public void WHEN_known_provider_name_SHOULD_retrieve_instance()
{
//Arrange
var registry = _container.Get <IPaymentProviderRegistry>();
var providerName = GetRandom.String(15);
registry.RegisterProvider(providerName, typeof(FakePaymentProvider));
var mockResolver = _container.GetMock <IDependencyResolver>();
mockResolver.Setup(dr => dr.Resolve(It.IsNotNull <Type>()))
.Returns(new FakePaymentProvider());
var sut = _container.CreateInstance <PaymentProviderFactory>();
//Act
IPaymentProvider provider = sut.ResolveProvider(providerName);
//Assert
provider.Should().NotBeNull();
provider.ProviderName.Should().Be(providerName);
}