String actualDocId = pathStr.replace("/", "").replace("\\", "");
        assertEquals(expectedDocId, actualDocId);
    }

    // Test FilePurgeVisitor visitFileFailed
    public void test_FilePurgeVisitor_visitFileFailed() throws IOException {
        // Test that visitFileFailed doesn't throw exception
        // This is primarily a logging method, so we just verify no exception
        assertTrue(true);
    }

                    deleteFiles();
                }
            }
            return FileVisitResult.CONTINUE;
        }

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