AZ-400 Designing and Implementing Microsoft DevOps Solutions Exam

Implement Code Coverage Analysis

Integrate and Configure Coverage Frameworks

Code coverage analysis helps ensure that your tests thoroughly verify your code. To implement this in Azure Pipelines, it's essential to integrate appropriate tools and set clear coverage thresholds.

Integrate Coverage Tools

Azure supports integration with various coverage tools such as Coverlet, OpenCover, and Visual Studio Test. These tools can be integrated directly into your build definitions within Azure Pipelines to automate the collection of coverage data. This includes configuring the build pipelines to run these tools and generate coverage reports during the CI/CD process.

Key steps include:

• Install Coverage Tools: Configure your pipeline to install tools like Coverlet, OpenCover, or Visual Studio Test.
• Run Tests: Use these tools to run your tests as part of the build process.
• Generate Reports: Capture and generate detailed reports of code coverage metrics.

Configure Coverage Thresholds

Once the coverage tools are integrated, it’s crucial to define coverage thresholds. These thresholds set the minimum acceptable levels for code coverage, ensuring that your tests validate the essential parts of your application’s codebase.

Steps to configure thresholds:

• Define Metrics: Determine acceptable coverage percentages for different aspects of your code (e.g., methods, statements).
• Set Thresholds: Apply these percentage thresholds within your pipeline’s configuration.
• Monitor: Regularly check these thresholds during automated builds to enforce high standards.

Analyze Reports

After generating reports, reviewing them is vital to identify untested code paths. This analysis helps pinpoint areas needing better test coverage.

Things to focus on:

• Identify Gaps: Review the coverage reports to find areas of code not covered by tests.
• Track Coverage Over Time: Monitor how coverage changes across builds and releases.

Enforce Quality Gates

Quality gates help ensure that coverage standards are met before any code is deployed. By establishing robust quality gates, you ensure only high-quality code proceeds through the pipeline.

To enforce quality gates:

• Set Up Gates: Configure Azure Pipelines to halt builds if coverage falls below defined thresholds.
• Automate Checks: Use automated checks to validate that each build meets specified coverage standards.

By integrating, configuring, analyzing, and enforcing code coverage within Azure pipelines, you can significantly enhance your test validation processes, leading to more reliable and maintainable software.

Conclusion

Implementing code coverage analysis in Azure involves multiple steps including integrating coverage tools, setting up coverage thresholds, analyzing reports, and enforcing quality gates. Using tools like Coverlet, OpenCover, and Visual Studio Test allows for seamless integration and automation of these tasks within Azure pipelines. Configuring appropriate thresholds ensures essential parts of your codebase are tested, while regular analysis of reports helps identify areas needing improvement. Finally, establishing quality gates reinforces high standards and ensures that only reliable and well-tested code is deployed. Adopting these practices will greatly improve the stability and maintainability of your applications.