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Tricks and Tipps

check java compiler for the n00bs

Adding sourceSets

too simple (wink)

Adding expanding SourceSets

see discussion in

apply plugin: 'java'

// apply the runtimeClasspath from "test" sourceSet to the new one
// to include any needed assets: test, main, test-dependencies and main-dependencies
sourceSets {
    integrationTest {
        // not necessary but nice for IDEa's

        compileClasspath += sourceSets.test.runtimeClasspath
        // somehow this redeclaration is needed, but should be irrelevant
        // since runtimeClasspath always expands compileClasspath
        runtimeClasspath += sourceSets.test.runtimeClasspath

// define custom test task for running integration tests
task integrationTest(type: Test) {
    testClassesDir = sourceSets.integrationTest.output.classesDir
    classpath = sourceSets.integrationTest.runtimeClasspath
integrationTest.dependsOn test


I'm still not sure, it's 100% correct ... I expect there are side effects of this solution

Expanding (test) SourceSets in Multi-Project configuration


  • have a multi-project gradle configuration
  • have a some sort "library"
  • can include the "library" in your other subproject by simply add this dependency:

    dependencies {
      compile project(':library-subproject-name')

    which automatically adds the compileOutput from this project library to your project

  • can't use the same bechanism for testCompile, so this won't work:

    dependencies {
      testCompile project(path: ':library-subproject-name', configuration: 'testCompile')

    but just adds all dependencies from library-subproject-name.testCompile to your testCompile, missing the testOutput / classes themself.
    so: you can't define some sort of "base test classes" or "JUnit Categories"


Reading you might think, compile project(':library-subproject-name') is the same as compile … configuration: 'default') i.e. … configuration: 'runtime'

So: testCompile … configuration: 'testCompile' or even testCompile … configuration: 'testRuntime' should do the same.

And you're totally right!

Except the fact: testCompile doesn't provide an artifact so you just get the dependencies on test* but not test* artifact itself!!!


This is where some tricks come in:

referring to:

Open Problems

Open Questions



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