Testnetz: geldkritische Trade-Mathematik extrahiert (TradeMath) + getestet

- Neue pure Klasse TradeMath (Logic/): ExitValue, RealizedPnl, PnlPercent (Null-Guard), WeightedAverageEntryPrice (Div-durch-0-Schutz). - CopyTradingEngine ruft sie jetzt im Demo-Close-PnL und bei der Positions- Aufstockung (Demo + Live, gewichteter Einstiegspreis) – verhaltensneutral. - TradeMathTests (6 Faelle: Gewinn/Verlust, %-Basis, 0-Kapital/0-Size-Guards). Gesamt 160 Tests gruen. Build/Smoke gruen. (Phase-0.1-SELL-Wiring weiterhin bewusst zurueckgestellt bis zum Server-Test; pure Leiter liegt getestet bereit.) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-07 11:09:41 +02:00
parent 581755029a
commit 1dffc9e253
3 changed files with 85 additions and 5 deletions
@@ -0,0 +1,51 @@
+using PolyTrader.Modules.CopyTrading.Logic;
+using Xunit;
+using static PolyTrader.Modules.CopyTrading.Logic.TradeMath;
+
+namespace PolyTrader.Tests
+{
+    /// <summary>
+    /// Sicherheitsnetz für die geldkritische Trade-Mathematik (PnL, PnL-%, gewichteter Entry).
+    /// </summary>
+    public class TradeMathTests
+    {
+        [Fact]
+        public void ExitValue_is_shares_times_price()
+        {
+            Assert.Equal(99m, ExitValue(100m, 0.99m));
+        }
+
+        [Fact]
+        public void RealizedPnl_profit_and_loss()
+        {
+            Assert.Equal(49m, RealizedPnl(sizeShares: 100m, exitPrice: 0.99m, entryAmountUsd: 50m));
+            Assert.Equal(-20m, RealizedPnl(sizeShares: 100m, exitPrice: 0.40m, entryAmountUsd: 60m));
+        }
+
+        [Fact]
+        public void PnlPercent_relative_to_entry_capital()
+        {
+            Assert.Equal(98m, PnlPercent(realizedPnl: 49m, entryAmountUsd: 50m));
+            Assert.Equal(-20m, PnlPercent(realizedPnl: -20m, entryAmountUsd: 100m));
+        }
+
+        [Fact]
+        public void PnlPercent_zero_entry_returns_zero_not_divide_by_zero()
+        {
+            Assert.Equal(0m, PnlPercent(49m, 0m));
+        }
+
+        [Fact]
+        public void WeightedAverageEntryPrice_is_amount_over_size()
+        {
+            Assert.Equal(0.5m, WeightedAverageEntryPrice(totalAmountUsd: 100m, totalSize: 200m));
+            Assert.Equal(0.51m, WeightedAverageEntryPrice(51m, 100m));
+        }
+
+        [Fact]
+        public void WeightedAverageEntryPrice_zero_size_returns_zero()
+        {
+            Assert.Equal(0m, WeightedAverageEntryPrice(100m, 0m));
+        }
+    }
+}