public void PipelineCreatedOnlyOnce()
{
// Setup
var pipeline = new SpyPipeline();
SpyPolicy spy = new SpyPolicy();
SpyExtension extension = new SpyExtension(pipeline, Stage.Setup, spy, typeof(SpyPolicy));
IUnityContainerAsync Container = new UnityContainer()
.AddExtension(extension);
// Act
Container.ResolveAsync <object>();
Container.ResolveAsync <object>();
// Validate
Assert.AreEqual(1, pipeline.Count);
Assert.AreEqual(2, spy.Count);
}