Integration testing Nameko microservices

Earlier we looked at testing a service in isolation by spawning a single worker. This is great for unit testing but it is not a viable option for integration testing.

Nameko gives us the ability to test multiple services working in tandem in a single test. Look at the following:

def test_root_http(web_session, web_config, container_factory): 
    web_config['AMQP_URI'] = 'pyamqp://guest:guest@localhost' 
 
    web_server = container_factory(WebServer, web_config) 
    konnichiwa = container_factory(KonnichiwaService, web_config) 
    web_server.start() 
    konnichiwa.start() 
 
    result = web_session.get('/') 
 
    assert result.text == 'Konnichiwa!' 

As you can see in the preceding code, Nameko also gives us access to the following test fixtures:

• web_session: Gives us a session in which to make HTTP requests to the service
• web_config: Allows us to access the configuration for the service (outside of testing, this is equivalent to the config.yaml file...