def file3 = dir2.createFile("other/file3")
        def dir3 = projectDir.file("missing")

        expect:
        def dirVar = factory.newDirectoryProperty()
        def tree = dirVar.asFileTree

        dirVar.set(dir1)
        tree.files == [file1, file2] as Set

        dirVar.set(dir2)
        tree.files == [file3] as Set

        dirVar.set(dir3)
        tree.files == [] as Set

    @get:SkipWhenEmpty
    @get:PathSensitive(PathSensitivity.NONE)
    @get:InputFiles
    val performanceResults: FileTree
        get() = performanceResultsDirectory.asFileTree.matching { include("**/*.json") }

    @get:OutputDirectory
    abstract val reportDir: DirectoryProperty

    @get:Optional
    @get:Input
    val databaseUrl: Provider<String>

        TestFile missing = testDir.file("f3")
        testDir.file("f2").createFile()
        testDir.file("ignored1").createFile()
        def collection = containing(file1, dir1, missing)
        def tree = collection.asFileTree

        expect:
        assertSetContainsForFileSet(tree, toSet("f1", "f2", "subdir/f2"))
        assertSetContainsForMatchingTask(tree, toSet("f1", "f2", "subdir/f2"))
    }

        def file3 = dir2.createFile("other/file3")

        expect:
        def tree1 = layout.projectDirectory.dir("dir1").asFileTree
        tree1.files == [file1, file2] as Set

        def tree2 = layout.projectDirectory.dir("dir2").asFileTree
        tree2.files == [file3] as Set
    }

    def "can query and mutate the build directory using resolvable type"() {
        expect:

}


/**
 * Clean up daemon log files produced in integration tests.
 */
fun FileSystemOperations.removeDaemonLogFiles(dir: Directory) {
    if (dir.asFile.isDirectory) {
        val daemonLogFiles = dir.asFileTree.matching {
            include("**/*.log")
        }
        delete { delete(daemonLogFiles) }
    }

    components {
        withModule<CodeNarcRule>("org.codenarc:CodeNarc") {
            params(groovyVersion)
        }
    }
}

fun configFile(fileName: String) = resources.text.fromFile(rules.asFileTree.filter { it.name == fileName })

checkstyle {
    toolVersion = "8.12"
    config = configFile("checkstyle.xml")
    val projectDirectory = layout.projectDirectory
    configDirectory = rules.elements.map {

                .replaceAll("[^a-zA-Z0-9\\-]", "_")
                .toLowerCase(Locale.ROOT) + ".2";
    }

    private File unpack(File jdkArchive) {
        final FileTree fileTree = asFileTree(jdkArchive);
        String unpackFolderName = getNameWithoutExtension(jdkArchive);
        final File unpackFolder = temporaryFileProvider.createTemporaryDirectory(unpackFolderName, null, "jdks");

                writeText(readText().replace("\\Q<lastUpdated>\\E\\d+\\Q</lastUpdated>\\E".toRegex(), "<lastUpdated>${Year.now().value}0101000000</lastUpdated>"))
            }
            localRepository.get().asFileTree.matching { include("**/*.module") }.forEach {
                val content = it.readText()
                    .replace("\"buildId\":\\s+\"\\w+\"".toRegex(), "\"buildId\": \"\"")

        expect:
        def collection = FileCollectionFactory.empty()
        emptyCollection(collection)
        collection.toString() == "file collection"

        def tree = collection.asFileTree
        emptyTree(tree)
        tree.toString() == "file tree"
    }

    def "constructs empty collection with display name"() {
        expect:

        assertEmptyTree(singleFileTree.matching { exclude(file.name) })

        when:
        def fromConfigurableFiles = TestFiles.fileOperations(tempDir).configurableFiles(file).asFileTree

        then:
        assertSingleFileTree(fromConfigurableFiles)
        assertSingleFileTree(fromConfigurableFiles.matching { include(file.name) })