Switching from using diff cover executable to diff cover import

[kelper-hub]

PR Type

Enhancement, Tests

---

Description

• Replaced diff-cover command execution with direct module import.

• Enhanced error handling for diff-cover integration.

• Updated tests to validate diff-cover module usage.

• Added diff-cover dependency and templates to CI and build process.

---

Changes walkthrough 📝

	Relevant files
Enhancement	UnitTestValidator.py Refactor `diff-cover` integration to use module import      cover_agent/UnitTestValidator.py Replaced diff-cover command execution with module import. Added error handling for diff-cover execution. Updated logging to reflect new integration. Adjusted method documentation for clarity. +29/-15
Tests	test_UnitTestValidator.py Add tests for `diff-cover` module integration                        tests/test_UnitTestValidator.py Updated tests to mock diff-cover module usage. Added test for successful diff-cover execution. Added test for handling diff-cover execution failure. Simplified assertion for coverage increase validation. +29/-5
Configuration changes	ci_pipeline.yml Update CI pipeline to include `diff-cover`                              .github/workflows/ci_pipeline.yml Added diff-cover to pip install dependencies. Ensured CI pipeline supports diff-cover integration. +1/-1      Makefile Include `diff-cover` templates in build process                    Makefile Added diff-cover templates to build process. Ensured diff-cover templates are included in the installer. +3/-0

---

💡 PR-Agent usage: Comment /help "your question" on any pull request to receive relevant information

[qodo-merge-pro]

Qodo Merge was enabled for this repository. To continue using it, please link your Git account with your Qodo account here.

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Error Handling The error handling for diff-cover execution only logs the error but doesn't propagate it. Consider whether errors should fail the coverage report generation. try: diff_cover_main(diff_cover_args) except Exception as e: self.logger.error(f"Error running diff-cover: {e}")

[qodo-merge-pro]

Qodo Merge was enabled for this repository. To continue using it, please link your Git account with your Qodo account here.

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	Add proper exit code validation to ensure the command executed successfully Add a return value check for diff_cover_main() to ensure the report was generated successfully, as the function might return a non-zero exit code without raising an exception. cover_agent/UnitTestValidator.py [717-720] try: - diff_cover_main(diff_cover_args) + result = diff_cover_main(diff_cover_args) + if result != 0: + self.logger.error(f"diff-cover failed with exit code: {result}") + raise Exception(f"diff-cover failed with exit code: {result}") except Exception as e: self.logger.error(f"Error running diff-cover: {e}") + raise Apply this suggestion Suggestion importance[1-10]: 8 Why: The suggestion adds crucial error handling by checking the return value of diff_cover_main, which could fail silently. This prevents potential issues where coverage reports might be incomplete or invalid.	8
General	Add input file validation to prevent runtime errors with missing files Verify that the coverage report files exist before running diff-cover to prevent cryptic errors and provide better error messages. cover_agent/UnitTestValidator.py [708-714] +if not os.path.exists(self.code_coverage_report_path): + raise FileNotFoundError(f"Coverage report not found: {self.code_coverage_report_path}") diff_cover_args = [ "diff-cover", "--json-report", self.diff_cover_report_path, "--compare-branch={}".format(self.comparison_branch), self.code_coverage_report_path ] Apply this suggestion Suggestion importance[1-10]: 7 Why: Adding file existence checks before running diff-cover provides better error handling and user feedback, preventing cryptic runtime errors that could be confusing to debug.	7

[kelper-hub]

Old PR: #237