}
        'file'                    | { TestFile output -> output.text = 'leftover file' }
    }

    def "unregistered stale outputs (#nonRegisteredDirectory) are not removed before task executes"() {
        def fixture = new StaleOutputFixture(buildDir: nonRegisteredDirectory)
        fixture.createInputs()
        buildScript(fixture.buildScript)
        fixture.createStaleOutputs()

        when: