then:
        executedAndNotSkipped getLibraryCompileTask(language)
        executedAndNotSkipped getAppCompileTask(language)

        when:
        buildFile << """
            subprojects {
                tasks.compileJava.options.incremental = $to
            }
        """
        run getAppCompileTask(language)

        then:
        skipped getLibraryCompileTask(language)

    }

    String getAppCompileTask(CompiledLanguage language = CompiledLanguage.JAVA) {
        ":app:${language.compileTaskName}"
    }

    String getLibraryCompileTask(CompiledLanguage language = CompiledLanguage.JAVA) {
        ":library:${language.compileTaskName}"
    }

    TestFile writeUnusedLibraryClass(CompiledLanguage language = CompiledLanguage.JAVA) {