import org.gradle.integtests.fixtures.CompiledLanguage
import org.gradle.test.fixtures.file.TestFile

@SelfType(AbstractIntegrationSpec)
trait IncrementalCompileMultiProjectTestFixture {
    TestFile libraryAppProjectWithIncrementalCompilation(CompiledLanguage language = CompiledLanguage.JAVA) {
        multiProjectBuild('incremental', ['library', 'app'], language) {
            buildFile << """
                subprojects {

    }

    def "task outcome is UP-TO-DATE when no recompilation necessary"() {
        given:
        libraryAppProjectWithIncrementalCompilation(language)

        when:
        succeeds getAppCompileTask(language)

        then:
        executedAndNotSkipped getAppCompileTask(language)

        when:

            }
        """.stripIndent()
        }
    }

    def "up-to-date incremental compilation is cached if nothing to recompile"() {
        given:
        buildFile.text = ""
        libraryAppProjectWithIncrementalCompilation()

        when:
        withBuildCache().run appCompileTask

        then:
        executedAndNotSkipped appCompileTask

        when:
        writeUnusedLibraryClass()

        and: