fix: Update test expectation for persisted config

Author: alvinveroy

.gitignore

@@ -138,3 +138,5 @@ dist
 #npmrc
 .npmrc
 .aider*
+CHANGELOG.md
+RETROSPECTION.md

CHANGELOG.md

@@ -13,6 +13,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Fixed
+- **Test Failure (`config-service.test.ts`):** (Git Commit ID: [GIT_COMMIT_ID_PLACEHOLDER])
+    - Corrected the test `ConfigService > should persist model configuration when setSuggestionModel is called` in `src/tests/lib/config-service.test.ts`.
+    - The test's expectation for the persisted JSON content in `model-config.json` was updated to include the `HTTP_PORT` field, aligning the test with the actual behavior of `ConfigService.persistModelConfiguration()`.
 - **HTTP Server Port Conflict (Git Commit ID: [GIT_COMMIT_ID_PLACEHOLDER]):**
     - Added error handling in `src/lib/server.ts` to detect if the configured `HTTP_PORT` is already in use (`EADDRINUSE`). The server will now log a specific error message and exit gracefully instead of crashing.
 - **ESLint Errors & Code Quality (Git Commit ID: [GIT_COMMIT_ID_PLACEHOLDER]):**

RETROSPECTION.md

@@ -262,3 +262,23 @@
 - If separate annotations are strongly desired for tools, further investigate the MCP SDK's specific requirements or recommended patterns for the 5-argument `server.tool` overload, or check if annotations should be part of an options object for the 4th argument.
 - For now, maintain consistency by using the 4-argument `server.tool(name, description, paramsSchema, handler)` signature for new tools unless a clear need and verified pattern for other overloads arise.
 
+# Retrospection for config-service.test.ts Fix (Git Commit ID: [GIT_COMMIT_ID_PLACEHOLDER])
+
+## What went well?
+- The failing test `ConfigService > should persist model configuration when setSuggestionModel is called` clearly indicated a mismatch between the expected and actual persisted JSON.
+- The root cause was identified: the test's `expectedJsonContent` was missing the `HTTP_PORT` field, which `ConfigService.persistModelConfiguration()` correctly includes.
+- The fix involved updating the test's expectation to align with the actual implementation, which is a standard approach for correcting such test failures.
+
+## What could be improved?
+- **Test Maintenance:** This incident re-emphasizes the importance of keeping unit tests synchronized with code changes. When the behavior of `persistModelConfiguration` was updated to include `HTTP_PORT`, the corresponding test should have been updated in the same changeset.
+- **Clarity of Test Data:** Ensuring that mock data and expected values in tests are meticulously maintained and clearly reflect the intended state can prevent confusion and speed up debugging.
+
+## What did we learn?
+- Unit tests serve as living documentation. When they fail due to outdated expectations, it signals a discrepancy between the documented behavior (the test) and the actual behavior (the code).
+- A systematic approach to updating tests alongside feature development or refactoring is crucial for maintaining a reliable test suite.
+- When a test fails on an assertion involving complex objects (like a JSON string), carefully diffing the expected and actual values is key to pinpointing the exact discrepancy.
+
+## Action Items / Follow-ups
+- Reinforce the practice of updating unit tests as an integral part of any pull request that modifies the behavior of the code under test.
+- When reviewing pull requests, pay attention to whether tests for modified components have also been updated.
+

src/tests/lib/config-service.test.ts

@@ -260,6 +260,7 @@ describe('ConfigService', () => {
     const initialOpenAiApiKey = service.OPENAI_API_KEY;         
     const initialGeminiApiKey = service.GEMINI_API_KEY;         
     const initialClaudeApiKey = service.CLAUDE_API_KEY;         
+    const initialHttpPort = service.HTTP_PORT; // Capture the HTTP_PORT from the service instance
     // When setSuggestionModel is called, _suggestionModel is updated.
     // _summarizationModel and _refinementModel are getters that derive from _suggestionModel
     // if their specific env vars are not set.
@@ -276,6 +277,7 @@ describe('ConfigService', () => {
         OPENAI_API_KEY: initialOpenAiApiKey,            // Persisted from initial state
         GEMINI_API_KEY: initialGeminiApiKey,            // Persisted from initial state
         CLAUDE_API_KEY: initialClaudeApiKey,            // Persisted from initial state
+        HTTP_PORT: initialHttpPort,                     // Persisted from service state
         SUMMARIZATION_MODEL: 'new_persisted_model',     // Derived from the new suggestion model
         REFINEMENT_MODEL: 'new_persisted_model'         // Derived from the new suggestion model
     };