test(dotnet): add 32 xUnit tests for domain calculators (WBS-10.2)

src/dotnet/QuantEngine.Core.Tests/ProfitLockCalculatorTests.cs

@@ -0,0 +1,41 @@
+using Xunit;
+using QuantEngine.Core.Domain;
+
+namespace QuantEngine.Core.Tests
+{
+    public class ProfitLockCalculatorTests
+    {
+        [Theory]
+        [InlineData(-5.0, "NORMAL")]
+        [InlineData(5.0, "BREAKEVEN_RATCHET")]
+        [InlineData(15.0, "PROFIT_LOCK_10")]
+        [InlineData(25.0, "PROFIT_LOCK_20")]
+        [InlineData(35.0, "PROFIT_LOCK_30")]
+        [InlineData(45.0, "APEX_TRAILING")]
+        [InlineData(65.0, "APEX_SUPER")]
+        public void ClassifyProfitLockStage_ProfitPcts_ReturnExpectedStage(double profitPct, string expectedStage)
+        {
+            string res = ProfitLockCalculator.ClassifyProfitLockStage(profitPct);
+            Assert.Equal(expectedStage, res);
+        }
+
+        [Fact]
+        public void ComputeTrailingStop_ApexSuper_AppliesCorrectMultiplierAndTpAction()
+        {
+            var res = ProfitLockCalculator.ComputeTrailingStop(
+                profitPct: 65.0,
+                highestClose: 100000,
+                atr20: 3000,
+                ratchetStop: 90000,
+                averageCost: 80000
+            );
+
+            Assert.Equal("APEX_SUPER", res.RatchetStage);
+            Assert.Equal("강제 10% 익절 권고", res.TpLadderAction);
+            Assert.True(res.ApexSuperActive);
+            // 100000 - 1.2 * 3000 = 100000 - 3600 = 96400
+            // NormalizeTick(96400) = 96400 (tick = 100)
+            Assert.Equal(96400, res.AutoTrailingStop);
+        }
+    }
+}