}
        };

        long result = testManager.purge(1L);
        assertTrue(result >= 0);
    }

    // Test FilePurgeVisitor getDocId
    @Test
    public void test_FilePurgeVisitor_getDocId() throws IOException {
        // Test the getDocId logic without creating actual FilePurgeVisitor
        // The logic converts path to doc ID by removing path separators
        String pathStr = "_1/_2/docid123";