acdream/tests/AcDream.Core.Net.Tests/Messages/InteractRequestsTests.cs
Erik ced1b85c61 test(B.5): exercise i32 sign-correctness for BuildPickUp.placement
The original test only used placement=0, which encodes identically
under WriteInt32 and WriteUInt32. Add a -1 case so a future regression
to the unsigned writer would actually fail the test.

Flagged by Task 1 code review.
2026-05-14 15:05:07 +02:00

87 lines
3.2 KiB
C#

using System;
using System.Buffers.Binary;
using AcDream.Core.Net.Messages;
using Xunit;
namespace AcDream.Core.Net.Tests.Messages;
public sealed class InteractRequestsTests
{
[Fact]
public void BuildUse_WritesOpcode0x0036AndTarget()
{
byte[] body = InteractRequests.BuildUse(gameActionSequence: 2, targetGuid: 0xDEAD);
Assert.Equal(16, body.Length);
Assert.Equal(InteractRequests.UseOpcode,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(8)));
Assert.Equal(0xDEADu,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(12)));
}
[Fact]
public void BuildUseWithTarget_WritesBothGuids()
{
byte[] body = InteractRequests.BuildUseWithTarget(
gameActionSequence: 3, sourceGuid: 0x1000, targetGuid: 0x2000);
Assert.Equal(20, body.Length);
Assert.Equal(InteractRequests.UseWithTargetOpcode,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(8)));
Assert.Equal(0x1000u,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(12)));
Assert.Equal(0x2000u,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(16)));
}
[Fact]
public void BuildTeleToLifestone_IsEnvelopeOnly()
{
byte[] body = InteractRequests.BuildTeleToLifestone(gameActionSequence: 7);
Assert.Equal(12, body.Length);
Assert.Equal(InteractRequests.TeleToLifestoneOpcode,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(8)));
}
[Fact]
public void BuildPickUp_WritesOpcode0x0019AndPayload()
{
byte[] body = InteractRequests.BuildPickUp(
gameActionSequence: 5,
itemGuid: 0xABCDu,
containerGuid: 0x5000000Au,
placement: 0);
Assert.Equal(24, body.Length);
Assert.Equal(InteractRequests.GameActionEnvelope,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(0)));
Assert.Equal(5u,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(4)));
Assert.Equal(InteractRequests.PutItemInContainerOpcode,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(8)));
Assert.Equal(0xABCDu,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(12)));
Assert.Equal(0x5000000Au,
BinaryPrimitives.ReadUInt32LittleEndian(body.AsSpan(16)));
Assert.Equal(0,
BinaryPrimitives.ReadInt32LittleEndian(body.AsSpan(20)));
}
[Fact]
public void BuildPickUp_NegativePlacement_WritesSignedLittleEndian()
{
// Sign-correctness guard: placement is i32 on the wire (ACE
// GameActionPutItemInContainer.Handle reads ReadInt32). A
// placement=0 test would pass even if the builder used
// WriteUInt32, so we also exercise a negative value where the
// unsigned/signed encodings would diverge.
byte[] body = InteractRequests.BuildPickUp(
gameActionSequence: 1,
itemGuid: 0x1u,
containerGuid: 0x2u,
placement: -1);
Assert.Equal(-1,
BinaryPrimitives.ReadInt32LittleEndian(body.AsSpan(20)));
}
}