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Fix Hierarchical tracing test broken by ForceDefaultIdFormat #3023

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Merged
MihaZupan merged 1 commit into from
Apr 28, 2026
Merged

Fix Hierarchical tracing test broken by ForceDefaultIdFormat #3023

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7 changes: 7 additions & 0 deletions test/ReverseProxy.FunctionalTests/DistributedTracingTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,13 @@ public async Task DistributedTracing_Works(ActivityIdFormat idFormat)
},
};

// Microsoft.ApplicationInsights (transitive dependency brought in by
// Microsoft.Testing.Extensions.Telemetry) sets Activity.ForceDefaultIdFormat = true
// globally, which forces every new Activity to use W3C format regardless of the
// parent activity's format. Disable the override so that child activities inherit
// the parent's format as they would in a normal application.
Activity.ForceDefaultIdFormat = false;

var clientActivity = new Activity("Foo");
clientActivity.SetIdFormat(idFormat);
clientActivity.TraceStateString = "Bar";
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