public void Should_properly_read_ranges(int seed)
{
var r = new Random(seed);
var bytes = new byte[r.Next(128, 1024 * 1024 * 3)];
r.NextBytes(bytes);
var ms = new MemoryStream(bytes);
var max = r.Next(1, bytes.Length / 2);
var entireStream = new LimitedStream(ms, ms.Length, 0, 0);
Assert.Equal(bytes, entireStream.ReadData());
ms.Position = 0;
long overallRead = 0;
long position = 0;
var numberOfChunks = ms.Length / max + (ms.Length % max != 0 ? 1 : 0);
for (int i = 0; i < numberOfChunks; i++)
{
var pos = ms.Position;
var prev = Math.Min(pos + max, ms.Length);
var ls = new LimitedStream(ms, prev - pos, position, overallRead);
if (i == numberOfChunks - 1)
{
Assert.Equal(ms.Length % max, ls.Length);
}
else
{
Assert.Equal(max, ls.Length);
}
var read = ls.ReadData();
Assert.Equal(ls.Length, read.Length);
Assert.Equal(bytes.Skip((int)pos).Take(read.Length).ToArray(), read);
overallRead += read.Length;
position += prev - pos;
}
}