deskreen/app/features/ConnectedDevicesService/index.spec.ts

import ConnectedDevicesService, { nullDevice } from '.';

jest.useFakeTimers();

const testDevice = {
  id: '112112112',
  sharingSessionID: '12332',
  deviceOS: '4123',
  deviceType: '43',
  deviceIP: '1234',
  deviceBrowser: '41234',
  deviceScreenWidth: 200,
  deviceScreenHeight: 300,
};

describe('ConnectedDevicesService tests', () => {
  let service: ConnectedDevicesService;

  beforeEach(() => {
    jest.clearAllMocks();
    jest.restoreAllMocks();

    service = new ConnectedDevicesService();
  });

  describe('when ConnectedDevicesService created properly', () => {
    describe('when .resetPendingConnectionDevice() was called', () => {
      it('should set .pendingConnectionDevice to nullDevice', () => {
        service.pendingConnectionDevice = testDevice;
        service.resetPendingConnectionDevice();

        expect(service.pendingConnectionDevice).toBe(nullDevice);
      });
    });

    describe('when .getDevices() was called', () => {
      it('should return .devices array', () => {
        const res = service.getDevices();

        expect(res).toBe(service.devices);
      });
    });

    describe('when .removeAllDevices() was called', () => {
      it('should make .devices array empty', () => {
        service.devices.push(testDevice);

        service.disconnectAllDevices();

        expect(service.devices.length).toBe(0);
      });
    });

    describe('when .removeDeviceByID() was called', () => {
      it('should remove appropriate device from .devices array', async () => {
        const testDevice2 = (JSON.parse(
          JSON.stringify(testDevice)
        ) as unknown) as Device;
        service.devices.push(testDevice);
        service.devices.push(testDevice2);

        await service.disconnectDeviceByID(testDevice.id);

        let isStillInArray = false;
        service.devices.forEach((d) => {
          if (d.id === testDevice.id) {
            isStillInArray = true;
          }
        });
        expect(isStillInArray).toBe(false);
      });
    });

    describe('when .addDevice() was called', () => {
      it('should add device to .devices array', () => {
        service.addDevice(testDevice);

        let isInArray = false;
        service.devices.forEach((d) => {
          if (d.id === testDevice.id) {
            isInArray = true;
          }
        });
        expect(isInArray).toBe(true);
      });
    });
  });
});