acdream/tests/AcDream.Plugins.MossTank.Tests/VtankMetaProfileSerializerTests.cs

using System.Globalization;

namespace AcDream.Plugins.MossTank.Tests;

/// <summary>
/// Item H (Campaign VT slice-1 fix round): restores two reader-only tests a
/// prior commit (0d10399e0, "A2 VTank profile directory resolution") deleted
/// as collateral damage of an unrelated file move — <c>LoadsKnownTypedCondActRecord</c>
/// and the signed-high-bit round trip embedded in the deleted
/// <c>RoundTripPreservesEveryVtankConditionActionAndEmbeddedNav</c>. Both are
/// adapted to the reader-only contract <c>VtankMetaProfileSerializer</c> has
/// had since it was demoted to a one-shot <c>.met</c> import (commit
/// 3ff9461ef, "MossTank does not implement .met"): neither calls the deleted
/// <c>Save</c> writer.
/// </summary>
public sealed class VtankMetaProfileSerializerTests
{
    [Fact]
    public void LoadsKnownTypedCondActRecord()
    {
        const string source = "1\r\nCondAct\r\n5\r\nCType\r\nAType\r\n"
            + "CData\r\nAData\r\nState\r\nn\r\nn\r\nn\r\nn\r\nn\r\n1\r\n"
            + "i\r\n1\r\ni\r\n2\r\ni\r\n0\r\ns\r\n/say ready\r\n"
            + "s\r\nDefault\r\n";

        Assert.True(VtankMetaProfileSerializer.TryLoad(
            source, out MetaProfile profile, out string error), error);

        MetaRule rule = Assert.Single(profile.Rules);
        Assert.Equal(MetaConditionKind.Always, rule.Condition.Kind);
        Assert.Equal(MetaActionKind.ChatCommand, rule.Action.Kind);
        Assert.Equal("/say ready", rule.Action.Text);
        Assert.Equal("Default", rule.State);
    }

    /// <summary>
    /// Condition type 17 (LandblockEquals) reads a raw signed decimal int
    /// line (<c>ReadCondition</c> case 17: <c>reader.Expect("i");
    /// value.Number = reader.ReadInt();</c>) into a <see cref="double"/>
    /// field. A real landblock id with the high bit set — 0x8B370000, a
    /// legitimate 32-bit landblock/object id — becomes negative once cast to
    /// a signed <see cref="int"/> (VTank's own on-disk encoding, exactly
    /// what the deleted round-trip test exercised via
    /// <c>unchecked((int)0x8B370000u)</c>); this pins that the reader
    /// recovers the exact same bit pattern rather than silently clamping or
    /// mis-widening it (a double exactly represents every 32-bit int, so
    /// this is a real assertion, not a tautology once the string form is
    /// the true value under test).
    /// </summary>
    [Fact]
    public void SignedHighBitLandblockIdRoundTripsExactly()
    {
        int highBitValue = unchecked((int)0x8B370000u);
        Assert.True(highBitValue < 0, "0x8B370000 must decode as negative once cast to Int32.");
        string source = "1\r\nCondAct\r\n5\r\nCType\r\nAType\r\n"
            + "CData\r\nAData\r\nState\r\nn\r\nn\r\nn\r\nn\r\nn\r\n1\r\n"
            + "i\r\n17\r\ni\r\n0\r\n"
            + "i\r\n" + highBitValue.ToString(CultureInfo.InvariantCulture) + "\r\n"
            + "i\r\n0\r\n"
            + "s\r\nDefault\r\n";

        Assert.True(VtankMetaProfileSerializer.TryLoad(
            source, out MetaProfile profile, out string error), error);

        MetaRule rule = Assert.Single(profile.Rules);
        Assert.Equal(MetaConditionKind.LandblockEquals, rule.Condition.Kind);
        Assert.Equal((double)highBitValue, rule.Condition.Number);
    }
}