dir.file("build$scriptLanguage.extension") << dummyTaskIn(scriptLanguage)
            dir.file("buildSrc", "build$scriptLanguage.extension") << dummyTaskIn(scriptLanguage)
            dir.file("buildSrc", "a", "build$scriptLanguage.extension") << dummyTaskIn(scriptLanguage)
            dir.file("buildSrc", "b").mkdir()

    fun fileSystemEntryObserved(file: File, consumer: String?)

    fun directoryChildrenObserved(directory: File, consumer: String?)

    public InputFingerprinter getInputFingerprinter() {
        return inputFingerprinter;
    }

    private static File getOutputDir(File workspace) {
        return new File(workspace, "transformed");
    }

    private static File getResultsFile(File workspace) {
        return new File(workspace, "results.bin");
    }

    @Override
    public ExecutionBehavior getExecutionBehavior() {

                from = listOf(
                    File("init.gradle.kts") to TestHashCodes.hashCodeFrom(1),
                    File("unchanged.gradle.kts") to TestHashCodes.hashCodeFrom(1)
                ),
                to = listOf(
                    File("init.gradle.kts") to TestHashCodes.hashCodeFrom(2),
                    File("unchanged.gradle.kts") to TestHashCodes.hashCodeFrom(1)
                )

        outputContains 'fis = fis-file'
        outputContains 'fis = fis-abs'

        and:
        problems.assertResultHasProblems(result) {
            withInput "Build file 'build.gradle': file 'provider.txt'"
            withInput "Build file 'build.gradle': file 'fis-path.txt'"
            withInput "Build file 'build.gradle': file 'fis-file.txt'"
            withInput "Build file 'build.gradle': file 'fis-abs.txt'"
        }

import org.gradle.api.internal.file.FileCollectionInternal
import org.gradle.api.internal.file.FileCollectionStructureVisitor
import org.gradle.api.internal.file.FileTreeInternal
import org.gradle.api.internal.file.FilteredFileCollection
import org.gradle.api.internal.file.SubtractingFileCollection
import org.gradle.api.internal.file.collections.FailingFileCollection

                public static Process execute(String[] command) { return null; }
                public static Process execute(String[] command, String[] envp, File file) { return null; }
                public static Process execute(String[] command, List<?> envp, File file) { return null; }
                public static Process execute(List<?> command) { return null; }

                outputFile.set(layout.buildDirectory.file("consumer-output.txt"))
            }
        '''

        and:
        file('producer-input.txt').text = '42'

        when:
        configurationCacheRun 'consumer'

        then:
        configurationCache.assertStateStored(true)

        and:
        file('build/consumer-output.txt').text == '42'

        given:
        TestFile buildLogicInput = file('input.txt').tap {
            text = 'foo!'
        }
        TestFile initScript = file('initscript.gradle').tap {
            text = """
                // TODO: replace by public API
                def providers = gradle.services.get(ProviderFactory)
                def fileFactory = gradle.services.get(org.gradle.api.internal.file.FileFactory)

            cacheKeyStringFromStartParameter {
                includeBuild(file("included"))
            },
            equalTo(
                cacheKeyStringFromStartParameter {
                    includeBuild(file("included"))
                }
            )
        )
        assertThat(
            cacheKeyStringFromStartParameter {
                includeBuild(file("included"))
            },