控制器操作的ASP.NET核心集成測試

Microsoft文檔（https://docs.microsoft.com/en-us/aspnet/core/testing/integration-testing）解釋瞭如何使用TestServer類實現集成測試。我們使用WEB API很容易，因爲我們將序列化模型作爲操作的響應。控制器操作的ASP.NET核心集成測試

但是，如果我想測試返回包含一些數據的HTML視圖的Controller操作，我該如何評估頁面內容是我期望的（避免掃描HTML頁面內容）？

來源

2017-02-22 Markus

一個選擇是使用類似硒使用自動化UI測試

來源

2017-02-22 09:10:48 n00b

一個你已經設置好你的WebHostBuilder以及TESTSERVER對象，你可以附加到你的HTML渲染頁面用於創建的JSON序列模型查看內容。例如：

<!DOCTYPE html> 
<html> 
<head></head> 
<body>  
    <div>Subject</div><div>Kiss Me</div> 
    <div>Message</div><div>Ciao</div> 
</body> 
</html> 

<script type="model/json"> 
    {"Date":"2017-02-22","Subject":"Kiss Me","Result":true,"Message":"Ciao"} 
</script>

然後在您的測試中，只需要創建一個通用的方法來反序列化模型：

public const string StartViewModelContainer = "<script type=\"model/json\">"; 
    public const string EndViewModelContainer = "</script>"; 

    protected virtual T GetModel<T>(string responseContent) 
    { 
     var result = default(T); 

     if (!string.IsNullOrWhiteSpace(responseContent)) 
     { 
      var index = responseContent.IndexOf(StartViewModelContainer, 0, StringComparison.InvariantCulture); 
      if (index > 0) 
      { 
       var startingPosition = index + StartViewModelContainer.Length; 

       var endingPosition = responseContent.IndexOf(
        EndViewModelContainer, 
        startingPosition, 
        StringComparison.InvariantCulture); 

       if (endingPosition <= startingPosition) return result; 

       var jSonModel = responseContent.Substring(startingPosition, endingPosition - startingPosition); 
       result = JsonConvert.DeserializeObject<T>(jSonModel); 
      } 
     } 

     return result; 
    }

後使用它來評估的結果。假設從視圖中使用的視圖模型是「GreetingViewModel」，只是做：

  var greetingViewModel = GetModel<GreetingViewModel>(resonseContent); 

      Assert.AreEqual(greetingViewModel.Message, "Ciao"); 
      Assert.AreEqual(greetingViewModel.Subject, "Kiss Me");

爲了這個JSON序列化的視圖模型添加到您的網頁，我實現了以下過濾器：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using Microsoft.AspNetCore.Http; 
using Microsoft.AspNetCore.Mvc; 
using Microsoft.AspNetCore.Mvc.Filters; 
using Microsoft.AspNetCore.Mvc.ModelBinding; 
using Newtonsoft.Json; 
using Ticketino.Web.Components.Extensions.Request; 
using Ticketino.Web.OnlineShop.Serializations; 
using Ticketino.Web.OnlineShop.ViewModels.Base; 

namespace Ticketino.Web.OnlineShop.Filters 
{ 
    /// <summary> 
    /// This is a filter used only for integration tests. 
    /// It format the ViewModel as jSon and appends it to the end of HMTL page, so that it can be deserialized from the test in order to check its values. 
    /// </summary> 
    /// <seealso cref="Microsoft.AspNetCore.Mvc.Filters.ResultFilterAttribute" /> 
    [AttributeUsage(AttributeTargets.Method)] 
    public class IntegrationTestFilterAttribute : ResultFilterAttribute 
    { 
     public const string StartViewModelContainer = "<script type=\"model/json\">"; 
     public const string EndViewModelContainer = "</script>"; 

     public override void OnResultExecuting(ResultExecutingContext filterContext) 
     { 
      if (!filterContext.ModelState.IsValid) 
      { 
       var viewResult = filterContext.Result as ViewResult; 
       if (viewResult?.Model is BaseViewModel) 
       { 
        var errors = IntegrationTestFilterAttribute.GetModelErrors(filterContext.ModelState); 
        ((BaseViewModel)viewResult.Model).ValidationErrors = errors; 
       } 
      } 

      base.OnResultExecuting(filterContext); 
     } 

     public override void OnResultExecuted(ResultExecutedContext filterContext) 
     { 
      if (!filterContext.HttpContext.Request.IsAjaxRequest()) 
      { 
       var viewResult = filterContext.Result as ViewResult; 
       if (viewResult?.Model != null) 
       { 
        var jsonViewModel = string.Concat(
         IntegrationTestFilterAttribute.StartViewModelContainer, 
         JsonConvert.SerializeObject(viewResult.Model, Formatting.None, CommonJsonSerializerSettings.Settings()), 
         IntegrationTestFilterAttribute.EndViewModelContainer); 

        filterContext.HttpContext.Response.WriteAsync(jsonViewModel); 
       } 
      } 

      base.OnResultExecuted(filterContext); 
     } 

     #region Private methods 

     private static IDictionary<string, string> GetModelErrors(ModelStateDictionary errDictionary) 
     { 
      var errors = new Dictionary<string, string>(); 

      //get all entries from the ModelStateDictionary that have any errors and add them to our Dictionary 
      errDictionary.Where(k => k.Value.Errors.Count > 0).ForEach(i => 
      { 
       foreach (var errorMessage in i.Value.Errors.Select(e => e.ErrorMessage)) 
       { 
        errors.Add(i.Key, errorMessage); 
       } 
      }); 

      return errors; 
     } 

     #endregion 
    } 
}

然後，在ConfigureServices（IServiceCollection serviceCollection）方法中，在運行集成測試時將其注入，如下所示：

 // Filter to append json serialized view model to buttom html response page, in order to eveluate from integration test class 
     if (_hostingEnvironment.IsIntegrationTest()) 
     { 
      mvcBuilder.AddMvcOptions(opt => { opt.Filters.Add(new IntegrationTestFilterAttribute()); }); 
     }

來源

2017-02-22 09:23:21

控制器操作的ASP.NET核心集成測試

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