public void Create_WithDefaultHandler_GetProxyInstance()
{
var list = new Collection <object>()
{
new object()
};
var handler = DispatchProxyServices.DefaultHandler;
var pList = DispatchProxy <IList <object> > .Create(list, handler);
Assert.IsNotNull(pList);
Assert.IsInstanceOfType(pList, typeof(DispatchProxy <IList <object> >));
Assert.AreEqual(1, pList.Count);
}
/// <summary>
/// 使用指定的代理对象和代理委托创建 <see cref="DispatchProxy{TInterface}"/> 类的实例。
/// </summary>
/// <param name="instance">要代理的 <typeparamref name="TInterface"/> 类型的对象。</param>
/// <param name="handler">方法调用时所用的 <see cref="InvocationHandler"/> 代理委托。</param>
/// <returns>实现 <typeparamref name="TInterface"/> 接口的代理类型的对象。</returns>
/// <exception cref="ArgumentNullException"><paramref name="instance"/>
/// 或 <paramref name="handler"/> 为 <see langword="null"/>。</exception>
public static TInterface Create(TInterface instance, InvocationHandler handler)
{
if (instance is null)
{
throw new ArgumentNullException(nameof(instance));
}
if (handler is null)
{
throw new ArgumentNullException(nameof(handler));
}
var proxy = DispatchProxy.Create <TInterface, DispatchProxy <TInterface> >();
((DispatchProxy <TInterface>)(object) proxy).Instance = instance;
((DispatchProxy <TInterface>)(object) proxy).Handler = handler;
return(proxy);
}
public void Create_WithCallCountHandler_GetExpectedCount()
{
var list = new Collection <object?>()
{
new object()
};
var callCounts = new Dictionary <MethodInfo, int>();
var handler = (InvocationHandler)((instance, method, arguments) =>
{
callCounts[method] = callCounts.GetOrAdd(method, 0) + 1;
return(method.GetDynamicDelegate().Invoke(instance, arguments));
});
var pList = DispatchProxy <IList <object?> > .Create(list, handler);
Assert.AreEqual(0, callCounts.Count);
pList.Add(new object());
Assert.AreEqual(1, callCounts.Count);
Assert.AreEqual(2, pList.Count);
Assert.AreEqual(2, callCounts.Count);
pList[0] = null;
Assert.AreEqual(3, callCounts.Count);
Assert.IsNull(pList[0]);
Assert.AreEqual(4, callCounts.Count);
}
/// <summary>
/// 使用指定的代理对象和代理委托创建 <see cref="DispatchProxy{TInterface}"/> 类的实例。
/// </summary>
/// <typeparam name="TInterface">代理应实现的接口类型。</typeparam>
/// <param name="instance">要代理的 <typeparamref name="TInterface"/> 类型的对象。</param>
/// <param name="handler">方法调用时所用的 <see cref="InvocationHandler"/> 代理委托。</param>
/// <returns>实现 <typeparamref name="TInterface"/> 接口的代理类型的对象。</returns>
/// <exception cref="ArgumentNullException"><paramref name="instance"/>
/// 或 <paramref name="handler"/> 为 <see langword="null"/>。</exception>
public static TInterface CreateProxy <TInterface>(TInterface instance, InvocationHandler?handler = null)
where TInterface : class
{
handler ??= DispatchProxyServices.DefaultHandler;
return(DispatchProxy <TInterface> .Create(instance, handler));
}