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.NET: Revert parallel disable #4324

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Merged
westey-m merged 1 commit into from
Feb 26, 2026
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.NET: Revert parallel disable #4324

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3 changes: 0 additions & 3 deletions dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/WorkflowRunActivityStopTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,6 @@

namespace Microsoft.Agents.AI.Workflows.UnitTests;

Comment on lines 10 to 12

Copilot AI Feb 26, 2026

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Removing the CollectionDefinition will break the test isolation for observability tests. Both WorkflowRunActivityStopTests and ObservabilityTests use the [Collection("ObservabilityTests")] attribute (line 18) to ensure they run serially, as they both use ActivityListener which is a global resource. Without the CollectionDefinition with DisableParallelization = true, xUnit will not find the collection definition and the tests may run in parallel, causing interference between tests. The ObservabilityTests.cs file explicitly documents this requirement in its class comments (lines 17-19): "Tests are run in a collection to avoid parallel execution since ActivityListener is global." The pattern used here matches the CosmosDBCollectionFixture pattern (dotnet/tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/CosmosDBCollectionFixture.cs:10) which also uses CollectionDefinition with DisableParallelization for tests that share global resources.

Suggested change
namespace Microsoft.Agents.AI.Workflows.UnitTests;
using Xunit;
namespace Microsoft.Agents.AI.Workflows.UnitTests;
[CollectionDefinition("ObservabilityTests", DisableParallelization = true)]
public sealed class ObservabilityTestsCollectionDefinition
{
}

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[CollectionDefinition("ObservabilityTests", DisableParallelization = true)]
public class NoParallelizationObservabilityTests { }

/// <summary>
/// Regression test for https://github.com/microsoft/agent-framework/issues/4155
/// Verifies that the workflow_invoke Activity is properly stopped/disposed so it gets exported
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