public void CleanFolder()
{
var folder = "C:\\Test\\ArchiveTest";
var file1 = $"{folder}\\TestDelete1.xlsx";
var file2 = $"{folder}\\TestDelete2.xlsx";
var file3 = $"{folder}\\TestDelete3.xlsx";
var daysOld = 5;
Directory.CreateDirectory(folder);
if (Directory.Exists(folder))
{
Directory.GetFiles(folder, "*.*", SearchOption.TopDirectoryOnly).ToList().ForEach(f => File.Delete(f));
}
var fileStream1 = File.Create(file1);
var fileStream2 = File.Create(file2);
var fileStream3 = File.Create(file3);
fileStream1.Close();
fileStream2.Close();
fileStream3.Close();
File.SetLastWriteTime(file1, DateTime.Now.AddDays(-3));
File.SetLastWriteTime(file2, DateTime.Now.AddDays(-4));
File.SetLastWriteTime(file3, DateTime.Now.AddDays(-5));
FileUtilities.CleanFolder(folder, daysOld);
var files = Directory.GetFiles(folder);
Assert.AreEqual(files.First(), file1);
Assert.AreEqual(files.Last(), file2);
Assert.IsFalse(files.Contains(file3));
}