hashFile(file, Hashing.sha1())
    }

    TestFile getSha256File(TestFile file) {
        getHashFile(file, Hashing.sha256())
    }

    TestFile sha256File(TestFile file) {
        hashFile(file, Hashing.sha256())
    }

    TestFile getSha512File(TestFile file) {
        getHashFile(file, Hashing.sha512())
    }

    TestFile sha512File(TestFile file) {

        outputDir.file('index-staging.html').assertDoesNotExist()
        outputDir.file('index.html.tmp').assertDoesNotExist()
        outputDir.file('home.html').isFile()
        outputDir.file('logo.png').isFile()
        outputDir.file('products/collaboration.jpg').isFile()
        outputDir.file('WEB-INF/classes/Hello.class').isFile()
        outputDir.file('WEB-INF/lib/commons-io-2.6.jar').isFile()

        excluded file('1')
        excluded file('c')
        excluded file('3')
        excluded file('acb')
        excluded file('acd')
        excluded file('132')
        excluded file('132')

        when:
        patternSet = new PatternSet().copyFrom(patternSet)
        then:
        included file('ac')
        included file('13')
        excluded file('a')
        excluded file('1')

    }

    private File fileInTransactionDir(String path) {
        return new File(checkNotNull(transactionDir), path)
    }

    private File file(String path) {
        return new File(checkNotNull(temporaryFolder) as File, path)
    }

    private File createNewDirectory(File file) {
        file.parentFile.mkdirs()
        file.mkdir()
        return file
    }

        createFile(new File(cachesDir, "8.7-rc-4/transforms/first/metadata.bin"))
        createFile(new File(cachesDir, "8.7-rc-4/transforms/first/transformed/instrumented/file"))
        createFile(new File(cachesDir, "8.7-rc-4/transforms/second/transformed/original/file"))
        createFile(new File(cachesDir, "8.8/transforms/first/transformed/instrumented/file"))
        createFile(new File(cachesDir, "8.8/transforms/first/transformed/original/file"))

                inputDir = file("inputs")
                nonIncrementalInput = file("nonIncremental")
            }
        """
        file("nonIncremental").text = "input"
        run("withNonIncrementalInput")

        when:
        file("inputs/new-input-file.txt") << "new file"
        file("nonIncremental").text = 'changed'
        then:

    private File inputDir
    private File outputDir

    @InputDirectory
    public File getInputDir() {
        return inputDir
    }

    public void setInputDir(File inputDir) {
        this.inputDir = inputDir
    }

    @OutputDirectory
    public File getOutputDir() {
        return outputDir
    }

    public void setOutputDir(File outputDir) {

        File file = new File("f1")
        TestFileCollection collection = new TestFileCollection(file)

        expect:
        collection as Collection == toList(file)
        collection as Set == toLinkedSet(file)
        collection as List == toList(file)
    }

    void toFileTreeReturnsSingletonTreeForEachFileInCollection() {
        File file = testDir.createFile("f1")

   *
   * <p><b>Warning:</b> If {@code to} represents an existing file, that file will be overwritten
   * with the contents of {@code from}. If {@code to} and {@code from} refer to the <i>same</i>
   * file, the contents of that file will be deleted.
   *
   * <p><b>{@link java.nio.file.Path} equivalent:</b> {@link
   * java.nio.file.Files#copy(java.nio.file.Path, java.nio.file.Path, java.nio.file.CopyOption...)}.

                erroneousSource = indexes: 13..14, line/column: 1/14..1/15, file: test
            )
            UnsupportedConstruct(
                languageFeature = StarImport,
                potentialElementSource = indexes: 15..25, line/column: 2/1..2/11, file: test,
                erroneousSource = indexes: 24..25, line/column: 2/10..2/11, file: test
            )