.net - 如何在 ASP.NET Web Api 中对操作过滤器进行单元测试？

Question

我希望向我的服务添加一个操作过滤器，以处理向响应消息添加链接数据。我发现我需要模拟 HttpActionExecutedContext，但这是一个很难模拟的类，您如何处理 Action Filter 测试？

Answer 1

您可以为HttpActionExecutedContext创建一个假的，如下所示:

public static HttpActionContext CreateActionContext(HttpControllerContext controllerContext = null, HttpActionDescriptor actionDescriptor = null)
{
    HttpControllerContext context = controllerContext ?? ContextUtil.CreateControllerContext();
    HttpActionDescriptor descriptor = actionDescriptor ?? new Mock<HttpActionDescriptor>() { CallBase = true }.Object;
    return new HttpActionContext(context, descriptor);
}

public static HttpActionExecutedContext GetActionExecutedContext(HttpRequestMessage request, HttpResponseMessage response)
{
    HttpActionContext actionContext = CreateActionContext();
    actionContext.ControllerContext.Request = request;
    HttpActionExecutedContext actionExecutedContext = new HttpActionExecutedContext(actionContext, null) { Response = response };
    return actionExecutedContext;
}

我刚刚从 ASP.NET Web API 源代码中复制并粘贴了该代码:ContextUtil类(class)。以下是他们如何测试一些内置过滤器的一些示例:

• AuthorizeAttributeTest

• ActionFilterAttributeTest

ActionFilterAttributeTest 是 ActionFilterAttribute 的测试类，它是一个抽象类，但您会明白的。