Add unit tests for the session SSE frame parser

[usmanimamu17-create]

Summary

processFrame in src/lib/session-sse.ts (single-line data: extraction, event: dispatch, JSON parsing with a swallow-on-error catch) has no unit tests. The parser's behavior — a multi-line data: frame losing the remainder, a malformed JSON payload being silently dropped, an unknown event type being ignored — is entirely unpinned, and the reconnect/401 behavior (companion issue) will need the parser contract locked down before it can be changed safely.

Proposal

• Export processFrame (or test through connectSessionSse with a mocked fetch that feeds frames through a ReadableStream).
• Cover: single-line frame, multi-line data: (assert current truncation behavior, to be fixed in the companion issue), malformed JSON, unknown event, missing event: line, and session_revoked with each documented reason.
• Cover the reconnect path: non-200 responses schedule a retry; 401/403 (after the companion fix) stop.

Acceptance criteria

• Each parser case above has an assertion.
• npm test passes with the new suite.

Getting started

npm test

Pattern-match tests/hermes.test.ts for structure; mock fetch with a stream if testing connectSessionSse.

[waterWang]

I'll work on this. Exporting processFrame and adding tests/session-sse.test.ts to pin the parser contract (single/multi-line data, malformed JSON, unknown event, missing event, session_revoked reasons).

[maybay-dev]

@maybay-dev has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

please i will love love to work on these issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @maybay-dev to this issue.

[AbdulSnk]

@AbdulSnk has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer, I would like to work on this issue, i read the issue description and the analyse the codebase carefully.

I will open PR within the stipulated time frame

ℹ️ Repo Maintainers: To accept this application, review their application or assign @AbdulSnk to this issue.

[Degentle12]

@Degentle12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer may I fix this issue please

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[drips-wave]

Congratulations, @AbdulSnk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @AbdulSnk: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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