when:
        configurationCacheRun "build"

        then:
        configurationCache.assertStateStored()
        result.assertTasksExecuted(*expectedTasks)

        and:
        classFile.isFile()
        testClassFile.isFile()
        testResults.isDirectory()

        and:
        assertTestsExecuted("ThingTest", "ok")

        when:
        configurationCacheRun "clean"

        and:

    }
}


internal
fun Encoder.writeDefaultClassPath(classPath: ClassPath) {
    writeCollection(classPath.asFiles) {
        writeFile(it)
    }
}


internal
fun Encoder.writeTransformedClassPath(classPath: TransformedClassPath) {
    writeCollection(classPath.asFiles.zip(classPath.asTransformedFiles)) {
        writeFile(it.first)
        writeFile(it.second)
    }
}


internal

interface IgnoredConfigurationInputs {
    /**
     * Checks if the [file] should be excluded from the configuration inputs fingerprint if it participates
     * in file system checks, such as [File.exists], [File.isFile] etc.
     */
    fun isFileSystemCheckIgnoredFor(file: File): Boolean

    inner class ReadableConfigurationCacheStateFile(
        private val file: File,
        override val stateType: StateType
    ) : ConfigurationCacheStateFile {
        override val exists: Boolean
            get() = file.isFile

        override val stateFile: StateFile
            get() = StateFile(stateType, file)

        override fun outputStream(): OutputStream =
            throw UnsupportedOperationException()

}


/**
 * Gives direct access to system resources.
 */
open class DefaultEnvironment : Environment {

    override fun propertiesFile(propertiesFile: File): Map<String, String>? = when {
        propertiesFile.isFile -> GUtil.loadProperties(propertiesFile).uncheckedCast()
        else -> null
    }

    override fun getSystemProperties(): Environment.Properties =
        DefaultProperties(System.getProperties().uncheckedCast())

        }
    }

    static FileCheck fileExists(String filePath) {
        new FileCheck(filePath, "exists")
    }

    static FileCheck fileIsFile(String filePath) {
        new FileCheck(filePath, "isFile")
    }

    static FileCheck fileIsDirectory(String filePath) {
        new FileCheck(filePath, "isDirectory")
    }

    static UndeclaredFileAccess directoryContent(String directoryPath) {