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Ninject Scoping Learnings and Tests to accompany http://stackoverflow.com/a/15836383/11635
public static class NinjectScopingLearning
{
public static class InParentScope
{
[Fact]
public static void WorksIffParentScopeAllWayUp()
{
var kernel = new StandardKernel();
kernel.Bind<Root>().ToSelf().InSingletonScope();
kernel.Bind<Child>().ToSelf().InParentScope();
kernel.Bind<DisposableLeaf>().ToSelf().InParentScope();
var root = kernel.Get<Root>();
kernel.Components.Get<ICache>().Clear( root );
Assert.True( root.Child.Leaf.IsDisposed );
}
}
public static class InCallScope
{
[Fact]
public static void ClearRootWorks()
{
var kernel = new StandardKernel();
kernel.Bind<DisposableLeaf>().ToSelf().InCallScope();
var root = kernel.Get<Root>();
kernel.Components.Get<ICache>().Clear( root );
Assert.True( root.Child.Leaf.IsDisposed );
}
[Fact( Skip = "No longer works on Unstable due to fixes to InCallScope" )]
public static void ClearRootDisposesAllChilrenCreatedWithContextPreservingGet()
{
var kernel = new StandardKernel();
kernel.Bind<Child>().ToSelf()
.InCallScope()
.WithConstructorArgument( "leaf", ctx => ctx.ContextPreservingGet<DisposableLeaf>() );
kernel.Bind<DisposableLeaf>().ToSelf().InCallScope();
var root = kernel.Get<Root>();
kernel.Components.Get<ICache>().Clear( root );
Assert.True( root.Child.Leaf.IsDisposed );
}
[Fact]
public static void DisposeKernelWorks()
{
var kernel = new StandardKernel();
kernel.Bind<DisposableLeaf>().ToSelf().InCallScope();
var root = kernel.Get<Root>();
kernel.Dispose();
Assert.True( root.Child.Leaf.IsDisposed );
}
}
public static class DefinesNamedScopeRoot
{
[Fact]
public static void WorksIffLeafIsSameNamedScope()
{
var kernel = new StandardKernel();
kernel.Bind<Root>().ToSelf().DefinesNamedScope( "a" );
kernel.Bind<DisposableLeaf>().ToSelf().InNamedScope( "a" );
var root = kernel.Get<Root>();
kernel.Components.Get<ICache>().Clear( root );
Assert.True( root.Child.Leaf.IsDisposed );
}
}
}
public static class RequestHandlerScoping
{
[Fact]
public static void InRequestScopedLeafIsDisposed()
{
var kernel = CreateKernelWithCqrsModule();
kernel.Bind<DisposableLeaf>().ToSelf().InRequestScope();
DispatchShouldDisposeLeaf( kernel );
}
[Fact]
public static void InRequestScopedLeafViaContextPreservingGetIsDisposed()
{
var kernel = CreateKernelWithCqrsModule();
kernel.Bind<Child>().ToSelf()
.WithConstructorArgument( "leaf", ctx => ctx.ContextPreservingGet<DisposableLeaf>() );
kernel.Bind<DisposableLeaf>().ToSelf().InRequestScope();
DispatchShouldDisposeLeaf( kernel );
}
[Fact]
public static void InRequestScopedLeafViaContextPreservingGetFromRequestScopedParentIsDisposed()
{
var kernel = CreateKernelWithCqrsModule();
kernel.Bind<Child>().ToSelf()
.InRequestScope()
.WithConstructorArgument( "leaf", ctx => ctx.ContextPreservingGet<DisposableLeaf>() );
kernel.Bind<DisposableLeaf>().ToSelf().InRequestScope();
DispatchShouldDisposeLeaf( kernel );
}
static void DispatchShouldDisposeLeaf( StandardKernel kernel )
{
var leaf = default( DisposableLeaf );
kernel.Get<IHandlerComposer>().ComposeCallDispose( typeof( Root ), instance => leaf = ((Root)instance).Child.Leaf );
Assert.True( leaf.IsDisposed );
}
static StandardKernel CreateKernelWithCqrsModule()
{
return new StandardKernel( new Module() );
}
}
public class Module : NinjectModule
{
public override void Load()
{
Bind<IHandlerComposer>().To<NinjectRequestScopedHandlerComposer>();
// Wire it up so InRequestScope will work for Handler scopes
Bind<INinjectRequestHandlerScopeFactory>().To<NinjectRequestHandlerScopeFactory>();
NinjectRequestHandlerScopeFactory.NinjectHttpApplicationPlugin.RegisterIn( Kernel );
}
}
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