public void InitializeSetsIsFirstForTelemetryUsingIdFromRequestTelemetry()
{
var telemetry = new EventTelemetry("name");
var source = new TestableSessionTelemetryInitializer();
var context = source.FakeContext.CreateRequestTelemetryPrivate();
context.Context.Session.IsFirst = true;
source.Initialize(telemetry);
Assert.IsTrue(telemetry.Context.Session.IsFirst.HasValue);
Assert.IsTrue(telemetry.Context.Session.IsFirst.Value);
}