public void GetAutoLazyService_returns_object_of_correct_type([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
var lazy = new Lazy <IServiceInterface>(() => new ServiceImplementation());
Assert.That(() => sut.GetAutoLazyService(lazy),
Is.InstanceOf <IServiceInterface>());
}
public void GetAutoLazyService_uses_logic_from_lazy_impl_for_methods([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
var lazy = new Lazy <IServiceInterface>(() => new ServiceImplementation());
var service = sut.GetAutoLazyService(lazy);
// The logic in the service is to return a number equal to the lengths of both input strings, added together
Assert.That(() => service.GetNumber("1234", "56789"), Is.EqualTo(9));
}
public void GetAutoLazyService_does_not_construct_real_impl_when_not_used([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
ServiceImplementation.ConstructionCount = 0;
var lazy = new Lazy <IServiceInterface>(() => new ServiceImplementation());
sut.GetAutoLazyService(lazy);
Assert.That(ServiceImplementation.ConstructionCount, Is.Zero);
}
public void GetAutoLazyService_constructs_impl_once_after_first_usage([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
ServiceImplementation.ConstructionCount = 0;
var lazy = new Lazy <IServiceInterface>(() => new ServiceImplementation());
var service = sut.GetAutoLazyService(lazy);
service.GetString();
Assert.That(ServiceImplementation.ConstructionCount, Is.EqualTo(1));
}
public void GetAutoLazyService_throws_exception_if_used_with_abstract_class([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
var lazy = new Lazy <AnAbstractClass>(() => new AbstractClassImpl());
Assert.That(() => sut.GetAutoLazyService(lazy), Throws.InstanceOf <AutoLazyException>());
}
public void GetAutoLazyService_constructs_impl_again_for_different_autolazy_instance([IntegratedServiceFactory] IGetsAutoLazyServices sut)
{
ServiceImplementation.ConstructionCount = 0;
var lazy1 = new Lazy <IServiceInterface>(() => new ServiceImplementation());
var lazy2 = new Lazy <IServiceInterface>(() => new ServiceImplementation());
var service1 = sut.GetAutoLazyService(lazy1);
var service2 = sut.GetAutoLazyService(lazy2);
service1.GetString();
service2.GetString();
Assert.That(ServiceImplementation.ConstructionCount, Is.EqualTo(2));
}
