[Test] public void TestRead()
{
using var f = new AggregateFileStream(Files);
var s = "abcdefghijklmnopqrstuvwxyz";
var bytes = Encoding.UTF8.GetBytes(s);
var offset = 5; // into 'bytes'
int pos = 0; // file pos
Assert.Equal((long)pos, f.Position);
var read = f.Read(bytes, offset, Content0.Length / 2);
Assert.Equal(Content0.Length / 2, read);
Assert.Equal((long)(pos + read), f.Position);
Assert.Equal(s.Substring(0, offset) + CombinedContent.Substring(pos, read) + s.Substring(offset + read), Encoding.UTF8.GetString(bytes));
s = Encoding.UTF8.GetString(bytes);
pos = CombinedContent.Length / 3;
f.Seek(pos, SeekOrigin.Begin);
Assert.Equal((long)pos, f.Position);
offset = 11;
read = f.Read(bytes, offset, Content1.Length);
Assert.Equal(Content1.Length, read);
Assert.Equal((long)(pos + read), f.Position);
Assert.Equal(s.Substring(0, offset) + CombinedContent.Substring(pos, read) + s.Substring(offset + read), Encoding.UTF8.GetString(bytes));
}
[Test] public void TestGeneral()
{
using var f = new AggregateFileStream(Files);
Assert.True(f.CanRead);
Assert.True(f.CanSeek);
Assert.False(f.CanWrite);
Assert.Equal((long)CombinedContent.Length, f.Length);
}
[Test] public void TestStream()
{
using (var f = new AggregateFileStream(Files))
using (var s = new FileStream(fileN, FileMode.Create, FileAccess.Write, FileShare.Read))
f.CopyTo(s);
var combined = File.ReadAllText(fileN);
Assert.Equal(CombinedContent, combined);
}
[Test] public void TestFileIndex()
{
using var f = new AggregateFileStream(Files);
Assert.Equal(0, f.FileIndexAtOffset(0));
Assert.Equal(0, f.FileIndexAtOffset(Content0.Length - 1));
Assert.Equal(1, f.FileIndexAtOffset(Content0.Length));
Assert.Equal(1, f.FileIndexAtOffset(Content0.Length + Content1.Length - 1));
Assert.Equal(2, f.FileIndexAtOffset(Content0.Length + Content1.Length));
Assert.Equal(2, f.FileIndexAtOffset(Content0.Length + Content1.Length + Content2.Length - 1));
}
[Test] public void TestPosition()
{
using var f = new AggregateFileStream(Files);
var bytes = Encoding.UTF8.GetBytes(CombinedContent);
var rnd = new Random(0);
for (int i = 0; i != bytes.Length; ++i)
{
var pos = rnd.Next(bytes.Length);
f.Position = pos;
Assert.Equal((int)bytes[pos], f.ReadByte());
}
}
[Test] public void TestReadByte()
{
var bytes = new List <byte>();
using (var f = new AggregateFileStream(Files))
{
for (;;)
{
var b = f.ReadByte();
if (b == -1)
{
break;
}
bytes.Add((byte)b);
}
}
Assert.Equal(CombinedContent, Encoding.UTF8.GetString(bytes.ToArray()));
}
/// <summary>Open the associated files making 'Stream' valid</summary>
public IFileSource Open()
{
Stream = new AggregateFileStream(m_filepaths, FileShare.ReadWrite | FileShare.Delete, file_options: FileOptions.RandomAccess);
return(this);
}
