test(keyring): add unit test surface for production Keyring implementation#135
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…ation Covers all 6 scenarios from the architecture review: fresh-DEK and persistent-DEK round-trips, AEAD cross-algorithm rejection, Rewrap/RewrapAll idempotency, signing, and memory-zeroing. Uses an in-memory dekStore and a directly-constructed keyringImpl — no database or KMS required. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
internal/keyring/impl_test.gowith 15 unit tests covering the productionkeyringImpladapter (previously only reachable through integration tests)memDekStorewithin the test file so tests require no database or KMS — they run in milliseconds under-raceRewrap/RewrapAllidempotency, sign/verify, andZeromemory clearingTest plan
go test -race ./internal/keyring/...— all 20 tests pass (15 new + 5 pre-existingfake_test.go)🤖 Generated with Claude Code