ZipFile.TestArchive() returns true for empty file

[mochaloff]

Steps to reproduce

1. Create Empty *.txt file and rename extension to *.zip
2. Use OpenReadStream() and TestArchive(true, TestStrategy.FindFirstError, null)

Expected behavior

The method must return false

Actual behavior

Method returns true

Version of SharpZipLib

1.3.3

Obtained from (only keep the relevant lines)

• Package installed using NuGet

Notably, the method returns false if there is any information in the text file

My code:

public static bool IsCorrectZipFile(this IFormFile zipFile) //zipFile = emptyTxtFile.zip
{
    try
    {
        bool result;

        using (ZipFile zip = new ZipFile(zipFile.OpenReadStream()))
        {
            result = zip.TestArchive(true, TestStrategy.FindFirstError, null);
        }
        return result;
    }
    catch
    {
        return false;
    }
}