public static PocketContainer DefaultToJsonSnapshots(this PocketContainer container)
{
return(container.AddStrategy(type =>
{
if (type.IsInterface &&
type.IsGenericType)
{
if (type.GetGenericTypeDefinition() == typeof(ICreateSnapshot <>))
{
var snapshotCreatorType = typeof(JsonSnapshotter <>)
.MakeGenericType(type.GetGenericArguments().Single());
return c => c.Resolve(snapshotCreatorType);
}
if (type.GetGenericTypeDefinition() == typeof(IApplySnapshot <>))
{
var snapshotCreatorType = typeof(JsonSnapshotter <>)
.MakeGenericType(type.GetGenericArguments().Single());
return c => c.Resolve(snapshotCreatorType);
}
}
return null;
}));
}
public void Default_construction_strategy_can_be_overridden_example_1_implicit_IEnumerable_support()
{
var container = new PocketContainer()
.Register(c => "good day!")
.Register(c => 456);
// when someone asks for an IEnumerable<T> give back a List<T> containing the registered value
container.AddStrategy(type =>
{
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
return(c =>
{
var singleInstanceType = type.GetGenericArguments().Single();
var listType = typeof(List <>).MakeGenericType(singleInstanceType);
var list = Activator.CreateInstance(listType);
var resolved = c.Resolve(singleInstanceType);
((dynamic)list).Add((dynamic)resolved);
return list;
});
}
return(null);
});
var strings = container.Resolve <IEnumerable <string> >();
var ints = container.Resolve <IEnumerable <int> >();
Console.WriteLine(strings);
Console.WriteLine(ints);
ints.Single().Should().Be(456);
strings.Single().Should().Be("good day!");
}
public void Registering_is_invoked_when_lazy_registration_occurs()
{
var receivedDelegates = new List <Delegate>();
var container = new PocketContainer();
container.Registering += (type, f) =>
{
receivedDelegates.Add(f);
return(f);
};
container.AddStrategy(type =>
{
if (type == typeof(string))
{
return(c => "hello");
}
return(null);
});
container.Resolve <string>();
receivedDelegates
.Should()
.HaveCount(1);
receivedDelegates
.Single()
.Should()
.BeOfType <Func <PocketContainer, object> >();
}
internal static PocketContainer RegisterDefaultClockName(this PocketContainer container) =>
container.AddStrategy(t =>
{
if (t == typeof(GetClockName))
{
return(c => new GetClockName(e => CommandScheduler.Clock.DefaultClockName));
}
return(null);
});
internal static PocketContainer AddFallbackToDefaultClock(this PocketContainer container)
{
return(container.AddStrategy(t =>
{
if (t == typeof(GetClockName))
{
return c => new GetClockName(e => CommandScheduler.SqlCommandScheduler.DefaultClockName);
}
return null;
}));
}
/// <summary>
/// Uses Its.Configuration to resolve unregistered types whose name ends with "Settings".
/// </summary>
/// <param name="container">The container.</param>
/// <returns>The same container instance.</returns>
public static PocketContainer UseItsConfigurationForSettings(
this PocketContainer container)
{
return(container.AddStrategy(type =>
{
if (!type.IsInterface &&
!type.IsAbstract &&
!type.IsGenericTypeDefinition &&
type.Name.EndsWith("Settings"))
{
return c => Settings.Get(type);
}
return null;
}));
}
public static PocketContainer UseImmediateCommandScheduling(this PocketContainer container)
{
return(container.AddStrategy(type =>
{
if (type.IsInterface &&
type.IsGenericType &&
type.GetGenericTypeDefinition() == typeof(ICommandScheduler <>))
{
var targetType = type.GetGenericArguments().First();
var schedulerType = typeof(CommandScheduler <>).MakeGenericType(targetType);
return c => c.Resolve(schedulerType);
}
return null;
}));
}
public static PocketContainer IfOnlyOneImplementationUseIt(
this PocketContainer container)
{
return(container.AddStrategy(type =>
{
if (type.IsInterface || type.IsAbstract)
{
var implementations = Discover.ConcreteTypesDerivedFrom(type)
.ToArray();
if (implementations.Count() == 1)
{
var implementation = implementations.Single();
return c => c.Resolve(implementation);
}
}
return null;
}));
}
public void Explicitly_registered_instances_are_not_overwritten_by_overriding_the_default_construction_strategy()
{
var ints = Observable.Return(123);
var container = new PocketContainer()
.Register(c => ints);
// when someone asks for an unregistered interface, generate a mock
container.AddStrategy(type => c =>
{
if (type.IsInterface)
{
dynamic mock = Activator.CreateInstance(typeof(Mock <>).MakeGenericType(type));
return(mock.Object);
}
return(null);
});
container.Resolve <IObservable <string> >().Should().NotBeNull();
container.Resolve <IObservable <int> >().Should().BeSameAs(ints);
}
public void When_a_strategy_has_resolved_an_unregistered_type_then_TryRegister_T_will_not_overwrite_it()
{
var container = new PocketContainer();
container.AddStrategy(type =>
