Tested on Java LTS versions from 8 to 21.

Tested on Gradle versions from 6.0 to 8.8-rc-1.

name.remal.test-source-sets plugin

A Gradle plugin that provides testSourceSets extension for creating new source sets for testing. For all created source sets a Test task is created. All dependencies are inherited from test source set.

testSourceSets extension

testSourceSets extension is very similar to sourceSet extension on Gradle Java plugin. It can be used in exactly the same way. A new source set integrationTest for integration tests can be defined like this:

testSourceSets {
  integrationTest
}

After executing it, sourceSets will contain these source sets:

• main
• test
• integrationTest (this source set is added here, because creation of test source sets is done by delegating it to sourceSet extension)

And testSourceSets will contain these source sets:

• test
• integrationTest

Test source sets configurations

All configurations of test source sets extend corresponding configurations of test source set.

So, after defining integrationTest test source set:

testSourceSets {
  integrationTest
}

... you'll get these configurations:

• integrationTestCompileOnly (extends testCompileOnly)
• integrationTestImplementation (extends testImplementation)
• integrationTestRuntimeOnly (extends testRuntimeOnly)
• And so on. You can find all source set configurations by search for get*ConfigurationName() methods of SourceSet.

Test tasks creation

Test task is created by the plugin for each test source set.

These Test tasks do not inherit main test task settings, so you need to configure it explicitly, or by using withType():

tasks.withType(Test).configureEach {
  useJUnitPlatform()
}

Integration with JVM Test Suite plugin

Starting from Gradle 7.3, this plugin applies JVM Test Suite plugin.

Creating a new test source set, creates a new JVM test suite.

Test source set name suffix check

Gradle authors believe that it's important to distinguish test sources from production sources. So, it's expected that a source set for tests ends with Test. See an issue about naming.

JVM Test Suite plugin creates a Test task named the same, as the corresponding test source set. So, by having integration test source set, we'll have integration Test task. Which is confusing.

This plugin checks that all test source set names end with Test. By default, an exception is thrown if it's not so.

This check can be configured:

testSourceSets {
  testSuffixCheck = 'FAIL' // to throw an exception, default
  testSuffixCheck = 'WARN' // to log a warning message
  testSuffixCheck = 'DISABLE' // to disable the check
}

allTests task

A task named allTests is created by the plugin. This task simply depends on Test task of each test source set.

testTask extension for all test source sets

Every test source set (including default test) has testTask extension. This extension has type TaskProvider<Test> and it's a provider of corresponding Test task for the current test source set.

It can be used like this:

testSourceSets.configureEach {
  println testTask.name // prints corresponding name of `Test` task for this source set
}

Kotlin specifics

Internal members of main source set are accessible in all test source sets. It works for Kotlin Gradle plugin >=1.3.60. The way it's done is described here.

name.remal.integration-tests plugin

A Gradle plugin that applies name.remal.test-source-sets plugin and creates integrationTest test source set.

Migration guide

Version 3.* to 4.*

testTaskName convention property is not added anymore to each test source set. Test tasks now have their names equal to test source set names.

name.remal.integration-tests plugin creates integrationTest test source set instead of integration.

Version 2.* to 3.*

Package name was changed from name.remal.gradleplugins.testsourcesets to name.remal.gradle_plugins.test_source_sets.