Compatibility

Test Impact Analysis is only supported on dd-trace>= 2.22.0 (execute dd-trace --version to get the version of the tool).

Setup

Test Optimization

Prior to setting up Test Impact Analysis, set up Test Optimization for .NET. If you are reporting data through the Agent, use v6.40 and later or v7.40 and later.

Activate Test Impact Analysis for the test service

You, or a user in your organization with the Intelligent Test Runner Activation (intelligent_test_runner_activation_write) permission, must activate Test Impact Analysis on the Test Service Settings page.

Run tests with Test Impact Analysis enabled

After completing setup, run your tests as you normally do by using dotnet test or VSTest.Console.exe:

dd-trace ci run --dd-service=my-dotnet-app --dd-env=ci -- dotnet test

dd-trace ci run --dd-service=my-dotnet-app --dd-env=ci -- VSTest.Console.exe {test_assembly}.dll

Disable skipping for specific tests

You can override the Test Impact Analysis behavior and prevent specific tests from being skipped. These tests are referred to as unskippable tests.

Why make tests unskippable?

Test Impact Analysis uses code coverage data to determine whether or not tests should be skipped. In some cases, this data may not be sufficient to make this determination.

Examples include:

• Tests that read data from text files.
• Tests that interact with APIs outside of the code being tested (such as remote REST APIs).
• Designating tests as unskippable ensures that Test Impact Analysis runs them regardless of coverage data.

Marking tests as unskippable

using Xunit;
using Xunit.Abstractions;

public class MyTestSuite
{
  [Fact]
  [Trait("datadog_itr_unskippable", null)]
  public void MyTest()
  {
    // ...
  }
}

using Xunit;
using Xunit.Abstractions;

[Trait("datadog_itr_unskippable", null)]
public class MyTestSuite
{
  [Fact]
  public void MyTest()
  {
    // ...
  }
}

using NUnit.Framework;

public class MyTestSuite
{
  [Test]
  [Property("datadog_itr_unskippable", "")]
  public void MyTest()
  {
    // ...
  }
}

using NUnit.Framework;

[Property("datadog_itr_unskippable", "")]
public class MyTestSuite
{
  [Test]
  public void MyTest()
  {
    // ...
  }
}

using Microsoft.VisualStudio.TestTools.UnitTesting;

[TestClass]
public class MyTestSuite
{
  [TestMethod]
  [TestProperty("datadog_itr_unskippable", null)]
  public void MyTest()
  {
    // ...
  }
}

Further Reading

Additional helpful documentation, links, and articles:

Explore Test Results and PerformanceDOCUMENTATION Troubleshooting CI VisibilityDOCUMENTATION