A lightweight Scala DSL for system testing REST web services

val Jason: Person = ???
val personJson = Json.stringify(Jason)
val EmptyList = List[Person]()

using(_ url "http://api.rest.org/person") { implicit rb =>
  GET asserting (statusCode is Status.OK, jsonBodyAsList[Person] is EmptyList)
  val id = POST body personJson asserting (statusCode is Status.Created) returning (header("X-Person-Id"))
  GET / id asserting (statusCode is Status.OK, jsonBodyAs[Person] is Jason)
  GET asserting (statusCode is Status.OK, jsonBodyAsList[Person] is Seq(Jason))
  DELETE / id asserting (statusCode is Status.OK)
  GET / id asserting (statusCode is Status.NotFound)
  GET asserting (statusCode is Status.OK, jsonBodyAsList[Person] is EmptyList)
}

I plan for this to be a useful resource for writing REST web service system tests. However my initial focus is learning and documenting the creation of a Scala DSL. The progress on the implementation is slow because I am documenting my understanding of DSLs as I go.

You can follow the progress on my blog:

• The Builder Pattern
• The Builder as the basis for a DSL
• Extracting and asserting on response values
• Grouping common request configuration with the using method
• Integrating RestTest with ScalaTest (planned)
• How to document a DLS (planned)
• How to structure DLS projects (planned)
• Summary of Scala techniques and resources for creating DSLs (planned)

This project is built with gradle. It includes the gradle wrapper which will download gradle and build the project for you (the only prereq is Java).

To download and build RestTest just:

git clone [email protected]:IainHull/resttest.git
cd resttest
./gradlew build

RestTest is licensed under the permissive Apache 2 Open Source License.