@defra-fish/sales-api-service/src/services/transactions/__tests__/process-transaction-dlq.spec.js

Rod Licensing Sales API

import { processDlq } from '../process-transaction-dlq.js'
import { retrieveStagedTransaction } from '../retrieve-transaction.js'
import { createStagingExceptionFromError } from '../../exceptions/exceptions.service.js'
import { TRANSACTION_STAGING_TABLE } from '../../../config.js'
import AwsMock from 'aws-sdk'

let mockProcessingException
jest.mock('../process-transaction-queue.js', () => ({
  processQueue: async () => {
    if (mockProcessingException) {
      throw mockProcessingException
    }
  }
}))

jest.mock('../retrieve-transaction.js', () => ({
  retrieveStagedTransaction: jest.fn(async () => ({ testTransaction: true }))
}))

jest.mock('@defra-fish/dynamics-lib', () => ({
  ...jest.requireActual('@defra-fish/dynamics-lib'),
  persist: jest.fn()
}))

jest.mock('../../exceptions/exceptions.service.js')

const expectDynamoDbTtlUpdate = () => {
  expect(AwsMock.DynamoDB.DocumentClient.mockedMethods.update).toBeCalledWith(
    expect.objectContaining({
      TableName: TRANSACTION_STAGING_TABLE.TableName,
      Key: { id: 'test' },
      ConditionExpression: 'attribute_exists(id)',
      UpdateExpression: 'SET expires = :expires',
      ExpressionAttributeValues: {
        ':expires': expect.any(Number)
      }
    })
  )
}

describe('transaction service', () => {
  beforeAll(() => {
    TRANSACTION_STAGING_TABLE.TableName = 'TestTable'
  })
  beforeEach(() => {
    mockProcessingException = new Error('Test error')
    jest.clearAllMocks()
    AwsMock.__resetAll()
  })

  describe('processDlq', () => {
    it('does not raise a staging exception if the processQueue retry attempt succeeds', async () => {
      mockProcessingException = null
      await processDlq({ id: 'test' })
      expect(createStagingExceptionFromError).not.toBeCalled()
      expect(AwsMock.DynamoDB.DocumentClient.mockedMethods.update).not.toBeCalled()
    })

    it('creates a staging exception if the retry attempt is not successful', async () => {
      await processDlq({ id: 'test' })
      expect(createStagingExceptionFromError).toBeCalledWith('test', mockProcessingException, { testTransaction: true })
      expectDynamoDbTtlUpdate()
    })

    it('handles exceptions originating DynamoDB', async () => {
      const testDynamoDbException = new Error('DynamoDB error')
      retrieveStagedTransaction.mockRejectedValueOnce(testDynamoDbException)
      await processDlq({ id: 'test' })
      expect(createStagingExceptionFromError).toBeCalledWith('test', testDynamoDbException, null)
      expect(AwsMock.DynamoDB.DocumentClient.mockedMethods.update).not.toHaveBeenCalled()
    })

    it('logs an exception if unable to update the TTL on the transaction in DynamoDB', async () => {
      const consoleErrorSpy = jest.spyOn(console, 'error').mockImplementation(() => {})
      AwsMock.DynamoDB.DocumentClient.__throwWithErrorOn('update')
      await processDlq({ id: 'test' })
      expect(createStagingExceptionFromError).toBeCalledWith('test', mockProcessingException, { testTransaction: true })
      expectDynamoDbTtlUpdate()
      expect(consoleErrorSpy).toHaveBeenCalled()
    })
  })
})