[Tests] Add unit tests for issues #102, #103, #104, #105

[fboucher]

Summary

Closes #102, #103, #104, #105

All 227 tests pass (196 Api.Tests + 31 AIServices.Tests).

Changes

#102 — SummaryEndpoints tests (10 new tests)

• Happy-path tests for all 4 endpoints: GetSummaries, SaveSummary, GetReadingNotes, SaveReadingNotesMarkdown
• Not-found / empty response tests for GetSummaries and GetReadingNotes
• Validation-error test for SaveSummary (missing PartitionKey, RowKey, Title)
• BadRequest test for SaveReadingNotesMarkdown with empty body

#103 — AISettingsProvider fallback chain (13 new tests)

• DB happy path (with/without custom BaseUrl/ModelName)
• DB key absent → falls back to AppSettings:AiApiKey config
• DB exception thrown → falls back to config
• AppSettings:REKA_API_KEY config key fallback
• Env var REKA_API_KEY fallback
• All sources absent → throws InvalidOperationException

#104 — SettingEndpoints edge cases (3 new tests)

• GetSettings returns default prompts with required placeholders ({topic}, {content})
• GetSettings masks AiApiKey as "********" (security check)
• SaveSettings with empty PartitionKey returns 400

#105 — PostEndpoints edge cases (5 acceptance criteria verified + 5 pre-existing failures fixed)

• GET non-existent ID → 404
• DELETE non-existent ID → graceful handling
• Unread posts list when all read → empty
• Read posts list when none read → empty
• Duplicate post save behavior
• Fixed 5 pre-existing test failures caused by shared Azurite state

[fboucher]

✅ Code Review — APPROVED

Reviewed by: Livingston (Code Review Specialist)
All 26 acceptance criteria from issues #102, #103, #104, #105 are fully covered.

Coverage Summary:

• Issue #102 (SummaryEndpoints): ✅ 8/8 ACs covered
• Issue #103 (AISettingsProvider): ✅ 8/8 ACs covered
• Issue #104 (SettingEndpoints): ✅ 4/4 ACs covered
• Issue #105 (PostEndpoints): ✅ 6/6 ACs covered

Test Quality:

✅ All 227 tests pass (196 Api.Tests + 31 AIServices.Tests)
✅ Proper mocking with IDataStorageService and IConfiguration
✅ Edge cases thoroughly covered (null, empty, whitespace, non-existent)
✅ Follows xUnit + FluentAssertions conventions
✅ Pre-existing test failures fixed

Highlights:

• AISettingsProvider fallback chain: All 5 fallback paths tested (DB → AiApiKey config → REKA_API_KEY config → env var → throw)
• SummaryEndpoints: Happy paths + validation + not-found scenarios
• SettingEndpoints: Default prompts verified with {topic}/{content} placeholders + API key masking security test
• PostEndpoints: Comprehensive edge cases including empty list filtering and duplicate post behavior

Verdict:

APPROVE — Ready to merge. No gaps found.

*Excellent work by Linusecho BEGIN___COMMAND_OUTPUT_MARKER ; PS1= ; PS2= ; unset HISTFILE ; EC=0 ; echo ___BEGIN___COMMAND_DONE_MARKER___0 ; } 🎯

Full review document: .squad/decisions/inbox/livingston-pr109-review.md

[github-actions]

Package	Line Rate	Branch Rate	Health
NoteBookmark.AIServices	97%	64%	✔
NoteBookmark.Domain	5%	9%	❌
NoteBookmark.Api	91%	80%	✔
NoteBookmark.ServiceDefaults	96%	75%	✔
NoteBookmark.Domain	83%	72%	✔
NoteBookmark.AIServices	97%	64%	✔
NoteBookmark.Domain	5%	9%	❌
NoteBookmark.Api	91%	80%	✔
NoteBookmark.ServiceDefaults	96%	75%	✔
NoteBookmark.Domain	83%	72%	✔
Summary	63% (1582 / 2178)	49% (360 / 568)	➖