public void ReadFromMultiSegments()
{
//----------------------------15----------------------------28
var js = "{\"I\":3,\"S\":\"sys.HelloService.Hello\",\"A\":[123, \"中国\"]}";
var data = System.Text.Encoding.UTF8.GetBytes(js);
var bs1 = new TestBytesSegment(15, null);
data.AsSpan(0, 15).CopyTo(bs1.Buffer.AsSpan()); //sys.的.之前
//var temp = MemoryPool<byte>.Shared.Rent(20);
var temp1 = new byte[100];
var bs2 = new TestBytesSegment(28, bs1);
data.AsSpan(15, 28).CopyTo(bs2.Buffer.AsSpan()); //123的3之前
var temp2 = new byte[100];
var bs3 = new TestBytesSegment(data.Length - 15 - 28, bs2);
data.AsSpan(15 + 28).CopyTo(bs3.Buffer.AsSpan());
//var jr = new Utf8JsonReader(data.AsSpan(0, 15), false, default); //sys.的.之前
var jr = new Utf8JsonReader(
new ReadOnlySequence <byte>(bs1, 0, bs3, bs3.Buffer.Length), false, default);
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.StartObject);
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.PropertyName &&
jr.ValueSpan.SequenceEqual(RequireIdPropertyName.AsSpan()));
Assert.True(jr.Read() && jr.GetInt32() == 3);
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.PropertyName &&
jr.ValueSpan.SequenceEqual(RequireServicePropertyName.AsSpan()));
Assert.True(jr.Read() && jr.GetString() == "sys.HelloService.Hello");
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.PropertyName &&
jr.ValueTextEquals("A"));
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.StartArray);
Assert.True(jr.Read() && jr.GetInt32() == 123);
Assert.True(jr.Read() && jr.GetString() == "中国");
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.EndArray);
Assert.True(jr.Read() && jr.TokenType == JsonTokenType.EndObject);
Assert.True(!jr.Read());
//Assert.Equal(jr.Read(), false); //读不完整返回false
//var jr2 = new Utf8JsonReader(data.AsSpan(15), false, jr.CurrentState);
//jr2.Read(); //报错误，第一个符号为.
//Assert.Equal(service, "sys.HelloService.Hello");
}
public TestBytesSegment(int size, TestBytesSegment previous)
{
//Buffer = MemoryPool<byte>.Shared.Rent(size);
Buffer = new byte[size];
Previous = previous;
if (Previous != null)
{
Previous.Next = this;
}
//Memory = Buffer.Memory;
Memory = Buffer.AsMemory();
RunningIndex = previous?.RunningIndex + previous?.Memory.Length ?? 0;
}