'System.Web.Mvc.ViewEngines'的类型初始化程序引发了异常

Question

我试图单元测试一个具有controllercontext参数的void方法,还有一些用于发送电子邮件.电子邮件模板使用视图引擎渲染局部视图 我模拟了controllercontext.因此,渲染视图会抛出异常,因为ControllerContext具有null值.

public static string RenderViewToString(ControllerContext context, string viewPath, object model, bool partial = false)
        {
            var viewEngineResult = partial ? ViewEngines.Engines.FindPartialView(context, viewPath) : ViewEngines.Engines.FindView(context, viewPath, null);

            if (viewEngineResult == null)
                throw new FileNotFoundException("View cannot be found.");

            var view = viewEngineResult.View;
            context.Controller.ViewData.Model = model;

            var result = String.Empty;

            using (var sw = new StringWriter())
            {
                var ctx = new ViewContext(context, view,
                                            context.Controller.ViewData,
                                            context.Controller.TempData,
                                            sw);
                view.Render(ctx, sw);
                result = sw.ToString();
            }

            return result;
        }

Answer 1

您只需要在Nuget Package Manager中的测试解决方案中安装Microsoft.Asp.Net.WebPages并尝试构建您的解决方案,然后您的单元测试就能正常运行.