def task = project.tasks.create("myTask", MyTask)
        task.bean = null

        when:
        visitProperties(task)

        then:
        _ * visitor.visitNested() >> true
        1 * visitor.visitInputProperty('bean', { it.call() == null }, false)
    }

    def "cycle in nested inputs is detected"() {
        def task = project.tasks.create("myTask", TaskWithNestedObject)

            error(missingAnnotationConfig { type('MyTask').property('tree.nonAnnotated').missingInputOrOutput() }, 'validation_problems', 'missing_annotation'),
            error(missingAnnotationConfig { type('MyTask').property('tree.left.nonAnnotated').missingInputOrOutput() }, 'validation_problems', 'missing_annotation'),

            }

            task myTask(type: MyTask) {
                input = mkdir(inputDir)
                output = file("build/output.txt")
            }
        """
        String myTask = ':myTask'

        when:
        file("inputDir1/child") << "inputFile1"
        run myTask, '-PinputDir=inputDir1'
        then:
        executedAndNotSkipped(myTask)

        when:

        then:
        skipped(":myTask")
        file("build/myTask.txt").text == "value1"

        when:
        fails('myTask', "-Pmy=trash")
        then:
        failureDescriptionContains("Type 'MyTask' property 'strings' doesn't have a configured value.")

        when:
        fails('myTask')
        then:

            error(missingNormalizationStrategyConfig { type('MyTask').property('fileProp').annotatedWith('InputFile') }, 'validation_problems', 'missing_normalization_annotation'),

              }
            }

            tasks.register("myTask", MyTask.class)
        '''

        when:
        succeeds('myTask', '--serial=1234', '--serialNumber=4321')

        then:
        result.assertTaskExecuted(':myTask').assertOutputContains('Serial: 4321')

        when:
        succeeds('myTask', '--serialNumber=4321', '--serial=1234')

        then:

        buildFile << """
            task myTask {
              def inputFile = file("input/marker")
              inputs.files inputFile
              outputs.files "build/marker"
              doLast {
                println "exists: " + inputFile.exists()
              }
            }
        """

        when:
        succeeds("myTask")
        then:
        output.contains "exists: false"

        // given: buildSrc memory hog
        val memoryHogMb = 128
        val myTask = withFile(
            "buildSrc/src/main/groovy/MyTask.groovy",
            """
            import org.gradle.api.*
            import org.gradle.api.tasks.*

            class MyTask extends DefaultTask {
                static final byte[][] MEMORY_HOG = new byte[1024][1024 * $memoryHogMb]

            }

            abstract class MyTask extends MyBaseTask {
            }

            task myTask(type: MyTask)
        '''

        when:
        run 'myTask', '-Pprivate=first'

        then:
        def outputFile = file('build/output.txt')
        outputFile.text == 'first'

        when:
        run 'myTask', '-Pprivate=second'

        then:

        "Enum = String"                                 | "Property<MyEnum>"   | '"YES"'                                  | unsupportedWithCause("Cannot set the value of task ':myTask' property 'input'")