_ * a.outputDirectory >> file("inputDir")
        def projectB = project(project, "b")
        Task b = task("b", project: projectB, type: AsyncWithDestroysFile)
        _ * b.destroysFile >> file("inputDir")
        def projectC = project(project, "c")
        Task c = task("c", project: projectC, type: AsyncWithInputDirectory, dependsOn: [a])
        _ * c.inputDirectory >> file("inputDir")

import org.gradle.api.tasks.*

public class DirTransformerTask extends DefaultTask {
    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
    }

                inputDir = project.layout.buildDirectory.dir("root")
                outputFile = project.layout.buildDirectory.file("output.txt")
            }
        """)

        when:
        executer.withStackTraceChecksDisabled()
        runAndFail "consumer"
        then:
        failure.assertHasDocumentedCause("Cannot access input property 'inputDir' of task ':consumer'. " +

                sources.set(file("inputDir"))
                outputFile.set(file("build/outputFile.txt"))
                ${ api == Api.RUNTIME_API
                    ? "inputs.dir(sources).withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName('sources')"
                    : "" }
            }
        """
        def inputDir = file("inputDir").createDir()
        inputDir.createDir("some/empty/sub-directory")

        }
    }

    public static class TaskWithInputDir extends TaskWithAction {
        File inputDir;

        @Inject
        public TaskWithInputDir(File inputDir) {
            this.inputDir = inputDir;
        }

        @InputDirectory
        public File getInputDir() {
            return inputDir;
        }
    }

    public static class TaskWithInput extends TaskWithAction {

                final DirectoryProperty inputDir = project.objects.directoryProperty()
                @OutputFile
                final RegularFileProperty outputFile = project.objects.fileProperty()

                @TaskAction
                void go() {
                    def file = outputFile.asFile.get()
                    file.text = inputDir.asFile.get().listFiles()*.text.join(',')
                }

    final inputFile = temporaryFolder.createFile("input-file")
    final inputDir = temporaryFolder.createDir("input-dir")
    final inputDirFile = inputDir.file("input-file2").createFile()
    final missingInputFile = temporaryFolder.file("missing-input-file")
    final inputFiles = [file: [inputFile], dir: [inputDir], missingFile: [missingInputFile]]
    final outputFiles = [file: outputFile, missingFile: missingOutputFile]

        buildFile << """
            task test(type: TaskWithNestedObjectProperty) {
                input = "someString"
                bean = new NestedProperty(
                    inputDir: file('input'),
                    input: 'someString',
                    outputDir: file("\$buildDir/output"),
                    nestedBean: new AnotherNestedProperty(inputFile: file('inputFile'))
                )

        1 * visitor.visitInputProperty('bean.nestedInput', { it.call() == 'nested' }, false)
        1 * visitor.visitInputFileProperty('bean.inputDir', _, _, _, _, _, _, InputFilePropertyType.DIRECTORY)

        1 * visitor.visitOutputFileProperty('outputFile', false, { it.call().path == 'output' }, OutputFilePropertyType.FILE)

        validateException(task, e, inputDoesNotExist {
            property('inputDir')
                .dir(missingDir)
                .includeLink()
        })
    }

    def validationActionFailsWhenInputDirectoryIsAFile() {
        given:
        def task = expectTaskCreated(TaskWithInputDir, existingFile)
        touch(task.inputDir)

        when:
        execute(task)

        then: