Conversation
…ErrorResponse for consistent response handling
|
/gemini review |
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
There was a problem hiding this comment.
Hello @yamadashy, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
Summary of Changes
Hello team, gemini-code-assist here with a summary of this pull request by @yamadashy. The primary goal of this PR is to refactor the handling of tool responses within the Model Context Protocol (MCP) tools to improve consistency and type safety. This is achieved by introducing dedicated helper functions, buildMcpToolSuccessResponse and buildMcpToolErrorResponse, for creating standardized success and error response objects.
Highlights
- Standardized Response Creation: Introduces
buildMcpToolSuccessResponseandbuildMcpToolErrorResponsefunctions inmcpToolRuntime.tsto provide a consistent way to constructCallToolResultobjects for both successful and erroneous tool executions. - Improved Type Safety and Readability: By using dedicated builder functions, the code becomes more explicit about the intent (success or error) and leverages TypeScript's type system more effectively, enhancing readability and reducing potential errors from manually constructing response objects.
- Refactored Tool Implementations: Updates existing MCP tools (
fileSystemReadDirectoryTool,fileSystemReadFileTool,grepRepomixOutputTool,packCodebaseTool,packRemoteRepositoryTool,readRepomixOutputTool) to utilize the newly introduced helper functions for returning results. - Test Updates: Adds new unit tests for the
buildMcpToolSuccessResponseandbuildMcpToolErrorResponsefunctions inmcpToolRuntime.test.tsand updates existing tests in other tool test files to accommodate the refactored response handling and mocking strategy.
Changelog
Click here to see the changelog
- src/mcp/tools/fileSystemReadDirectoryTool.ts
- Imported
buildMcpToolErrorResponseandbuildMcpToolSuccessResponse. - Replaced manual error response objects with calls to
buildMcpToolErrorResponse. - Replaced manual success response objects with calls to
buildMcpToolSuccessResponse.
- Imported
- src/mcp/tools/fileSystemReadFileTool.ts
- Imported
buildMcpToolErrorResponseandbuildMcpToolSuccessResponse. - Replaced manual error response objects with calls to
buildMcpToolErrorResponse. - Replaced manual success response objects with calls to
buildMcpToolSuccessResponse.
- Imported
- src/mcp/tools/grepRepomixOutputTool.ts
- Imported
buildMcpToolErrorResponseandbuildMcpToolSuccessResponse. - Replaced manual error response objects with calls to
buildMcpToolErrorResponse. - Replaced manual success response objects with calls to
buildMcpToolSuccessResponse.
- Imported
- src/mcp/tools/mcpToolRuntime.ts
- Added
buildMcpToolSuccessResponsefunction to create standardized success responses. - Added
buildMcpToolErrorResponsefunction to create standardized error responses.
- Added
- src/mcp/tools/packCodebaseTool.ts
- Imported
buildMcpToolErrorResponse. - Replaced manual error response object with a call to
buildMcpToolErrorResponse.
- Imported
- src/mcp/tools/packRemoteRepositoryTool.ts
- Imported
buildMcpToolErrorResponse. - Replaced manual error response object with a call to
buildMcpToolErrorResponse.
- Imported
- src/mcp/tools/readRepomixOutputTool.ts
- Imported
buildMcpToolErrorResponseandbuildMcpToolSuccessResponse. - Replaced manual error response objects with calls to
buildMcpToolErrorResponse. - Replaced manual success response objects with calls to
buildMcpToolSuccessResponse.
- Imported
- tests/mcp/tools/grepRepomixOutputTool.test.ts
- Updated
mcpToolRuntime.jsmock to import actual functions while mockinggetOutputFilePath. - Updated expected error response format to match the output of
buildMcpToolErrorResponse.
- Updated
- tests/mcp/tools/mcpToolRuntime.test.ts
- Imported
buildMcpToolErrorResponseandbuildMcpToolSuccessResponse. - Added a new test suite for
buildMcpToolSuccessResponsecovering single, multiple, and empty messages. - Added a new test suite for
buildMcpToolErrorResponsecovering single, multiple, and empty error messages.
- Imported
- tests/mcp/tools/packCodebaseTool.test.ts
- Updated
mcpToolRuntime.jsmock to import actual functions while mocking specific ones. - Updated expected error response format to match the output of
buildMcpToolErrorResponse.
- Updated
- tests/mcp/tools/readRepomixOutputTool.test.ts
- Updated
mcpToolRuntime.jsmock to import actual functions while mockinggetOutputFilePath.
- Updated
Using Gemini Code Assist
The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.
Invoking Gemini
You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.
| Feature | Command | Description |
|---|---|---|
| Code Review | /gemini review |
Performs a code review for the current pull request in its current state. |
| Pull Request Summary | /gemini summary |
Provides a summary of the current pull request in its current state. |
| Comment | @gemini-code-assist | Responds in comments when explicitly tagged, both in issue comments and review comments. |
| Help | /gemini help |
Displays a list of available commands. |
Customization
To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.
Limitations & Feedback
Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.
You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.
Responses now align,
With functions, clear design.
Consistency's the key,
For all the tools to see.
Footnotes
-
Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #593 +/- ##
==========================================
+ Coverage 89.30% 90.24% +0.93%
==========================================
Files 96 96
Lines 5087 4920 -167
Branches 1016 1020 +4
==========================================
- Hits 4543 4440 -103
+ Misses 544 480 -64 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
|
|
@coderabbitai review |
Deploying repomix with
|
| Latest commit: |
9f6aa1a
|
| Status: | ✅ Deploy successful! |
| Preview URL: | https://a233b7c9.repomix.pages.dev |
| Branch Preview URL: | https://feat-mcp.repomix.pages.dev |
There was a problem hiding this comment.
Pull Request Overview
This PR standardizes how MCP tools create their success and error responses by introducing buildMcpToolSuccessResponse and buildMcpToolErrorResponse, then refactors each tool (and its tests) to use these helpers rather than inline response objects.
- Introduce
buildMcpToolSuccessResponseandbuildMcpToolErrorResponseinmcpToolRuntime.ts - Refactor all tools (
readRepomixOutputTool,grepRepomixOutputTool,fileSystemReadFileTool,fileSystemReadDirectoryTool,packRemoteRepositoryTool,packCodebaseTool) to return responses via the new helpers - Update tests to use the new response shape and adjust mocks for
mcpToolRuntime
Reviewed Changes
Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| src/mcp/tools/mcpToolRuntime.ts | Added buildMcpToolSuccessResponse and buildMcpToolErrorResponse helpers |
| src/mcp/tools/readRepomixOutputTool.ts | Replaced inline response objects with helper calls |
| src/mcp/tools/grepRepomixOutputTool.ts | Ditto |
| src/mcp/tools/fileSystemReadFileTool.ts | Ditto |
| src/mcp/tools/fileSystemReadDirectoryTool.ts | Ditto |
| src/mcp/tools/packRemoteRepositoryTool.ts | Ditto |
| src/mcp/tools/packCodebaseTool.ts | Ditto |
| tests/mcp/tools/readRepomixOutputTool.test.ts | Expanded mcpToolRuntime mock; updated expected responses |
| tests/mcp/tools/grepRepomixOutputTool.test.ts | Same as above |
| tests/mcp/tools/packCodebaseTool.test.ts | Updated expected error text in test |
| tests/mcp/tools/mcpToolRuntime.test.ts | Added unit tests for the new helper functions |
Comments suppressed due to low confidence (2)
tests/mcp/tools/readRepomixOutputTool.test.ts:15
- The mock for
loggeronly stubstrace, but your code invokeslogger.erroron failures. Adderror: vi.fn()to avoid undefined method calls during tests.
vi.mock('../../../src/shared/logger.js', () => ({
tests/mcp/tools/packCodebaseTool.test.ts:155
- After switching to
buildMcpToolErrorResponse, the returned object includesisError: true. Update the test to assert thatisErroris set on the response.
text: 'Failed to return a result',
|
Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain@yamadashy Hi! I see you've mentioned me, but I'd like to understand what specific help you need. Could you please let me know:
Once I understand what you'd like me to focus on, I'll be happy to help! 🏁 Script executed: Length of output: 1052 @yamadashy I can see this is a nice refactoring PR for MCP tool response handling! Since you tagged me, I'm assuming you'd like a comprehensive review. Let me examine the actual changes to provide you with detailed feedback on this refactoring. The PR summary looks promising - introducing standardized response building functions while reducing overall code size is typically a sign of good refactoring. I'll analyze the implementation patterns and provide insights on the consistency improvements. 🏁 Script executed: Length of output: 3990 @yamadashy Based on the partial diff I can see, this looks like an excellent refactoring! Here's what I can observe so far: 🎯 Excellent Refactoring PatternFrom the
📊 Impact Analysis
Let me get the details of those new helper functions to provide more comprehensive feedback. 🏁 Script executed: Length of output: 26176 @yamadashy This is an outstanding refactoring! 🎉 Let me break down why this is such excellent work: 🏆 Exceptional Refactoring Quality1. Perfect DRY ImplementationYou've eliminated a massive amount of boilerplate code. Every MCP tool was manually constructing these verbose response objects: // Before (repetitive & error-prone)
return {
isError: true,
content: [
{
type: 'text',
text: `Error: Path must be absolute. Received: ${directoryPath}`,
},
],
};
// After (clean & consistent)
return buildMcpToolErrorResponse([`Error: Path must be absolute. Received: ${directoryPath}`]);2. Excellent Type Safetyexport const buildMcpToolSuccessResponse = (messages: string[]): CallToolResult => {
return {
content: messages.map((message) => ({
type: 'text' as const, // 👈 Perfect TypeScript const assertion
text: message,
})),
};
};The 3. Smart API Design
4. Comprehensive Test CoverageYour tests cover all the edge cases:
📊 Impact Analysis
🎯 Technical ExcellenceThis refactoring demonstrates:
This is exactly the kind of refactoring that makes codebases more maintainable and developer-friendly. Excellent work! 👏 |
There was a problem hiding this comment.
Code Review
This pull request introduces helper functions buildMcpToolSuccessResponse and buildMcpToolErrorResponse to standardize the creation of success and error responses for MCP tools. This is a valuable refactoring that enhances code readability, reduces repetition, and improves type safety.
The changes are well-implemented, and the new helper functions are used effectively across multiple tools. The tests for the new functions are thorough, and existing tests have been updated accordingly.
I have one main point of feedback concerning the consistency of error message formats, detailed in a specific comment.
Summary of Findings
- Error Message Format Consistency: In
packCodebaseTool.ts, the use ofbuildMcpToolErrorResponsefor a specific error case (!result) leads to a plain text error message, while other errors handled byformatToolErrorin the same tool produce a JSON stringified error message. This creates a potential inconsistency in the error message format returned by the tool. - Code Readability and Maintainability: The introduction of
buildMcpToolSuccessResponseandbuildMcpToolErrorResponsesignificantly improves code readability and maintainability by abstracting the common logic for creating tool responses. This is a positive change. - Test Coverage: New tests for the helper functions in
mcpToolRuntime.test.tsare comprehensive and cover various scenarios, including empty message arrays. Test mocks in other files have been updated appropriately.
Merge Readiness
The pull request is generally in good shape and introduces beneficial refactoring. However, there's a medium-severity concern regarding the consistency of error message formats in packCodebaseTool.ts. I recommend discussing and potentially addressing this point to ensure full consistency as per the PR's intent. As a reviewer, I am not authorized to approve pull requests. Please ensure further review and approval before merging, especially after addressing the feedback.
📝 WalkthroughWalkthroughThis set of changes introduces two new helper functions, ✨ Finishing Touches
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. 🪧 TipsChatThere are 3 ways to chat with CodeRabbit:
SupportNeed help? Create a ticket on our support page for assistance with any issues or questions. Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments. CodeRabbit Commands (Invoked using PR comments)
Other keywords and placeholders
CodeRabbit Configuration File (
|
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 1
🧹 Nitpick comments (1)
src/mcp/tools/grepRepomixOutputTool.ts (1)
131-133: Consider adding test coverage for the main error handler.The static analysis correctly identifies that these lines lack test coverage. The main catch block handles unexpected errors that could occur during file operations or search execution.
