FEAT: Full Stack Code Coverage

[bewithgaurav]

Work Item / Issue Reference

AB#38622

GitHub Issue: #<ISSUE_NUMBER>

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Summary

This pull request introduces a new workflow for unified code coverage on macOS, enabling combined Python and C++ coverage reports for pull requests. It adds a new GitHub Actions workflow, a coverage generation script, and updates the CMake build configuration to support Clang coverage instrumentation.

CI/CD and Coverage Reporting Improvements:

• Added a new GitHub Actions workflow .github/workflows/pr-code-coverage.yml to run tests on macOS, build C++ bindings, start a SQL Server container, and generate a unified (Python + C++) coverage report, which is automatically commented on pull requests.
• Added generate_codecov.sh script to automate the process of collecting, merging, and generating unified HTML coverage reports from both Python and C++ code using LLVM, lcov, and coverage-lcov.

Build System Updates:

• Updated mssql_python/pybind/build.sh to configure CMake with Clang coverage instrumentation flags (-fprofile-instr-generate -fcoverage-mapping) on macOS, enabling C++ code coverage collection.

[Copilot]

Pull Request Overview

This PR introduces a comprehensive code coverage solution for the mssql-python project, enabling unified Python and C++ coverage reporting on macOS through GitHub Actions. The implementation adds automated coverage collection, merging, and PR commenting capabilities.

• Adds a new GitHub Actions workflow for macOS-based unified coverage testing on pull requests
• Implements a shell script to automate coverage collection, merging Python and C++ coverage data
• Updates the CMake build configuration to enable Clang coverage instrumentation on macOS

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
.github/workflows/pr-code-coverage.yml	New GitHub Actions workflow for running tests and generating unified coverage reports on macOS
generate_codecov.sh	New script to collect, merge, and generate HTML coverage reports from Python and C++ code
mssql_python/pybind/build.sh	Updated to include Clang coverage flags for C++ instrumentation on macOS

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[github-actions]

✅ Azure DevOps build completed successfully.
👉 View Full Coverage Report

[github-actions]

📊 Code Coverage Report

🎯 Coverage 71%

📈 Lines Covered: 2970 out of 4182 📁 Project: mssql-python 🔍 Parser: Cobertura

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📋 Files Needing Attention

📉 Files with lowest coverage (click to expand)

mssql_python.pybind.ddbc_bindings.cpp: 62.1%
mssql_python.ddbc_bindings.py: 68.5%
mssql_python.pybind.connection.connection_pool.cpp: 78.9%
mssql_python.helpers.py: 84.7%
mssql_python.auth.py: 85.3%

💡 Tip: Focus on improving coverage for these files to boost overall project health

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🔗 Quick Links

� Build Status	📊 Coverage Details
View Azure DevOps Build	Browse Full Coverage Report

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