Question

我每次运行应用程序时都需要一些视频文件。它检查HD可用空间是否小于1千兆字节，如果为真则继续删除最旧的日期文件，依此类推，直到有足够的可用空间为止。

        foreach (DriveInfo drive in DriveInfo.GetDrives())
        {
            if (drive.IsReady && drive.Name == "E:\\")
            {
                if (drive.TotalFreeSpace < 10000000)
                {
                    do
                    {
                        DirectoryInfo info = new DirectoryInfo(@"E:\REC\Video\");
                        FileInfo[] files = info.GetFiles().OrderBy(p => p.LastWriteTime).ToArray();
                        System.IO.File.Delete(@"E:\REC\Video\" + files[0].Name);
                    }
                    while (drive.TotalFreeSpace < 10000000);
                }
            }
        }

vidofiles会在几个月内自动生成（录音）。
那么：如何测试此代码而不必等到我的磁盘空间已满？

Answer 1

我测试了它，我更换10000000，所以我右键单击驱动器并复制当前的空闲空间添加一些字节，它工作，我不得不改变它，就像这样：

            foreach (DriveInfo drive in DriveInfo.GetDrives())
        {
            if (drive.IsReady && drive.Name == "E:\\")
            {
                if (drive.TotalFreeSpace <= 245000000000000)
                {
                    try
                    {
                        while (drive.TotalFreeSpace <= 245000000000000)
                        {
                            DirectoryInfo info = new DirectoryInfo(@"E:\REC\Video\");
                            FileInfo[] files = info.GetFiles().OrderBy(p => p.LastWriteTime).ToArray();
                            System.IO.File.Delete(@"E:\REC\Video\" + files[0].Name);
                        }
                    }
                    catch
                    {
                    }
                }
            }
        }

Answer 2

我会将代码放在自己的方法中。将所需的磁盘空间放在参数中：

public class HdCleaner
{

    public static void DeleteOldestFiles(long minimumAvailableSpace, string path)
    {
        var driveLetter = Path.GetPathRoot(path);
        var drive1 = DriveInfo.GetDrives().Where(d => d.IsReady).Single(d => d.Name == driveLetter);

        while (drive1.TotalFreeSpace <= minimumAvailableSpace)
        {
            var info = new DirectoryInfo(path);
            var file = info.GetFiles().OrderBy(p => p.LastWriteTime).First();
            file.Delete();
        }
    }
}

进行测试进行单元测试：确保路径中有一些文件可以删除。

    [TestMethod]
    public void DeleteOldestFilesTest()
    {
        const string driveLetter = "C:\\";
        const string path = "C:\\Users\\user\\FileCleanerTest";
        var drive = DriveInfo.GetDrives().Where(d => d.IsReady).Single(d => d.Name == driveLetter);
        var availableSpace = drive.TotalFreeSpace;
        var neededSpace = availableSpace + 10000;

        HdCleaner.DeleteOldestFiles(neededSpace,  path);

        var newAvailableSpace = drive.TotalFreeSpace;

        Assert.IsTrue(newAvailableSpace >= neededSpace);
    }

P.S。：我做了一些重构;）

如何测试需要大文件的代码

2 个答案: