public void 断片化のストリームシークテスト()
{
var buf = GetRandam(100);
var header = GetRandam(20);
var last = GetRandam(20);
var writer = new MessageWriter();
writer.Set(1, 16);
writer.Write(buf, 0, buf.Length);
Assert.AreEqual(buf.Length, writer.Position);
writer.Seek(20, SeekOrigin.Current);
Assert.AreEqual(buf.Length + 20, writer.Position);
Assert.AreEqual(buf.Length + 20, writer.Length, "長さが拡張される");
writer.Seek(-10, SeekOrigin.Current);
Assert.AreEqual(buf.Length + 20, writer.Length, "長さはそのまま");
writer.SetLength(buf.Length);
Assert.AreEqual(buf.Length, writer.Length, "指定サイズになっている");
Assert.AreEqual(buf.Length, writer.Position, "短くなったので終端位置が変更される");
writer.Seek(0, SeekOrigin.Begin);
Assert.AreEqual(0, writer.Position);
writer.Write(header, 0, header.Length);
Assert.AreEqual(header.Length, writer.Position);
writer.Seek(-last.Length, SeekOrigin.End);
Assert.AreEqual(buf.Length - last.Length, writer.Position, "終端位置からのシーク");
writer.Write(last, 0, last.Length);
var list = new List <Fragment>();
writer.GetFragments(list);
var combine = header.Concat(buf.Skip(header.Length).Take(buf.Length - header.Length - last.Length)).Concat(last);
Assert.IsTrue(Equals(combine.ToArray(), list.ToBytes()), "再度結合しても問題ない");
list.TryReturn();
}
List <Fragment> GetStreamFragments(byte[] buf, short id, int size, int minWriteSize, int maxWriteSize)
{
var writer = new MessageWriter();
writer.Set(id, size);
int offset = 0;
while (offset < buf.Length)
{
var writeSize = minWriteSize + (int)(m_Random.NextDouble() * (maxWriteSize - minWriteSize));
if (offset + writeSize > buf.Length)
{
writeSize = buf.Length - offset;
}
writer.Write(buf, offset, writeSize);
offset += writeSize;
}
var list = new List <Fragment>();
writer.GetFragments(list);
return(list);
}
