2026-09-17 18:54:53 +01:00
commit eac5fbdbf5
38 changed files with 3974 additions and 0 deletions
@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.4" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Domain\Domain.csproj" />
+    <ProjectReference Include="..\TestData\TestData.csproj" />
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,46 @@
+namespace Domain.Tests;
+
+/// <summary>Unit tests for the <see cref="OrderMoney"/> value object.</summary>
+public class OrderMoneyTests
+{
+    [Fact]
+    public void From_keeps_the_cents()
+    {
+        Assert.Equal(150_00, OrderMoney.From(150_00).Cents);
+    }
+
+    [Fact]
+    public void Zero_is_valid()
+    {
+        Assert.Equal(0, OrderMoney.From(0).Cents);
+    }
+
+    [Fact]
+    public void Negative_cents_are_rejected()
+    {
+        Assert.Throws<ArgumentOutOfRangeException>(() => OrderMoney.From(-1));
+        Assert.Throws<ArgumentOutOfRangeException>(() => _ = (OrderMoney)(-1));   // conversion validates too
+    }
+
+    [Fact]
+    public void Money_compares_by_value_not_reference()
+    {
+        Assert.Equal(OrderMoney.From(150_00), OrderMoney.From(150_00));
+        Assert.NotEqual(OrderMoney.From(150_00), OrderMoney.From(151_00));
+    }
+
+    [Fact]
+    public void Converting_back_to_cents_is_explicit()
+    {
+        var money = OrderMoney.From(150_00);
+
+        Assert.Equal(150_00, (int)money);
+        Assert.Equal(150_00, money.Cents);
+    }
+
+    [Fact]
+    public void ToString_shows_the_cents()
+    {
+        Assert.Equal("15000", OrderMoney.From(150_00).ToString());
+    }
+}