[kirushik]

16 new tests covering previously untested claims and guarantees, organized by test level for maximum efficiency

[Copilot]

Pull request overview

Adds additional unit/integration/E2E coverage for crypto, wire-format, stego, identity backup guarantees, plus a CI guardrail for bundle size.

Changes:

• Add unit tests for crypto properties (ECDH symmetry/deniability framing, MSG anonymity, seed freshness), wire CONTACT non-authentication, and XEdDSA public verifiability.
• Expand stego tests (non-determinism, trim tolerance, null detection on non-encoded text) and property-based safety checks (no invisible/combining chars; compression non-expansion).
• Add E2E coverage for unknown-sender handling and self-encryption roundtrip; document the test layers; add a CI bundle-size threshold.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/unit/wire.test.ts	Adds a security-property test clarifying CONTACT check bytes are not authentication.
tests/unit/stego.test.ts	Adds tests around stego variability, whitespace tolerance, and rejecting non-encoded text.
tests/unit/sign.test.ts	Adds a test asserting third-party verifiability of broadcast signatures.
tests/unit/properties.test.ts	Adds property tests for stego output character safety and compression non-expansion.
tests/unit/identity.test.ts	Adds a test attempting to pin PBKDF2 iteration count.
tests/unit/crypto.test.ts	Adds tests for ECDH shared-secret symmetry, MSG anonymity, and seed freshness.
tests/unit/broadcast.test.ts	Adds a test for 3+ candidate fingerprint collision handling.
tests/integration/broadcast-pipeline.test.ts	Adds an integration test validating broadcast tail layout prevents repeatable leading bytes.
tests/e2e/conversation.spec.ts	Adds an E2E test for “unknown sender INTRO not committed to chat until saved”.
tests/e2e/basic.spec.ts	Adds an E2E self-encryption encode→decode roundtrip test.
docs/testing.md	Updates testing documentation to mention the new guarantees/tests and CI behavior.
.github/workflows/ci.yml	Adds a CI step to fail if dist/index.html exceeds 40KB.

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