return when (checkFileUpToDateStatus(file, hash)) {
                    FileUpToDateStatus.ContentsChanged -> "file '${displayNameOf(file)}' has changed"
                    FileUpToDateStatus.Removed -> "file '${displayNameOf(file)}' has been removed"
                    FileUpToDateStatus.TypeChanged -> "file '${displayNameOf(file)}' has been replaced by a directory"
                    FileUpToDateStatus.Unchanged -> null
                }

                    on { displayNameOf(scriptFile) } doReturn "displayNameOf(scriptFile)"
                },
                ConfigurationCacheFingerprint.InputFile(
                    scriptFile,
                    TestHashCodes.hashCodeFrom(2)
                )
            ),
            equalTo("file 'displayNameOf(scriptFile)' has changed")
        )
    }

    @Test

        reportInput(consumer, null) {
            text("file ")
            reference(host.displayNameOf(file))
        }
    }

    private
    fun reportDirectoryContentInput(directory: File, consumer: String?) {
        reportInput(consumer, null) {
            text("directory content ")
            reference(host.displayNameOf(directory))
        }
    }

    private

            fileSystemAccess.read(file.absolutePath).hash

        override fun hashCodeOfDirectoryChildrenNames(file: File): HashCode = directoryChildrenNamesHash(file)

        override fun displayNameOf(file: File): String =
            GFileUtils.relativePathOf(file, rootDirectory)

        override fun fingerprintOf(fileCollection: FileCollectionInternal): HashCode =