Test the delivery path across connected, disconnected, reconnecting, background, multi-tab, unauthorized, stale-client, duplicate, reordered, and expired-history states. Each row needs an authoritative result, visible result, and correlated evidence from every controllable hop.
Build cases around state transitions
Start with the event lifecycle: before the authoritative commit, after commit but before publish, after publish acknowledgement, after client receipt, after local state update, and after render. Cross those points with a client that is connected, joining, disconnected, reconnecting, or running in the background. Add permission changes, tenant changes, multiple tabs, and a client whose schema predates the event.
For each row, state the expected database version, persisted notification state, broker observation, client receipt count, local state, visible interface, and recovery behavior. Use stable event identifiers so a duplicate is distinguishable from a second legitimate event. Record provider and application timestamps, but use sequence or version evidence where ordering matters.
Separate application acceptance from provider availability
Automated tests can verify application publishing, permission checks, deduplication, reducer behavior, snapshots, and visible state. Provider availability and network conditions remain external variables. Simulate known disconnect and retry states in the application, then label any live-provider observation with its plan, region, time, and documented semantics rather than turning one successful run into an uptime claim.
A passing matrix shows the agreed cases converging on the expected product state. Failed and unobservable rows stay in the report with logs and next diagnostics. Include rollback and instrumentation checks so a release can be reversed and a future incident can be traced without rebuilding the evidence path from scattered logs.
Where the service stops
Reality Contact, LLC repairs the bounded application delivery path, but does not warrant a third-party provider, guarantee uninterrupted delivery, certify security or compliance, or work on emergency, medical, life-safety, or other consequential alerting systems. The buyer approves the authoritative event and expected interface states, controls provider accounts and production release, reviews limitations, and decides whether to deploy or extend the repaired path. This is application reliability engineering; it does not replace legal, security, compliance, safety, medical, or professional advice. The service does not work on emergency or life-safety alerts and does not guarantee uninterrupted delivery or a third-party provider's availability.
Sources: Ably message ordering documentation; Socket.IO connection recovery documentation.