private void AttemptBackup(FileInfo f)
{
var version = new GenerationalFileBackupInfo(f);
if (versions.Contains(version))
return;
if(version.CurrentGeneration > maxBackups)
{
f.Delete();
return;
}
if (version.NextGeneration > maxBackups)
{
return;
}
FileInfo destination = version.NextFile;
if (destination.Exists)
{
destination.Delete();
}
versions.Add(version);
File.Copy(f.FullName, destination.FullName);
}
public void if_the_file_is_versioned_the_next_file_has_the_next_gen_appended_to_filename()
{
const string ROOT_FILE = "original.file.txt.1";
var version = new GenerationalFileBackupInfo(new FileInfo(ROOT_FILE));
Assert.AreEqual("original.file.txt.1", version.CurrentFile.Name);
Assert.AreEqual("original.file.txt.002", version.NextFile.Name);
}
public void if_the_file_is_versioned_the_currentGen_is_version_and_nextGen_is_incremented_by_1()
{
const string ROOT_FILE = "original.file.txt.1";
var version = new GenerationalFileBackupInfo(new FileInfo(ROOT_FILE));
Assert.AreEqual(1, version.CurrentGeneration);
Assert.AreEqual(2, version.NextGeneration);
}
public void if_the_file_is_not_versioned_the_currentGen_is_0_and_the_next_gen_is_1()
{
const string ROOT_FILE = "original.file.txt";
var version = new GenerationalFileBackupInfo(new FileInfo(ROOT_FILE));
Assert.AreEqual(0, version.CurrentGeneration);
Assert.AreEqual(1, version.NextGeneration);
}
public void if_at_max_backups_only_keep_newest()
{
FileInfo file = CreateFile();
var backup = new RollingFileBackup(file, 5);
IEnumerable<IFileBackupInfo> versions = new GenerationalFileBackupInfo[0];
for (int i = 0; i < 10; i++)
{
versions = backup.Create();
}
List<FileInfo> files = GetFiles();
//original + 5 backups
Assert.AreEqual(6, files.Count);
Assert.AreEqual(5, versions.Count());
}