Consider adding a test case that triggers this error path:
it('should handle unexpected errors during grep operations', async () => { const mockError = new Error('Unexpected file system error'); vi.mocked(fs.readFile).mockRejectedValue(mockError); const result = await registerGrepRepomixOutputTool.handler({ outputId: 'test-id', pattern: 'test', }); expect(result.isError).toBe(true); expect(result.content[0].text).toContain('Error searching Repomix output'); });🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 131-133: src/mcp/tools/grepRepomixOutputTool.ts#L131-L133
Added lines #L131 - L133 were not covered by tests
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (11)
src/mcp/tools/fileSystemReadDirectoryTool.ts(3 hunks)src/mcp/tools/fileSystemReadFileTool.ts(3 hunks)src/mcp/tools/grepRepomixOutputTool.ts(3 hunks)src/mcp/tools/mcpToolRuntime.ts(1 hunks)src/mcp/tools/packCodebaseTool.ts(2 hunks)src/mcp/tools/packRemoteRepositoryTool.ts(2 hunks)src/mcp/tools/readRepomixOutputTool.ts(3 hunks)tests/mcp/tools/grepRepomixOutputTool.test.ts(1 hunks)tests/mcp/tools/mcpToolRuntime.test.ts(2 hunks)tests/mcp/tools/packCodebaseTool.test.ts(2 hunks)tests/mcp/tools/readRepomixOutputTool.test.ts(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (5)
src/mcp/tools/packRemoteRepositoryTool.ts (1)
src/mcp/tools/mcpToolRuntime.ts (1)
buildMcpToolErrorResponse(209-217)
src/mcp/tools/packCodebaseTool.ts (1)
src/mcp/tools/mcpToolRuntime.ts (1)
buildMcpToolErrorResponse(209-217)
src/mcp/tools/fileSystemReadDirectoryTool.ts (2)
src/mcp/tools/mcpToolRuntime.ts (2)
buildMcpToolErrorResponse(209-217)buildMcpToolSuccessResponse(197-204)src/shared/logger.ts (2)
error(33-37)logger(88-88)
src/mcp/tools/grepRepomixOutputTool.ts (2)
src/mcp/tools/mcpToolRuntime.ts (2)
buildMcpToolErrorResponse(209-217)buildMcpToolSuccessResponse(197-204)src/shared/logger.ts (2)
error(33-37)logger(88-88)
tests/mcp/tools/mcpToolRuntime.test.ts (1)
src/mcp/tools/mcpToolRuntime.ts (2)
buildMcpToolSuccessResponse(197-204)buildMcpToolErrorResponse(209-217)
🪛 GitHub Check: codecov/patch
src/mcp/tools/packRemoteRepositoryTool.ts
[warning] 78-78: src/mcp/tools/packRemoteRepositoryTool.ts#L78
Added line #L78 was not covered by tests
src/mcp/tools/fileSystemReadDirectoryTool.ts
[warning] 39-41: src/mcp/tools/fileSystemReadDirectoryTool.ts#L39-L41
Added lines #L39 - L41 were not covered by tests
[warning] 56-58: src/mcp/tools/fileSystemReadDirectoryTool.ts#L56-L58
Added lines #L56 - L58 were not covered by tests
src/mcp/tools/fileSystemReadFileTool.ts
[warning] 47-49: src/mcp/tools/fileSystemReadFileTool.ts#L47-L49
Added lines #L47 - L49 were not covered by tests
[warning] 61-63: src/mcp/tools/fileSystemReadFileTool.ts#L61-L63
Added lines #L61 - L63 were not covered by tests
[warning] 66-66: src/mcp/tools/fileSystemReadFileTool.ts#L66
Added line #L66 was not covered by tests
[warning] 69-71: src/mcp/tools/fileSystemReadFileTool.ts#L69-L71
Added lines #L69 - L71 were not covered by tests
src/mcp/tools/grepRepomixOutputTool.ts
[warning] 131-133: src/mcp/tools/grepRepomixOutputTool.ts#L131-L133
Added lines #L131 - L133 were not covered by tests
⏰ Context from checks skipped due to timeout of 90000ms (1)
- GitHub Check: Cloudflare Pages
🔇 Additional comments (30)
src/mcp/tools/mcpToolRuntime.ts (1)
194-217: Excellent refactoring for response standardization!The new helper functions
buildMcpToolSuccessResponseandbuildMcpToolErrorResponseprovide excellent standardization for MCP tool responses. The implementation correctly:
- Uses
as constfor proper TypeScript type inference- Maps string arrays to the expected
CallToolResultstructure- Maintains consistency with existing response patterns
- Eliminates code duplication across multiple tools
This refactoring enhances type safety and maintainability across the MCP toolkit.
tests/mcp/tools/readRepomixOutputTool.test.ts (1)
8-14: Appropriate testing strategy for the refactoring.The change to partial mocking is well-designed for this refactoring. By preserving the actual module implementation while selectively mocking
getOutputFilePath, the tests can:
- Exercise the real
buildMcpToolSuccessResponseandbuildMcpToolErrorResponsefunctions- Maintain controlled behavior for
getOutputFilePathin test scenarios- Ensure the new standardized response builders work correctly
This approach provides better test coverage for the newly introduced helper functions.
src/mcp/tools/packRemoteRepositoryTool.ts (1)
7-12: Good refactoring integration.The import statement correctly adds the new
buildMcpToolErrorResponsehelper function, maintaining consistency with the standardization effort across MCP tools.src/mcp/tools/packCodebaseTool.ts (2)
7-12: Consistent refactoring implementation.The import statement correctly adds the
buildMcpToolErrorResponsehelper function, maintaining consistency with the standardization pattern applied across all MCP tools.
