public void StringTest_Part()
{
var a = "身无彩凤双飞翼，心有灵犀一点通。";
var b = new String('笑', 20);
var c = new String('风', 130);
var d = new String('电', 40000);
var idx = 0;
var writer = new MessagePackWriter(16);
writer.WriteString(a, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(a) + 2);
var reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadString().Is(a);
writer = new MessagePackWriter(16);
idx = 0;
writer.WriteStringWithCache(a, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(a) + 2);
reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadStringWithCache().Is(a);
writer = new MessagePackWriter(16);
idx = 0;
writer.WriteString(b, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(b) + 2);
reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadString().Is(b);
writer = new MessagePackWriter(16);
idx = 0;
writer.WriteStringWithCache(b, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(b) + 2);
reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadStringWithCache().Is(b);
writer = new MessagePackWriter(16);
idx = 0;
writer.WriteString(c, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(c) + 3);
reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadString().Is(c);
writer = new MessagePackWriter(16);
idx = 0;
writer.WriteString(d, ref idx);
idx.Is(Encoding.UTF8.GetByteCount(d) + 5);
reader = new MessagePackReader(writer.ToArray(idx));
reader.ReadString().Is(d);
}