public void Commit_AfterSuccessfulCommit_CanReadCommittedData()
{
// "Random" test data
var data1 = new byte[] { 7, 4, 1, 0, 8, 5, 2, 9, 6, 3 };
var data2 = new byte[] { 6, 1, 6, 8, 0, 3, 9, 7, 5, 1 };
IReopenableFileSystemCreator fsCreator = GetFileSystemCreator();
IFileSystem fs = fsCreator.Create();
// Make sure to test both directories and files
fs.CreateDirectory("/dir1".ToU8Span()).ThrowIfFailure();
fs.CreateDirectory("/dir2".ToU8Span()).ThrowIfFailure();
fs.CreateFile("/dir1/file".ToU8Span(), data1.Length, CreateFileOptions.None).ThrowIfFailure();
fs.CreateFile("/dir2/file".ToU8Span(), data2.Length, CreateFileOptions.None).ThrowIfFailure();
fs.OpenFile(out IFile file1, "/dir1/file".ToU8Span(), OpenMode.Write).ThrowIfFailure();
fs.OpenFile(out IFile file2, "/dir2/file".ToU8Span(), OpenMode.Write).ThrowIfFailure();
file1.Write(0, data1, WriteOption.Flush).ThrowIfFailure();
file2.Write(0, data2, WriteOption.Flush).ThrowIfFailure();
file1.Dispose();
file2.Dispose();
fs.Commit().ThrowIfFailure();
fs.Dispose();
// Reopen after committing
fs = fsCreator.Create();
var readData1 = new byte[data1.Length];
var readData2 = new byte[data2.Length];
Assert.Success(fs.OpenFile(out file1, "/dir1/file".ToU8Span(), OpenMode.Read));
using (file1)
{
Assert.Success(file1.Read(out long bytesRead, 0, readData1, ReadOption.None));
Assert.Equal(data1.Length, bytesRead);
}
Assert.Equal(data1, readData1);
Assert.Success(fs.OpenFile(out file2, "/dir2/file".ToU8Span(), OpenMode.Read));
using (file2)
{
Assert.Success(file2.Read(out long bytesRead, 0, readData2, ReadOption.None));
Assert.Equal(data2.Length, bytesRead);
}
Assert.Equal(data2, readData2);
}
public void Rollback_CreateFileThenCloseFs_FileDoesNotExist()
{
IReopenableFileSystemCreator fsCreator = GetFileSystemCreator();
IFileSystem fs = fsCreator.Create();
fs.CreateDirectory("/dir".ToU8Span()).ThrowIfFailure();
fs.CreateFile("/dir/file".ToU8Span(), 0, CreateFileOptions.None).ThrowIfFailure();
// Close without committing and reopen the file system
fs.Dispose();
fs = fsCreator.Create();
// Make sure the file and directory are gone
Assert.Result(ResultFs.PathNotFound, fs.GetEntryType(out _, "/dir".ToU8Span()));
Assert.Result(ResultFs.PathNotFound, fs.GetEntryType(out _, "/dir/file".ToU8Span()));
}
public void Rollback_AfterChangingExistingFiles_GoesBackToOriginalData()
{
// "Random" test data
var data1 = new byte[] { 7, 4, 1, 0, 8, 5, 2, 9, 6, 3 };
var data2 = new byte[] { 6, 1, 6, 8, 0, 3, 9, 7, 5, 1 };
IReopenableFileSystemCreator fsCreator = GetFileSystemCreator();
IFileSystem fs = fsCreator.Create();
fs.CreateDirectory("/dir".ToU8Span()).ThrowIfFailure();
fs.CreateFile("/dir/file".ToU8Span(), data1.Length, CreateFileOptions.None).ThrowIfFailure();
fs.OpenFile(out IFile file, "/dir/file".ToU8Span(), OpenMode.Write).ThrowIfFailure();
file.Write(0, data1, WriteOption.Flush).ThrowIfFailure();
file.Dispose();
// Commit and reopen the file system
fs.Commit().ThrowIfFailure();
fs.Dispose();
fs = fsCreator.Create();
// Make changes to the file
fs.OpenFile(out file, "/dir/file".ToU8Span(), OpenMode.Write).ThrowIfFailure();
file.Write(0, data2, WriteOption.Flush).ThrowIfFailure();
file.Dispose();
Assert.Success(fs.Rollback());
// The file should contain the original data after the rollback
var readData = new byte[data1.Length];
Assert.Success(fs.OpenFile(out file, "/dir/file".ToU8Span(), OpenMode.Read));
using (file)
{
Assert.Success(file.Read(out long bytesRead, 0, readData, ReadOption.None));
Assert.Equal(data1.Length, bytesRead);
}
Assert.Equal(data1, readData);
}
