痣和AppSettingsReader？

Question

我正在與痣一起寫一些單元測試。我在網上搜索，但我沒有看到有關如何使用莫爾攔截對AppSettingsReader.GetValue的調用的任何反應。

有人能用莫爾斯做到這一點嗎？或者，我是否被迫在自己的班級中隔離呼叫，我可以注射或模擬？理想情況下，有一種方法可以直接使用Moles來攔截調用，因爲我們並不想修改要測試的代碼。

謝謝！

Answer 1

首先，我強烈建議轉移到摩爾發行版本，被稱爲「假貨和存根」，在.NET 4.5/C＃5 /的Visual Studio 2012

的System.Configurations命名空間與鼴鼠不兼容/假的類型，並且必須被樁住。要使用Moles框架創建存根，只需爲System.Configuration.AppSettingsReader類型創建一個接口即可。 Moles編譯器會自動將接口轉換爲Stub類型。

這裏是您可以添加到您的項目接口：

using System; 

namespace YOUR_NAMESPACE_HERE 
{ 
    /// <summary> 
    /// IOC object for stubbing System.Configuration.AppSettingsReader. 
    /// Provides a method for reading values of a particular type from 
    /// the configuration. 
    /// </summary> 
    interface IAppSettingsReader 
    { 
    /// <summary> 
    /// Gets the value for a specified key from the 
    /// System.Configuration.ConfigurationSettings.AppSettings property 
    /// and returns an object of the specified type containing the 
    /// value from the configuration. 
    /// </summary> 
    /// <param name="key">The key for which to get the value.</param> 
    /// <param name="type">The type of the object to return.</param> 
    /// <returns>The value of the specified key</returns> 
    /// <exception cref="System.ArgumentNullException">key is null. 
    /// - or - 
    /// type is null.</exception> 
    /// <exception cref="System.InvalidOperationException">key does 
    /// not exist in the &lt;appSettings&gt; configuration section. 
    /// - or - 
    /// The value in the &lt;appSettings&gt; configuration section 
    /// for key is not of type type.</exception> 
    public object GetValue(string key, Type type); 
    } 
} 

這裏有一個存根類，太：

using System; 
using System.Configuration; 

namespace YOUR_NAMESPACE_HERE 
{ 
    /// <summary> 
    /// Production stub for System.Configuration.AppSettingsReader. 
    /// Provides a method for reading values of a particular type from 
    /// the configuration. 
    /// </summary> 
    public class AppSettingsReaderStub : IAppSettingsReader 
    { 
    /// <summary> 
    /// Gets the value for a specified key from the 
    /// System.Configuration.ConfigurationSettings.AppSettings property 
    /// and returns an object of the specified type containing the value 
    /// from the configuration. 
    /// </summary> 
    /// <param name="key">The key for which to get the value.</param> 
    /// <param name="type">The type of the object to return.</param> 
    /// <returns>The value of the specified key</returns> 
    /// <exception cref="System.ArgumentNullException">key is null. 
    /// - or - 
    /// type is null.</exception> 
    /// <exception cref="System.InvalidOperationException">key does not 
    /// exist in the &lt;appSettings&gt; configuration section. 
    /// - or - 
    /// The value in the &lt;appSettings&gt; configuration section for 
    /// key is not of type type.</exception> 
    public object GetValue(string key, Type type) 
    { 
     var reader = new AppSettingsReader(); 
     object result = reader.GetValue(key, type); 
     return result; 
    } 
    } 
}