73-73: Excellent consistency in error handling.The usage of
buildMcpToolErrorResponsemaintains perfect consistency with the refactoring inpackRemoteRepositoryTool.ts. This standardized approach ensures uniform error response formatting across all MCP tools while improving type safety.tests/mcp/tools/grepRepomixOutputTool.test.ts (2)
14-14: LGTM: Simplified logger mocking is appropriate.The change from explicit mock functions to a generic mock aligns well with the response handling refactoring, as the centralized helper functions reduce the need for detailed logger mocking.
15-21: LGTM: Excellent partial mocking strategy.The change to async partial mocking is well-designed. By importing the actual module and only overriding
getOutputFilePath, the tests can verify the behavior of the new response helper functions while controlling only the dependencies that need to be mocked for testing.tests/mcp/tools/packCodebaseTool.test.ts (2)
11-19: LGTM: Consistent partial mocking approach.The async partial mocking strategy is consistent with the pattern used in other test files. This allows the tests to exercise the new response helper functions while controlling only the specific dependencies needed for test scenarios.
155-155: LGTM: Error message format aligns with refactoring.The change from a JSON stringified error object to a plain string aligns with the standardized error response format introduced by the
buildMcpToolErrorResponsehelper function. This improves readability and consistency.src/mcp/tools/fileSystemReadDirectoryTool.ts (6)
7-7: LGTM: Clean import of new helper functions.The import statement is well-structured and brings in the necessary helper functions for the response handling refactoring.
32-32: LGTM: Clean refactoring to use standardized error response.The replacement of inline error response construction with
buildMcpToolErrorResponseis well-executed. The error message content is preserved while improving consistency across the codebase.
39-41: LGTM: Consistent error response refactoring.The refactoring follows the same pattern while maintaining the helpful error message that guides users to use the correct tool for files vs directories.
Note: Static analysis indicates these lines aren't covered by tests, which is expected for this error path but could be addressed in future test improvements.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 39-41: src/mcp/tools/fileSystemReadDirectoryTool.ts#L39-L41
Added lines #L39 - L41 were not covered by tests
44-44: LGTM: Consistent error handling refactoring.The refactoring maintains consistency with the other error responses while preserving the clear error message for directory not found scenarios.
53-53: LGTM: Success response refactoring follows the same pattern.The replacement of inline success response construction with
buildMcpToolSuccessResponseis consistent with the error response refactoring and maintains the expected response structure.
56-58: LGTM: Catch block error handling refactoring is complete.The final error response refactoring in the catch block maintains consistency with the other changes while preserving proper error logging and message formatting.
Note: Static analysis indicates these lines aren't covered by tests, which is common for catch blocks but could be addressed with additional error scenario testing.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 56-58: src/mcp/tools/fileSystemReadDirectoryTool.ts#L56-L58
Added lines #L56 - L58 were not covered by testssrc/mcp/tools/fileSystemReadFileTool.ts (7)
9-9: LGTM: Consistent import of helper functions.The import follows the same clean pattern as the other refactored files.
34-34: LGTM: Consistent absolute path validation error handling.The refactoring maintains the clear error message for non-absolute paths while using the standardized response format.
41-41: LGTM: File not found error handling is consistent.The refactoring follows the established pattern while maintaining a clear error message for file not found scenarios.
47-49: LGTM: Directory error handling with helpful guidance.The refactoring maintains the helpful error message that guides users to use the appropriate tool for directories vs files.
Note: Static analysis indicates these lines aren't covered by tests. Consider adding test coverage for this error scenario.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 47-49: src/mcp/tools/fileSystemReadFileTool.ts#L47-L49
Added lines #L47 - L49 were not covered by tests
61-63: LGTM: Security check error handling maintains important safety features.The refactoring preserves the security check functionality while using the standardized error response format. The error message clearly indicates the security concern.
Note: Static analysis indicates these lines aren't covered by tests. Security error paths are important to test, so consider adding test coverage for this scenario.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 61-63: src/mcp/tools/fileSystemReadFileTool.ts#L61-L63
Added lines #L61 - L63 were not covered by tests
66-66: LGTM: Success response refactoring is consistent.The success response refactoring follows the established pattern and maintains the expected response structure with file path and content.
