('myUniqueId');
    });
  });

  describe('onNavigationButtonPressed', () => {
    it('calls onNavigationButtonPressed on component ref from store', () => {
      uut.onNavigationButtonPressed({
        componentId: 'myUniqueId',
        buttonId: 'myButtonId'
      });
      expect(mockRef.onNavigationButtonPressed).toHaveBeenCalledTimes(1);
    });

    it('skips undefined refs', () => {
      uut.onNavigationButtonPressed('myButtonId');
      expect(mockRef.didDisappear).not.toHaveBeenCalled();
    });

    it('skips unimplemented onNavigationButtonPressed', () => {
      mockRef = {};
      expect(mockRef.onNavigationButtonPressed).toBeUndefined();
      store.setRefForComponentId('myUniqueId', mockRef);
      uut.componentDidAppear('myUniqueId');
    });
  });
});