(JavaScript) Jest test example use of toHaveBeenCalledTimes, objectContaining and arrayContaining in AWS Lambda

service.spec.js

  describe('Run method', () => {
    const event: CloudWatchLogsEvent = {
      awslogs: {
        data: '',
      },
    }
    it('should confirm shipments where emitted', async () => {
      expect.assertions(2)
      await service.run(event)
      expect(sendBatchJSONMessages).toHaveBeenCalledTimes(1)
      const expected = expect.objectContaining({
        ExternalOrderId: expect.any(String),
        OrderId: expect.any(String),
      })
      expect(sendBatchJSONMessages).toHaveBeenCalledWith(
        'http://localhost:4576/',
        expect.arrayContaining([expected]),
      )
    })
  })