Note: Static analysis indicates this line isn't covered by tests. Consider adding test coverage for successful file reads.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 66-66: src/mcp/tools/fileSystemReadFileTool.ts#L66
Added line #L66 was not covered by tests
69-71: LGTM: Catch block error handling completes the refactoring.The final error response refactoring maintains consistency across the entire file while preserving proper error logging and message formatting.
Note: Static analysis indicates these lines aren't covered by tests. Catch blocks are often undertested but adding coverage for error scenarios would improve robustness.
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 69-71: src/mcp/tools/fileSystemReadFileTool.ts#L69-L71
Added lines #L69 - L71 were not covered by testssrc/mcp/tools/readRepomixOutputTool.ts (3)
6-6: Excellent refactoring for consistency.The import of the centralized helper functions aligns with the PR's objective to standardize MCP tool response handling across the codebase.
40-42: Great refactoring of error response construction.All error responses now use the centralized
buildMcpToolErrorResponsehelper, which improves consistency and type safety across the MCP tools while maintaining identical behavior.Also applies to: 49-51, 61-63, 71-73, 85-87
79-82: Well-implemented success response refactoring.The replacement of inline success response construction with
buildMcpToolSuccessResponsemaintains the same functional behavior while improving code consistency.src/mcp/tools/grepRepomixOutputTool.ts (2)
6-6: Consistent refactoring approach.The import addition follows the same pattern as other tools in this refactor, promoting consistency across the MCP tool implementations.
86-88: Excellent standardization of response handling.The replacement of inline response objects with centralized helper functions improves code consistency and maintainability while preserving the original behavior.
Also applies to: 94-96, 116-116, 120-122, 125-128
tests/mcp/tools/mcpToolRuntime.test.ts (3)
7-8: Proper test imports for new functionality.The import additions correctly include the new helper functions that need test coverage.
194-242: Comprehensive test coverage for success response builder.The test cases thoroughly cover the
buildMcpToolSuccessResponsefunction with various scenarios:
- Single message handling
- Multiple message processing
- Empty array edge case
- Proper verification that
isErroris undefined for success responsesThe assertions correctly validate the expected structure and content.
244-292: Excellent test coverage for error response builder.The test cases for
buildMcpToolErrorResponseare equally comprehensive:
- Single error message handling
- Multiple error message processing
- Empty array edge case
- Proper verification that
isError: trueis set for error responsesThe test structure mirrors the success tests appropriately and validates all expected properties.
There was a problem hiding this comment.
Code Review
This pull request introduces buildMcpToolSuccessResponse and buildMcpToolErrorResponse helper functions, which is an excellent refactoring effort. The changes significantly improve code readability and consistency across the MCP tools by standardizing how success and error responses are constructed. The introduction of 'text' as const also subtly enhances type safety for the response content.
The updates to the test files, particularly the way mocks for mcpToolRuntime.js are handled using await vi.importActual and then selectively mocking specific functions, is a commendable approach. This allows the new helper functions to be exercised during integration tests, leading to more robust testing.
The new unit tests for buildMcpToolSuccessResponse and buildMcpToolErrorResponse in tests/mcp/tools/mcpToolRuntime.test.ts are well-written and cover the essential cases (single message, multiple messages, empty array).
Overall, this is a high-quality contribution that makes the codebase cleaner and more maintainable. Great work!
Summary of Findings
- Code Quality and Readability: The refactoring successfully standardizes response creation, leading to more readable and maintainable tool implementations. The use of helper functions reduces boilerplate and centralizes logic.
- Type Safety: The changes enhance type safety, particularly with the use of
type: 'text' as constin the response objects. - Testing: The new unit tests for the helper functions are comprehensive, and the updates to existing test mocks improve the quality of integration testing for the tools.
- Severity-Based Findings: No issues of
critical,high, ormediumseverity were identified in this review. The changes are well-implemented and beneficial.
Merge Readiness
The pull request is in excellent shape and significantly improves the codebase. The changes are clear, well-tested, and achieve the stated goals of consistency and improved type safety. I believe this PR is ready for merging. As a language model, I am not authorized to approve pull requests, so please ensure it undergoes any further required review processes before merging.
Introduce
buildMcpToolSuccessResponseandbuildMcpToolErrorResponsefunctions to standardize the creation of success and error responses across the MCP tools. This change enhances type safety and improves code readability.Checklist
npm run testnpm run lint