c# - 为单元测试创​​建 HttpPostedFileBase 实例

Question

我需要创建一个 HttpPostedFileBase 类对象的实例并将它传递给一个方法，但我找不到任何方法来实例化它。我正在创建一个测试用例来测试我的文件上传方法。

这是我的方法，它接受一个 HttpPostedFileBase 对象。我需要从我的测试用例类中调用它。我没有使用任何模拟库。

有没有简单的方法可以做到这一点？

[HttpPost]
public JsonResult AddVariation(HttpPostedFileBase file, string name, string comment, string description, decimal amount, string accountLineTypeID)
{
    var accountLineType = _fileService.GetAccountLineType(AccountLineType.Debit);
    if (Guid.Parse(accountLineTypeID) == _fileService.GetAccountLineType(AccountLineType.Credit).AccountLineTypeID)
    {
        amount = 0 - amount;
    }
    var info = new File()
    {
        FileID = Guid.NewGuid(),
        Name = name,
        Description = description,
        FileName = file.FileName,
        BuildID = Guid.Parse(SelectedBuildID),
        MimeType = file.ContentType,
        CreatedUserID = CurrentUser.UserID,
        UpdatedUserID = CurrentUser.UserID,
        Amount = amount,
    };
    var cmmnt = new Comment()
    {
        CommentDate = DateTime.Now,
        CommentText = comment,
        FileID = info.FileID,
        UserID = CurrentUser.UserID
    };
    _variationService.AddVariation(info, file.InputStream);
    _variationService.AddComment(cmmnt);
    return Json("Variation Added Sucessfully", JsonRequestBehavior.AllowGet);
}

Answer 1

HttpPostedFileBase 是一个抽象类，因此不能直接实例化。

创建一个派生自 HttpPostedFileBase 的类并返回您要查找的值。

    class MyTestPostedFileBase : HttpPostedFileBase
{
Stream stream;
string contentType;
string fileName;

public MyTestPostedFileBase(Stream stream, string contentType, string fileName)
{
    this.stream = stream;
    this.contentType = contentType;
    this.fileName = fileName;
}

public override int ContentLength
{
    get { return (int)stream.Length; }
}

public override string ContentType
{
    get { return contentType; }
}

public override string FileName
{
    get { return fileName; }
}

public override Stream InputStream
{
    get { return stream; }
}

public override void SaveAs(string filename)
{
    throw new NotImplementedException();
}
}