Testing

Mia service Node.js Library is built on Fastify and therefore integrates with testing tools made available by the framework. A complete example of this type of test is available here.

CustomPlugin directly expose getDirectServiceProxy and getServiceProxy for testing purpose. Ypu can import the function in you test in ths way:

const { getDirectServiceProxy } = require('@mia-platform/custom-plugin-lib') 
const { getServiceProxy } = require('@mia-platform/custom-plugin-lib') 

const myServiceProxy = getDirectServiceProxy(serviceName,options)
const myServiceProxy = getServiceProxy(options)

Integration and Unit test

The testing of service can be performed at multiple levels of abstraction. One possibility is to use a technique called fake http injection for which it is possible to simulate receiving an HTTP request. In this way, all the service logic is exercised from the HTTP layer to the handlers. This pattern is an example of Integration Testing.

Example Integration Test

In the example below the test framework Mocha.

'use strict'

const assert = require('assert')
const fastify = require('fastify')

const customPlugin = require('@mia-platform/custom-plugin-lib')()
const index = customPlugin(async service => {
  service.addRawCustomPlugin(
    'GET',
    '/status/alive',
    async (request, reply) => ({
      status: 'ok'
    })
  )
})

const createTestServer = () => {
  // Silent => trace for enabling logs
  const createdServer = fastify({ logger: { level: 'silent' } })
  
  createdServer.register(index)
  return createdServer
}

describe('/status/alive', () => {
  it('should be available', async () => {
    const server = createTestServer()

    const response = await server.inject({
      url: '/status/alive',
    })

    assert.equal(response.statusCode, 200)
  })
})