用SystemWrapper和Rhino进行单元测试

Question

我有一种方法对某个文件进行备份：

 public void MakeBackup(IFileWrap file, string path)
    {
        if (path  == null)
            throw new ArgumentNullException();

        Console.WriteLine();

        string backups = Environment.CurrentDirectory + @"\Backups\";

        if (!Directory.Exists(backups))
            Directory.CreateDirectory(backups);

        if (file.Exists(path))
        {
            file.Copy(path,backups + Path.GetFileName(path),overwrite: true);
            Console.WriteLine("Backup of the " + Path.GetFileName(path) + " lies in the " + backups);
        }


}

我试着用SystemWrapper和Rhino来测试它：

[TestMethod]
    public void MakeBackupTest()
    {
        IFileWrap fileRepository = MockRepository.GenerateMock<IFileWrap>();

        fileRepository.Expect(x => x.Exists(@"G:\1.txt"));
        fileRepository.Expect(x => x.Copy(@"G:\1.txt", Environment.CurrentDirectory + @"\Backups\1.txt", overwrite: true));

        new Windows().MakeBackup(fileRepository,@"G:\1.txt");


        fileRepository.VerifyAllExpectations();

    }

上述测试失败。我做错了什么？

Answer 1

您没有为fileRepository.Exists设置返回值-默认为false。应该是这样的：

fileRepository.Expect(x => x.Exists(@"G:\1.txt")).Return(true);