in src/OpenTelemetryEngineTests/Traces/FunctionsActivityBuilderTests.cs [83:95]
public void StopActivity_StopsActivity()
{
string activityName = Guid.NewGuid().ToString();
var startActivityResponse = FunctionsActivityBuilder.StartActivity(activityName);
Assert.NotNull(startActivityResponse);
Assert.NotNull(startActivityResponse.activity);
Assert.False(startActivityResponse.activity.IsStopped);
FunctionsActivityBuilder.StopActivity(startActivityResponse);
Assert.True(startActivityResponse.activity.IsStopped);
}