testland/multiplayer-state-machine-coverage

Build a coverage matrix for a networked-game state machine that exercises connect / authority-handoff / disconnect / reconnect / host-migration paths across Unity Netcode for GameObjects, Unreal Engine replication, and Mirror Networking. Workflow: enumerate the engine's connection states + ownership states + replicated-property update rules, cross them against latency / loss / out-of-order packet injection, encode each combination as a test fixture, and emit a go / no-go gate. Use before submitting a multiplayer title to platform cert - Microsoft's cert guide lists 'Multiplayer does not work as expected' as one of the most common Hold reasons, and Xbox XR-067 (MPSD session state) is failed by uncovered state-machine paths.

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Fixture-to-cert-clause mapping - reference

Name: testland/multiplayer-state-machine-coverage
Rating: 74.4 (1 reviews)
Author: testland

Map every fixture to the specific cert clause it covers, for multiplayer-state-machine-coverage Step 6. Examples from the Xbox Requirements page:

Test fixture	Xbox XR covered
Client gracefully disconnects on Xbox network loss	XR-074: "Titles must gracefully handle errors with Xbox and partner services connectivity."
MPSD session state retains member list across host migration	XR-067: "titles with online multiplayer functionality must maintain session-state information on the Xbox network … through the Xbox Multiplayer Session Directory (MPSD)"
Joining via Xbox shell launches into multiplayer session	XR-064: "titles that offer joinable game sessions must enable joinability through the Xbox shell interface"
Privilege check before joining MP session	XR-045: `XPRIVILEGE_MULTIPLAYER_SESSIONS` (ID 254) per the XR-045 privilege table
Player communication respects privacy settings	XR-015: `CommunicateUsingText` / `CommunicateUsingVoice` privilege checks per the XR-015 permissions table
Save roams across console types within a generation	XR-130: "Ensure that saved games work across console types within the generation"
Cross-network play visual identification	XR-007: "Titles must visually identify Xbox network users when they're playing with players from non-Xbox gaming networks"
Controller disconnect mid-multiplayer	XR-115: re-establish active controller; see XR-115

For Sony TRC and Nintendo Lotcheck, the analogous clauses are NDA - cite by stable ID per platform-cert-overview-reference and tag the fixture with the partner-portal clause number.