then:
        assertSingleFileTree(singleFileTree)
        assertSingleFileTree(singleFileTree.matching { include(file.name) })
        assertEmptyTree(singleFileTree.matching { exclude(file.name) })

        when:
        def fromConfigurableFiles = TestFiles.fileOperations(tempDir).configurableFiles(file).asFileTree

        then:
        assertSingleFileTree(fromConfigurableFiles)