创建具有未经授权访问的子目录（用于单元测试）答案

【问题标题】：Create SubDirectory with unauthorized access (for unit test)创建具有未经授权访问的子目录（用于单元测试）
【发布时间】：2021-01-21 09:50:20
【问题描述】：

我必须为将在内部枚举文件和文件夹的类创建单元测试。

我当然想测试它是否正确处理未经授权访问的文件夹。

换句话说：我怀疑测试类中的方法之一会调用DirectoryInfo.EnumerateDirectories，我想确保跳过未经授权访问的文件夹。

所以我需要创建一个我的 TestObject 无权访问的文件夹。

[TestMethod]
[ExpectedException(typeof(SecurityException)]
public void HelpFileCollection_GetFiles_SkipsInaccessibleFolders()
{
    // Test: HelpFileCollection.GetFiles() will skip Folders that are not accessible
    // preparation: create a base Folder and a subfolder with limited security
    DirectoryInfo baseFolder = this.CreateTestFolder();
    DirectoryInfo subFolder = baseFolder.CreateDirectory(...      ??? 

    HelpFilderCollection testObject = new HelpFileCollection
    {
        RootFolder = baseFolder,
        IncludeSubFolders = true,
    }

    // Test: call GetFiles(); expect SecurityException
    testObject.GetFiles();
    Assert.Fail("HelpFileCollection.GetFiles() unexpectedly didn't throw SecurityException");
}

我应该怎么做才能使子文件夹无法访问？

【问题讨论】：

标签： c# unit-testing directoryinfo unauthorizedaccessexcepti

【解决方案1】：

创建一个文件夹的示例，当您调用“EnumerateDirectories”时将显示“访问被拒绝”错误：

            DirectoryInfo baseFolder = new DirectoryInfo("D:\\Test");
            DirectoryInfo subFolder = baseFolder.CreateSubdirectory("HelloWorld");
            var security = new System.Security.AccessControl.DirectorySecurity();
            security.AddAccessRule(new System.Security.AccessControl.FileSystemAccessRule(Environment.UserName, System.Security.AccessControl.FileSystemRights.FullControl, System.Security.AccessControl.AccessControlType.Deny));
            subFolder.SetAccessControl(security);
            //Get Access denied error
            subFolder.EnumerateDirectories();

【讨论】：