def "uses source and target compatibility from toolchain defined by forkOptions #forkOption"() {
        def currentJdk = Jvm.current()
        def earlierJdk = AvailableJavaHomes.getDifferentVersion { it.languageVersion < currentJdk.javaVersion }
        assumeNotNull(earlierJdk)

        def path = TextUtil.normaliseFileSeparators(earlierJdk.javaHome.absolutePath.toString() + appendPath)

    def "can compile with a custom compiler executable"() {
        def otherJdk = AvailableJavaHomes.getJdk(JavaVersion.current())
        def jdk = AvailableJavaHomes.getDifferentVersion {
            def v = it.languageVersion.majorVersionNumber
            11 <= v && v <= 18 // Java versions supported by ECJ releases used in the test
        }

        buildFile << """
            plugins {

    def "honors configured Java Toolchain to avoid compiled by a more recent version failure"() {
        disableProblemsApiCheck()
        def currentJdk = Jvm.current()
        def newerJdk = AvailableJavaHomes.getDifferentVersion { it.languageVersion > currentJdk.javaVersion }
        Assume.assumeNotNull(newerJdk)

        def installationPaths = [currentJdk, newerJdk].collect { it.javaHome.absolutePath }.join(",")

        given: