}

    // Test FilePurgeVisitor postVisitDirectory
    @Test
    public void test_FilePurgeVisitor_postVisitDirectory() throws IOException {
        // Test empty directory deletion logic
        File emptyDir = new File(tempDir, "empty");
        emptyDir.mkdirs();
        assertTrue(emptyDir.exists());

        // Simulate the behavior of postVisitDirectory - delete empty directories

                throws IOException {
              Files.deleteIfExists(file);
              return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc)
                throws IOException {
              if (exc != null) {
                return FileVisitResult.TERMINATE;
              }
              Files.deleteIfExists(dir);

                throws IOException {
              Files.deleteIfExists(file);
              return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc)
                throws IOException {
              if (exc != null) {
                return FileVisitResult.TERMINATE;
              }
              Files.deleteIfExists(dir);

                logger.warn("I/O exception on {}", file, e);
            }
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult postVisitDirectory(final Path dir, final IOException e) throws IOException {
            if (e != null) {
                logger.warn("I/O exception on {}", dir, e);
            }
            deleteEmptyDirectory(dir);