{
if (typeof(string) == type)
{
return(c => "one");
}
return(null);
});
// trigger the strategy
container.Resolve <string>();
container.TryRegister(c => "two");
container.Resolve <string>().Should().Be("one");
}
public void A_strategy_can_be_used_to_register_a_singleton()
{
var container = new PocketContainer();
container.AddStrategy(type =>
{
if (type == typeof(IList <string>))
{
container.RegisterSingle <IList <string> >(c => new List <string>());
return(c => c.Resolve <IList <string> >());
}
return(null);
});
var list1 = container.Resolve <IList <string> >();
var list2 = container.Resolve <IList <string> >();
list1.Should().BeSameAs(list2);
}
public void Default_construction_strategy_can_be_overridden_example_2_auto_mocking()
{
var container = new PocketContainer();
// when someone asks for an IEnumerable<T> give back a List<T> containing the registered value
container.AddStrategy(type =>
{
if (type.IsInterface)
{
return(c =>
{
dynamic mock = Activator.CreateInstance(typeof(Mock <>).MakeGenericType(type));
return mock.Object;
});
}
return(null);
});
var obj = container.Resolve <IObservable <string> >();
obj.Should().NotBeNull();
}
public static PocketContainer AddStoreStrategy(this PocketContainer container)
{
return(container.AddStrategy(type =>
{
if (type.IsInterface &&
type.IsGenericType &&
type.GetGenericTypeDefinition() == typeof(IStore <>))
{
var targetType = type.GetGenericArguments().First();
Type applierType;
if (typeof(IEventSourced).IsAssignableFrom(targetType))
{
applierType = typeof(IEventSourcedRepository <>).MakeGenericType(targetType);
return c => c.Resolve(applierType);
}
}
return null;
}));
}
public void Resolve_doesnt_result_in_cumulative_registrations()
{
var container = new PocketContainer();
container.AddStrategy(t =>
{
if (t == typeof(int))
{
var counter = 0;
return(c => ++ counter);
}
return(null);
});
var one = container.Resolve <int>();
var two = container.Resolve <int>();
Console.WriteLine(new { one, two });
Action resolveEnumerable = () => container.Resolve <IEnumerable <int> >();
resolveEnumerable.ShouldThrow <ArgumentException>();
}
public void Explicitly_registered_instances_are_not_overwritten_by_overriding_the_default_construction_strategy()
{
var ints = Enumerable.Range(1, 123);
var container = new PocketContainer()
.Register(c => ints);
// when someone asks for an unregistered IEnumerable, return a list
container.AddStrategy(type => c =>
{
if (type.GetTypeInfo().IsInterface)
{
return(Activator.CreateInstance(typeof(List <>)
.MakeGenericType(
type.GetTypeInfo()
.GenericTypeArguments
.Single())));
}
return(null);
});
container.Resolve <IEnumerable <string> >().Should().NotBeNull();
container.Resolve <IEnumerable <int> >().Should().BeSameAs(ints);
}
public void When_an_added_strategy_returns_null_then_it_falls_back_to_the_default()
{
var container = new PocketContainer()
.Register(c => "still here");
// when someone asks for an IEnumerable<T> give back a List<T> containing the registered value
container.AddStrategy(type =>
{
if (type.GetTypeInfo().IsInterface)
{
return(c =>
{
dynamic mock = Activator.CreateInstance(typeof(List <>).MakeGenericType(type));
return mock.Object;
});
}
return(null);
});
var obj = container.Resolve <HasOneParamCtor <string> >();
obj.Should().NotBeNull();
obj.Value1.Should().Be("still here");
}
public TestTargetRegistry Add(
string environment,
string application,
Uri baseAddress,
Action <TestDependencyRegistry> testDependencies = null)
{
if (baseAddress == null)
{
throw new ArgumentNullException(nameof(baseAddress));
}
if (!baseAddress.IsAbsoluteUri)
{
throw new ArgumentException("Base address must be an absolute URI.");
}
if (string.IsNullOrWhiteSpace(environment))
{
throw new ArgumentException("Value cannot be null or whitespace.", nameof(environment));
}
if (string.IsNullOrWhiteSpace(application))
{
throw new ArgumentException("Value cannot be null or whitespace.", nameof(application));
}
var container = new PocketContainer()
.Register(c => new HttpClient())
.RegisterSingle(c => new TestTarget(c.Resolve)
{
Application = application,
Environment = environment,
BaseAddress = baseAddress
});
if (services != null)
{
// fall back to application's IServiceProvider
container.AddStrategy(type =>
{
if (typeof(IPeakyTest).IsAssignableFrom(type))
{
return(null);
}
return(c => services.GetRequiredService(type));
});
}
testDependencies?.Invoke(new TestDependencyRegistry((t, func) => container.Register(t, c => func())));
container.AfterCreating <HttpClient>(client =>
{
if (client.BaseAddress == null)
{
client.BaseAddress = baseAddress;
}
return(client);
});
targets.Add($"{environment}:{application}",
new Lazy <TestTarget>(() => container.Resolve <TestTarget>()));
return(this);
}
