How do you share classes between test configurations using SBT

Question

I have followed the instructions on SBT's documentation for setting up test configurations. I have three test configurations Test, IntegrationTest, and AcceptanceTest. So my src directory looks like this:

• src/
  • acceptance/
    • scala/
  • it/
    • scala/
  • test/
    • scala/

My question is, how can I configure SBT to allow sharing of classes between these configurations? Example: I have a class in the "it" configuration for simplifying database setup and tear down. One of my acceptance tests in the "acceptance" configuration could make use of this class. How do I make that "it" class available to the test in "acceptance"

Many thanks in advance.

Answer 1

A configuration can extend another configuration to use that configuration's dependencies and classes. For example, the custom test configuration section shows this definition for the custom configuration:

lazy val FunTest = config("fun") extend(Test)

The extend part means that the compiled normal test sources will be on the classpath for fun sources. In your case, declare the acceptance configuration to extend the it configuration:

lazy val AcceptanceTest = config("acceptance") extend(IntegrationTest)

Answer 2

In case you want to stick with predefined configurations instead of defining new ones, and since both Test and IntegrationTest extend Runtime (one would expect IntegrationTest to extend Test…), you could use the following:

dependencyClasspath in IntegrationTest := (dependencyClasspath in IntegrationTest).value ++ (exportedProducts in Test).value

This should put all the classes you define in Test on the IntegrationTest classpth.

##EDIT:

I was just became aware to amuch better solution thanks to @mjhoy:

lazy val DeepIntegrationTest = IntegrationTest.extend(Test)