def fileTree = new TestArchiveFileTree(TestDecompressionCoordinators.decompressionCoordinator(tmpDir.createDir("cache-dir")), backingFile)

        when:
        fileTree.visitStructure(visitor, owner)

        then:
        1 * visitor.visitFileTreeBackedByFile(backingFile, owner, fileTree)
        0 * _
    }

    static class TestArchiveFileTree extends AbstractArchiveFileTree {
        File backingFile