140 lines
4.5 KiB
C#
140 lines
4.5 KiB
C#
using System;
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using Xunit;
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using XWorld.Framework.Protocol;
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namespace XWorld.Framework.Tests
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{
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public class PacketCodecTests
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{
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[Theory]
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[InlineData(0u)]
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[InlineData(1u)]
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[InlineData(127u)]
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[InlineData(128u)]
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[InlineData(16384u)]
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[InlineData(uint.MaxValue)]
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public void VarUInt_RoundTrips(uint value)
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{
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var w = new PacketWriter();
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w.WriteVarUInt(value);
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var r = new PacketReader(w.ToArray());
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Assert.Equal(value, r.ReadVarUInt());
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Assert.False(r.HasMore);
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}
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[Theory]
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[InlineData(0)]
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[InlineData(1)]
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[InlineData(-1)]
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[InlineData(int.MaxValue)]
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[InlineData(int.MinValue)]
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public void VarInt_RoundTrips(int value)
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{
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var w = new PacketWriter();
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w.WriteVarInt(value);
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var r = new PacketReader(w.ToArray());
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Assert.Equal(value, r.ReadVarInt());
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}
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[Theory]
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[InlineData(0L)]
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[InlineData(-1234567890123L)]
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[InlineData(long.MaxValue)]
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[InlineData(long.MinValue)]
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public void VarLong_RoundTrips(long value)
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{
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var w = new PacketWriter();
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w.WriteVarLong(value);
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var r = new PacketReader(w.ToArray());
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Assert.Equal(value, r.ReadVarLong());
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}
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[Fact]
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public void MixedSequence_RoundTrips_InOrder()
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{
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var w = new PacketWriter();
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w.WriteBool(true);
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w.WriteByte(200);
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w.WriteUInt16(50000);
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w.WriteVarInt(-42);
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w.WriteSingle(3.14159f);
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w.WriteString("héllo 世界");
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w.WriteBytes(new byte[] { 1, 2, 3, 0, 255 });
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var r = new PacketReader(w.ToArray());
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Assert.True(r.ReadBool());
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Assert.Equal((byte)200, r.ReadByte());
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Assert.Equal((ushort)50000, r.ReadUInt16());
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Assert.Equal(-42, r.ReadVarInt());
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Assert.Equal(3.14159f, r.ReadSingle(), 5);
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Assert.Equal("héllo 世界", r.ReadString());
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Assert.Equal(new byte[] { 1, 2, 3, 0, 255 }, r.ReadBytes());
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Assert.False(r.HasMore);
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}
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[Fact]
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public void EmptyAndNull_String_Bytes_RoundTripAsEmpty()
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{
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var w = new PacketWriter();
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w.WriteString(null);
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w.WriteString("");
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w.WriteBytes(null);
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w.WriteBytes(Array.Empty<byte>());
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var r = new PacketReader(w.ToArray());
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Assert.Equal("", r.ReadString());
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Assert.Equal("", r.ReadString());
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Assert.Empty(r.ReadBytes());
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Assert.Empty(r.ReadBytes());
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}
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[Fact]
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public void ReadPastEnd_Throws()
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{
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var r = new PacketReader(Array.Empty<byte>());
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Assert.Throws<FormatException>(() => r.ReadByte());
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}
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[Fact]
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public void ReadBytes_WithBogusLength_Throws()
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{
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// 长度前缀声称 10 字节，实际无数据
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var w = new PacketWriter();
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w.WriteVarUInt(10);
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var r = new PacketReader(w.ToArray());
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Assert.Throws<FormatException>(() => r.ReadBytes());
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}
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[Fact]
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public void ReadVarUInt_SixthByte_Throws()
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{
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// 5 个延续字节后还有第 6 字节 → 过长，必须抛异常而非静默损坏
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var r = new PacketReader(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0x8F, 0x00 });
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Assert.Throws<FormatException>(() => r.ReadVarUInt());
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}
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[Fact]
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public void ReadVarUInt_LastByteOverflow_Throws()
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{
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// 第 5 字节 0x10 表示值超过 uint.MaxValue
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var r = new PacketReader(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0x10 });
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Assert.Throws<FormatException>(() => r.ReadVarUInt());
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}
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[Fact]
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public void ReadVarLong_EleventhByte_Throws()
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{
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var r = new PacketReader(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x81, 0x00 });
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Assert.Throws<FormatException>(() => r.ReadVarLong());
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}
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[Fact]
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public void ReadVarLong_LastByteOverflow_Throws()
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{
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// 第 10 字节 0x02 表示值超过 ulong 的 64 位
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var r = new PacketReader(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x02 });
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Assert.Throws<FormatException>(() => r.ReadVarLong());
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}
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}
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}
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