Recently I've been using Groovy/Spock for these integration tests, here's how for a really simple web service. In this example it's been built with Spring Boot.
Let's not go into the details of how Spring boot work but it is essentially the same application as in Spring's guide.
The web application has a single path: /exampleendpoint which takes in a single query param: input and returns a JSON object with a single field payload with the value: Something really important: with the input appended.
I want to test that the web service takes in HTTP, takes the query parameter out and builds the JSON correctly. With Groovy/Spock/HTTPBuilder here's how it looks:
Let's look at what is going on here:
- In the setup phase we create a RESTClient
- In the exercising phase we make a call out to the web application.
- In the verification phase we check that the response code is 200, the content type is "application/json" and the body is JSON with a single payload field that contains "Something really important: Get a hair cut"
- The HTTP libraries are easier to use with less code
- The assertions are more expressive
- More magic, for instance the second with() block works on a Groovy map that has automagically created
The above example doesn't deal with how to start and stop the web service under test, I left that out as it is very web framework specific.
What do you need in your build to get this setup? I used Gradle for this example so it is probably easier to just check out the build.gradle, a lot of it can be ignored as it is related to Spring Boot rather than Spock. Here are the important bits:
And the dependencies:
The entire project is here. Happy testing.