public void CanCreateSpecifyingTheServiceType()
{
ServiceDependencyAttribute attribute = new ServiceDependencyAttribute();
attribute.Type = typeof(TestService);
Assert.AreEqual(typeof(TestService), attribute.Type);
}
public void CanSetRequiredValue()
{
ServiceDependencyAttribute attribute = new ServiceDependencyAttribute();
Assert.IsTrue(attribute.Required);
attribute.Required = false;
Assert.IsFalse(attribute.Required);
}
protected override IDependencyResolverPolicy CreateResolver(ParameterInfo parameter)
{
var dependency = ServiceDependencyAttribute.GetServiceDependencies(parameter)
.SingleOrDefault();
if (dependency != null)
{
return(new NamedTypeDependencyResolverPolicy(parameter.ParameterType, dependency.Name));
}
return(new NamedTypeDependencyResolverPolicy(parameter.ParameterType, null));
}
/// <summary>
///
/// </summary>
/// <param name="il"></param>
/// <param name="paramAttr"></param>
/// <param name="parameterType"></param>
public override void EmitParameterResolution(ILGenerator il, ParameterAttribute paramAttr, Type parameterType)
{
ServiceDependencyAttribute attr = (ServiceDependencyAttribute)paramAttr;
MethodInfo getLocator = GetPropertyGetter <IBuilderContext>("Locator", typeof(IReadWriteLocator));
MethodInfo getFromLocator = ObtainGetFromLocatorMethod();
MethodInfo getServices =
GetPropertyGetter <CompositionContainer>("Services", typeof(IServiceCollection));
MethodInfo getFromServices = GetMethodInfo <IServiceCollection>("Get", typeof(Type), typeof(bool));
ConstructorInfo newDependencyKey =
GetConstructor <DependencyResolutionLocatorKey>(typeof(Type), typeof(string));
// context.get_Locator
il.Emit(OpCodes.Ldarg_0);
il.EmitCall(OpCodes.Callvirt, getLocator, null);
// new DependencyResolutionContainer(typeof(CompositionContainer), null)
EmitLoadType(il, typeof(CompositionContainer));
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Newobj, newDependencyKey);
// locator.Get(key)
il.EmitCall(OpCodes.Callvirt, getFromLocator, null);
il.Emit(OpCodes.Castclass, typeof(CompositionContainer));
// container.get_Services
il.EmitCall(OpCodes.Callvirt, getServices, null);
if (attr.Type != null)
{
EmitLoadType(il, attr.Type);
}
else
{
EmitLoadType(il, parameterType);
}
if (attr.Required)
{
il.Emit(OpCodes.Ldc_I4_1);
}
else
{
il.Emit(OpCodes.Ldc_I4_0);
}
il.EmitCall(OpCodes.Callvirt, getFromServices, null);
}