public Foo() {
                    getInputs().property("a", null).optional(true);
                }

                @TaskAction
                public void doSomething() {}
            }
        """

        buildFile << """
            task foo(type: Foo)
        """

        expect:
        succeeds "foo"
    }

            class CheckDeps extends DefaultTask {
                @InputFiles
                final ConfigurableFileCollection input = project.objects.fileCollection()

                @TaskAction
                void doSomething() {
                    println input.files.name
                }
            }
        """

        when:
        lib.pom.expectGet()
        lib.artifact.expectGet()

        then: