def inputFiles = visitor.fileProperties*.propertyFiles*.files.flatten()
                    assert inputFiles.empty
                }
            }

            task customTask(type: CustomTask) {
                input = null
            }
        """

        expect:
        succeeds "customTask"

        where:
        annotation << [InputFile, InputDirectory, InputFiles]
    }

                    def inputFiles = parameters.nestedBean.inputFiles
                    def input = inputArtifact.get().asFile
                    println "processing \${input.name} using \${inputFiles*.name}"
                    def output = outputs.file(input.name + ".green")
                    def paramContent = inputFiles.collect { it.file ? it.text : it.list().length }.join("")

                void execute() {
                    def buildDirectory = projectLayout.buildDirectory
                    inputFiles.files.each { File inputFile ->
                        def outputFile = buildDirectory.file(inputFile.name + ".out").get().asFile
                        GFileUtils.copyFile(inputFile, outputFile)
                    }
                }
            }
            allprojects {

            error(missingNormalizationStrategyConfig { type('MyTask').property('inputFile').annotatedWith('InputFile') }, 'validation_problems', 'missing_normalization_annotation'),
            error(missingNormalizationStrategyConfig { type('MyTask').property('inputFiles').annotatedWith('InputFiles') }, 'validation_problems', 'missing_normalization_annotation'),
        ])

        and:

import org.gradle.api.tasks.Destroys;
import org.gradle.api.tasks.IgnoreEmptyDirectories;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.InputDirectory;
import org.gradle.api.tasks.InputFile;
import org.gradle.api.tasks.InputFiles;
import org.gradle.api.tasks.Internal;
import org.gradle.api.tasks.LocalState;
import org.gradle.api.tasks.Nested;
import org.gradle.api.tasks.Optional;
import org.gradle.api.tasks.OutputDirectories;

            'nested.inputFile': missingNormalizationStrategy { annotatedWith('InputFile').includeLink().noIntro() },
            'nested.stringProperty': missingAnnotationMessage { property('nested.stringProperty').missingInput().includeLink().noIntro() },
            noPathSensitivity: missingNormalizationStrategy { annotatedWith('InputFiles').includeLink().noIntro() },

        execute(unitOfWork)

        when:
        inputFile.write("some new content")

        then:
        outOfDate(unitOfWork, inputFilesChanged(file: [inputFile]))
    }

    def "out-of-date when any input file type changes"() {
        given:
        execute(unitOfWork)

        when:
        inputFile.delete()
        inputFile.createDir()

        then:

    def "task with broken symlink in InputFiles is valid"() {
        def inputFileTarget = file("brokenInputFileTarget")
        def brokenInputFile = file('brokenInputFile').createLink(inputFileTarget)
        def output = file("output.txt")

        buildFile << """
            class CustomTask extends DefaultTask {

                @InputFiles FileCollection brokenInputFiles

        when:
        render missingNormalizationStrategy {
            type('SomeCacheableTask').property('inputFiles')
            annotatedWith('InputFiles')
            includeLink()
        }

        then:
        outputEquals """
Type 'SomeCacheableTask' property 'inputFiles' is annotated with @InputFiles but missing a normalization strategy.

        LocalState        | '@LocalState'                                              | FileCollection | null
        InputFile         | '@InputFile @PathSensitive(PathSensitivity.NONE)'          | File           | "new File(\"input.txt\")"
        InputFiles        | '@InputFiles @PathSensitive(PathSensitivity.NAME_ONLY)'    | Set            | "new HashSet()"