private static void RegisterServices()
{
_container = new MyIoCContainer();
_container.AddSingleton <IGreetingService, HelloWorldService>();
}
public void RegistersItselfAsIServiceProvider()
{
_sut.AddSingleton <ISparkPlug, SparkPlug>();
_sut.AddSingleton <ICylinder, Cylinder>();
var serviceProvider = _sut.GetService <IServiceProvider>();
Assert.Equal(_sut, serviceProvider);
Assert.IsAssignableFrom <IServiceProvider>(serviceProvider);
}