Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-30 20:40:51 -07:00
commit b451f83174
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+using Theriapolis.Core.Rules.Stats;
+using Xunit;
+
+namespace Theriapolis.Tests.Rules;
+
+public sealed class XpTableTests
+{
+    [Theory]
+    [InlineData(0,         1)]
+    [InlineData(1,         1)]
+    [InlineData(299,       1)]
+    [InlineData(300,       2)]
+    [InlineData(899,       2)]
+    [InlineData(900,       3)]
+    [InlineData(2_700,     4)]
+    [InlineData(355_000,  20)]
+    [InlineData(1_000_000,20)]
+    public void LevelForXp_MatchesD20Table(int xp, int expectedLevel)
+    {
+        Assert.Equal(expectedLevel, XpTable.LevelForXp(xp));
+    }
+
+    [Fact]
+    public void LevelForXp_NegativeThrows()
+    {
+        Assert.Throws<ArgumentOutOfRangeException>(() => XpTable.LevelForXp(-1));
+    }
+
+    [Theory]
+    [InlineData(1,    300)]
+    [InlineData(2,    900)]
+    [InlineData(19,   355_000)]
+    public void XpRequiredForNextLevel_MatchesTable(int currentLevel, int expectedNext)
+    {
+        Assert.Equal(expectedNext, XpTable.XpRequiredForNextLevel(currentLevel));
+    }
+
+    [Fact]
+    public void XpRequiredForNextLevel_AtCap_ReturnsMaxValue()
+    {
+        Assert.Equal(int.MaxValue, XpTable.XpRequiredForNextLevel(20));
+    }
+
+    [Fact]
+    public void Threshold_IsMonotonicallyIncreasing()
+    {
+        for (int lv = 2; lv <= 20; lv++)
+            Assert.True(XpTable.Threshold[lv] > XpTable.Threshold[lv - 1],
+                $"Threshold[{lv}]={XpTable.Threshold[lv]} should be > Threshold[{lv-1}]={XpTable.Threshold[lv-1]}");
+    }
+}