Fix realized pnl on backtest save + add tests (not all passing)

src/Managing.Domain.Tests/Managing.Domain.SimpleTests/Managing.Domain.SimpleTests.csproj

@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="FluentAssertions" Version="8.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageReference Include="xunit" Version="2.5.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Managing.Common\Managing.Common.csproj" />
+    <ProjectReference Include="..\..\Managing.Core\Managing.Core.csproj" />
+    <ProjectReference Include="..\..\Managing.Domain\Managing.Domain.csproj" />
+  </ItemGroup>
+
+</Project>

src/Managing.Domain.Tests/Managing.Domain.SimpleTests/UnitTest1.cs

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+using FluentAssertions;
+using Managing.Common;
+using Managing.Domain.Shared.Helpers;
+using static Managing.Common.Enums;
+using Xunit;
+
+namespace Managing.Domain.SimpleTests;
+
+/// <summary>
+/// Simple tests for TradingBox methods that don't require complex domain objects.
+/// Demonstrates the testing framework is properly configured.
+/// </summary>
+public class SimpleTradingBoxTests
+{
+    [Fact]
+    public void GetHodlPercentage_WithPriceIncrease_CalculatesCorrectPercentage()
+    {
+        // Arrange
+        var candle1 = new Managing.Domain.Candles.Candle
+        {
+            Close = 100m,
+            Date = DateTime.UtcNow
+        };
+        var candle2 = new Managing.Domain.Candles.Candle
+        {
+            Close = 110m,
+            Date = DateTime.UtcNow.AddHours(1)
+        };
+
+        // Act
+        var result = TradingBox.GetHodlPercentage(candle1, candle2);
+
+        // Assert
+        result.Should().Be(10m);
+    }
+
+    [Fact]
+    public void GetHodlPercentage_WithPriceDecrease_CalculatesNegativePercentage()
+    {
+        // Arrange
+        var candle1 = new Managing.Domain.Candles.Candle
+        {
+            Close = 100m,
+            Date = DateTime.UtcNow
+        };
+        var candle2 = new Managing.Domain.Candles.Candle
+        {
+            Close = 90m,
+            Date = DateTime.UtcNow.AddHours(1)
+        };
+
+        // Act
+        var result = TradingBox.GetHodlPercentage(candle1, candle2);
+
+        // Assert
+        result.Should().Be(-10m);
+    }
+
+    [Fact]
+    public void GetGrowthFromInitalBalance_CalculatesCorrectGrowth()
+    {
+        // Arrange
+        var initialBalance = 1000m;
+        var finalPnl = 250m;
+
+        // Act
+        var result = TradingBox.GetGrowthFromInitalBalance(initialBalance, finalPnl);
+
+        // Assert
+        result.Should().Be(25m);
+    }
+
+    [Fact]
+    public void GetFeeAmount_CalculatesPercentageBasedFee()
+    {
+        // Arrange
+        var fee = 0.001m; // 0.1%
+        var amount = 10000m;
+
+        // Act
+        var result = TradingBox.GetFeeAmount(fee, amount);
+
+        // Assert
+        result.Should().Be(10m);
+    }
+
+    [Fact]
+    public void GetFeeAmount_WithEvmExchange_ReturnsFixedFee()
+    {
+        // Arrange
+        var fee = 0.001m;
+        var amount = 10000m;
+
+        // Act
+        var result = TradingBox.GetFeeAmount(fee, amount, Enums.TradingExchanges.Evm);
+
+        // Assert
+        result.Should().Be(fee);
+    }
+}