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Test Analytics

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

Tracking test quality over time and improving test collateral is key to maintaining a healthy DevOps pipeline. Test analytics provides near real-time visibility into your test data for builds and releases. It helps improve the efficiency of your pipeline by identifying repetitive, high impact quality issues.

Note

Test analytics is currently available only with Azure Pipelines.

Read the glossary to understand test reports terminology.

Install the Analytics extension if necessary

For more information, see The Analytics Marketplace extension.

View test analytics for builds

To help teams find and fix tests that fail frequently or intermittently, use the top failing tests report. The build summary includes the Analytics page that hosts this report. The top-level view provides a summary of the test pass rate and results for the selected build pipeline, for the specified period. The default range is 14 days.

View trends in build

View test analytics for releases

For tests executing as part of release, access test analytics from the Analytics link at the top right corner. As with build, the summary provides an aggregated view of the test pass rate and results for the specified period.

View trends in release

Test failures

Open a build or release summary to view the top failing tests report. This report provides a granular view of the top failing tests in the pipeline, along with the failure details.

Test analytics detail view

The detailed view contains two sections:

  • Summary: Provides key quantitative metrics for the tests executed in build or release over the specified period. The default view shows data for 14 days.

    • Pass rate and results: Shows the pass percentage, along with the distribution of tests across various outcomes.

      View pass rate

    • Failing tests: Provides a distinct count of tests that failed during the specified period. In the previous example, 986 test failures originated from 124 tests.

      View failing tests

    • Chart view: A trend of the total test failures and average pass rate on each day of the specified period.

      View chart

  • Results: List of top failed tests based on the total number of failures. Helps to identify problematic tests and lets you drill into a detailed summary of results.

    View results.

Group test failures

The report view can be organized in several different ways using the group by option. Grouping test results can provide deep insights into various aspects of the top failing tests. In the following example, the test results are grouped based on the test files they belong to. It shows the test files and their respective contribution towards the total of test failures, during the specified period to help you easily identify and prioritize your next steps. Additionally, for each test file, it shows the tests that contribute to these failures.

Group by test files

Drill down to individual tests

After you identify one or more tests in the Details section, select the individual test you want to analyze. This action provides a drill-down view of the selected test with a stacked chart of various outcomes such as passed or failed instances of the test, for each day in the specified period. This view helps you infer hidden patterns and take actions accordingly.

Drill down for test

The corresponding grid view lists all instances of execution of the selected test during that period.

View all test instances

Failure analysis

To perform failure analysis for root causes, choose one or more instances of test execution in the drill-down view to see failure details in context.

View failure details

Infer hidden patterns

When looking at the test failures for a single instance of execution, it's often difficult to infer any pattern. In the following example, the test failures occurred during a specific period, which helps narrow down the scope of investigation.

Example of test failure pattern.

Another example is tests that exhibit nondeterministic behavior (often referred to as flaky tests). Looking at an individual instance of test execution might not provide any meaningful insights into the behavior. However, observing test execution trends for a period can help infer hidden patterns, and help you resolve the failures.

Report information source

The source of information for test analytics is the set of published test results for the build or release pipeline. These results are accrued over a period of time, and form the basis of the rich insights that test analytics provides.

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