in src/OpenTelemetryEngineTests/Traces/FunctionsActivityBuilderTests.cs [59:68]
public void StartActivity_CreatesValidActivity()
{
string activityName = Guid.NewGuid().ToString();
var startActivityResponse = FunctionsActivityBuilder.StartActivity(activityName);
Assert.NotNull(startActivityResponse);
Assert.NotNull(startActivityResponse.activity);
Assert.Equal(activityName, startActivityResponse.activity.DisplayName);
}