}

            task functionalTest(type: Test) {
                useJUnitPlatform()
                testClassesDirs = sourceSets.functionalTest.output.classesDirs
                classpath = sourceSets.functionalTest.runtimeClasspath
            }

            gradlePlugin {
                testSourceSets sourceSets.functionalTest
            }
        """

                id("java-base")
            }

            sourceSets {
                sources
            }

            task verify {
                assert sourceSets.sources.output.classesDirs instanceof ConfigurableFileCollection
            }
        """

        expect:
        succeeds "verify"
    }

        }
    }

    fun SmokeTest.configureForSmokeTest(remoteProjectOutputFiles: Any? = null) {
        group = "Verification"
        testClassesDirs = smokeTestSourceSet.output.classesDirs
        classpath = smokeTestSourceSet.runtimeClasspath
        maxParallelForks = 1 // those tests are pretty expensive, we shouldn't execute them concurrently

            task test2(type: Test) {
                ${configureTestFramework}
                classpath = sourceSets.test2.runtimeClasspath
                testClassesDirs = sourceSets.test2.output.classesDirs
            }

            check {
                dependsOn test2
            }

            dependencies {
                ${getTestFrameworkDependencies('test')}

                b.propertyAssignment(null, "testClassesDirs", buildScriptBuilder.propertyExpression(functionalTestSourceSet, "output.classesDirs"), true);
                b.propertyAssignment(null, "classpath", buildScriptBuilder.propertyExpression(functionalTestSourceSet, "runtimeClasspath"), true);
                b.methodInvocation(null, "useJUnitPlatform");

 *   }
 * }
 * </pre>
 *
 * Working with generated resources.
 * <p>
 * In general, we recommend generating resources into folders different than the regular resourcesDir and classesDirs.
 * Usually, it makes the build easier to understand and maintain. Also it gives some additional benefits
 * because other Gradle plugins can take advantage of the output dirs 'registered' in the SourceSet.output.

                destinationDirectory = file("build/classes/custom")
                classpath = files()
            }

            sourceSets.main.output.classesDirs.from(taskProvider.flatMap(it -> it.getDestinationDirectory()))
        """
        file("src/custom/java/com/example/Example.java") << """
            package com.example;
            public class Example {}

They can be defined by plugins or inline:

[.multi-language-sample]
=====
[source, kotlin]
----
val functionalTest by tasks.registering(Test::class) {
    testClassesDirs = functionalTestSourceSet.output.classesDirs
    classpath = functionalTestSourceSet.runtimeClasspath
    useJUnitPlatform()
}

tasks.named<Test>("test") {
    // Use JUnit Jupiter for unit tests.
    useJUnitPlatform()
}
----
=====

                    }
                }
            }

            task functionalTest(type: Test) {
                testClassesDirs = sourceSets.functionalTest.output.classesDirs
                classpath = sourceSets.functionalTest.runtimeClasspath
            }

            check.dependsOn functionalTest

            gradlePlugin {
                pluginSourceSet sourceSets.custom

    fun Project.createGeneratePerformanceDefinitionJsonTask(name: String, performanceSourceSet: SourceSet, outputJson: File) =
        tasks.register<Test>(name) {
            testClassesDirs = performanceSourceSet.output.classesDirs
            classpath = performanceSourceSet.runtimeClasspath
            maxParallelForks = 1
            systemProperty("org.gradle.performance.scenario.json", outputJson.absolutePath)