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

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

@@ -0,0 +1,33 @@
+using Xunit;
+using QuantEngine.Core.Domain;
+
+namespace QuantEngine.Core.Tests
+{
+    public class KrxTickNormalizerTests
+    {
+        [Theory]
+        [InlineData(1500, 1)]      // < 2000
+        [InlineData(4500, 5)]      // < 5000
+        [InlineData(15000, 10)]    // < 20000
+        [InlineData(45000, 50)]    // < 50000
+        [InlineData(150000, 100)]  // < 200000
+        [InlineData(450000, 500)]  // < 500000
+        [InlineData(1000000, 1000)]// >= 500000
+        public void GetTickUnit_PriceRanges_ReturnExpectedTick(double price, int expectedTick)
+        {
+            int tick = KrxTickNormalizer.GetTickUnit(price);
+            Assert.Equal(expectedTick, tick);
+        }
+
+        [Theory]
+        [InlineData(1500.3, 1500)] // remainder = 0.3 < 0.5 -> round down
+        [InlineData(1500.7, 1501)] // remainder = 0.7 >= 0.5 -> round up
+        [InlineData(4502, 4500)]   // tick = 5, remainder = 2 < 2.5 -> round down
+        [InlineData(4503, 4505)]   // tick = 5, remainder = 3 >= 2.5 -> round up
+        public void NormalizeTick_VariousPrices_ReturnNormalizedPrice(double price, double expectedNormalized)
+        {
+            double res = KrxTickNormalizer.NormalizeTick(price);
+            Assert.Equal(expectedNormalized, res);
+        }
+    }
+}