}

    public File createFile(File dir, String filename, String contents, String encoding) throws IOException {
        File file = new File(dir, filename);

        file.getParentFile().mkdirs();

        FileUtils.fileWrite(file.getPath(), encoding, contents);

        markForDeletion(file);

        return file;
    }

    public String getFileContents(File file, String encoding) throws IOException {

        file('build/distributions/TestProject-foo.tar').assertIsFile()
        file('build/distributions/custom-bar.tar').assertIsFile()
        file('build/distributions/custom-baz.tar').assertIsFile()

        file('build/install/TestProject-foo').assertIsDir()
        file('build/install/custom-bar').assertIsDir()
        file('build/install/custom-baz').assertIsDir()
    }

    def "can unpack a ZIP file with #dsl dsl"() {
        given:
        def dslDir = sample.dir.file(dsl)
        executer.inDirectory(dslDir)

        when:
        succeeds("unpackFiles")

        then:
        def outputDir = dslDir.file("build/resources")
        outputDir.file("libs/first.txt").isFile()
        outputDir.file("libs/other.txt").isFile()
        outputDir.file("docs.txt").isFile()

        where:

        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"))

    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")