Review code coverage results

Azure DevOps Services | Azure DevOps Server 2022 - Azure DevOps Server 2019

Code coverage helps you determine the proportion of your project's code that is actually being tested by tests such as unit tests. To increase your confidence of the code changes, and guard effectively against bugs, your tests should exercise - or cover - a large proportion of your code.

Reviewing the code coverage result helps to identify code path(s) that are not covered by the tests. This information is important to improve the test collateral over time by reducing the test debt.

Example

To view an example of publishing code coverage results for your choice of language, see the Ecosystems section of the Pipelines topics. For example, collect and publish code coverage for JavaScript using Istanbul.

View results

The code coverage summary can be viewed on the Summary tab on the pipeline run summary.

The results can be viewed and downloaded on the Code coverage tab.

Note

In a multi-stage YAML pipeline, the code coverage results are only available after the completion of the entire pipeline. This means that you may have to separate the build stage into a pipeline of its own if you want to review the code coverage results prior to deploying to production.

Note

Merging code coverage results from multiple test runs is limited to .NET and .NET Core at present. This will be supported for other formats in a future release.

Artifacts

The code coverage artifacts published during the build can be viewed under the Summary tab on the pipeline run summary.

• If you use the Visual Studio Test task to collect coverage for .NET and .NET Core apps, the artifact contains .coverage files that can be downloaded and used for further analysis in Visual Studio.

  

• If you publish code coverage using Cobertura or JaCoCo coverage formats, the code coverage artifact contains an HTML file that can be viewed offline for further analysis.

  

Note

For .NET and .NET Core, the link to download the artifact is available by choosing the code coverage milestone in the build summary.

Tasks

• Publish Code Coverage Results publishes code coverage results to Azure Pipelines or TFS, which were produced by a build in Cobertura or JaCoCo format.
• Built-in tasks such as Visual Studio Test, .NET Core, Ant, Maven, Gulp, Grunt, and Gradle provide the option to publish code coverage data to the pipeline.

Help and support

• See our troubleshooting page
• Get advice on Stack Overflow, and get support via the Developer Community