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ble-reticulum/migration/reports/fragmentation_cpp_equivalence_20260516_1718.md

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C++ Protocol Core Fragmentation Equivalence Test

Date: 2026-05-16 Host: jp Python environment: rnsenv Repository: /usr/local/src/ble-reticulum

Command

cd /usr/local/src/ble-reticulum
python3 -m pytest migration/tests/test_fragmentation_cpp_equivalence.py -vv

Result

28 tests passed.

Coverage Summary

The C++ implementation was compared against the existing Python implementation for:

(rnsenv) jlpoole@jp /usr/local/src/ble-reticulum $ cd /usr/local/src/ble-reticulum
python3 -m pytest migration/tests/test_fragmentation_cpp_equivalence.py -vv
======================================================================================== test session starts ========================================================================================
platform linux -- Python 3.13.12, pytest-9.0.3, pluggy-1.6.0 -- /home/jlpoole/rnsenv/bin/python3
cachedir: .pytest_cache
rootdir: /usr/local/src/ble-reticulum
configfile: pytest.ini
plugins: anyio-4.12.1, asyncio-1.3.0
asyncio: mode=Mode.AUTO, debug=False, asyncio_default_fixture_loop_scope=function, asyncio_default_test_loop_scope=function
collected 28 items                                                                                                                                                                                  

migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_single_fragment_packets PASSED                                                                   [  3%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_multi_fragment_packets PASSED                                                                    [  7%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_mtu_boundary_sizes[20] PASSED                                                                    [ 10%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_mtu_boundary_sizes[23] PASSED                                                                    [ 14%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_mtu_boundary_sizes[50] PASSED                                                                    [ 17%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_mtu_boundary_sizes[185] PASSED                                                                   [ 21%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEFragmenterCppEquivalence::test_empty_and_non_bytes_packet_errors PASSED                                                         [ 25%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_single_fragment_reassembly PASSED                                                               [ 28%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_multi_fragment_reassembly PASSED                                                                [ 32%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_out_of_order_fragments_with_start_first PASSED                                                  [ 35%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_malformed_fragments PASSED                                                                      [ 39%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_duplicate_fragments_same_data PASSED                                                            [ 42%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_duplicate_fragments_different_data PASSED                                                       [ 46%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_stale_buffer_cleanup PASSED                                                                     [ 50%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_statistics_reset PASSED                                                                         [ 53%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestBLEReassemblerCppEquivalence::test_internal_reassemble_method_matches_python PASSED                                                [ 57%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_frame_deframe_round_trips[] PASSED                                                                  [ 60%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_frame_deframe_round_trips[Hello, World!] PASSED                                                     [ 64%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_frame_deframe_round_trips[~\x01~] PASSED                                                            [ 67%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_frame_deframe_round_trips[}\x02}] PASSED                                                            [ 71%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_frame_deframe_round_trips[\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff] PASSED [ 75%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_many_hdlc_round_trips PASSED                                                                        [ 78%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_invalid_hdlc_escape_sequences_and_frames[] PASSED                                                   [ 82%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_invalid_hdlc_escape_sequences_and_frames[~] PASSED                                                  [ 85%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_invalid_hdlc_escape_sequences_and_frames[missing-flags] PASSED                                      [ 89%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_invalid_hdlc_escape_sequences_and_frames[~\x01~~] PASSED                                            [ 92%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_invalid_hdlc_escape_sequences_and_frames[~}~] PASSED                                                [ 96%]
migration/tests/test_fragmentation_cpp_equivalence.py::TestHDLCFramerCppEquivalence::test_non_bytes_errors PASSED                                                                             [100%]

======================================================================================== 28 passed in 0.43s =========================================================================================
(rnsenv) jlpoole@jp /usr/local/src/ble-reticulum $

Interpretation

This establishes phase-1 behavioral equivalence for the protocol-core fragmentation/reassembly layer. The C++ code is not yet integrated into BLEInterface.py for live Reticulum/BLE traffic.