痣和AppSettingsReader？

Question

我正在与痣一起写一些单元测试。我在网上搜索，但我没有看到有关如何使用莫尔拦截对AppSettingsReader.GetValue的调用的任何反应。

有人能用莫尔斯做到这一点吗？或者，我是否被迫在自己的班级中隔离呼叫，我可以注射或模拟？理想情况下，有一种方法可以直接使用Moles来拦截调用，因为我们并不想修改要测试的代码。

谢谢！

Answer 1

首先，我强烈建议转移到摩尔发行版本，被称为“假货和存根”，在.NET 4.5/C＃5 /的Visual Studio 2012

的System.Configurations命名空间与鼹鼠不兼容/假的类型，并且必须被桩住。要使用Moles框架创建存根，只需为System.Configuration.AppSettingsReader类型创建一个接口即可。 Moles编译器会自动将接口转换为Stub类型。

这里是您可以添加到您的项目接口：

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); 
    } 
} 

这里有一个存根类，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; 
    } 
    } 
}