tests/TestData/OrderBuilder.cs

@@ -0,0 +1,33 @@
+using Domain;
+
+namespace TestData;
+
+/// <summary>Test data builder for an <see cref="Order"/> (TestDataBuilder pattern); the only place tests touch an order's construction, so tests survive domain evolution.</summary>
+public sealed class OrderBuilder
+{
+    private readonly Order _order = new();
+
+    /// <summary>A valid, fresh order — the neutral starting point for tests.</summary>
+    public static OrderBuilder ValidOrder() => new();
+
+    public OrderBuilder WithId(Guid id)
+    {
+        _order.Id = id;
+        return this;
+    }
+
+    public OrderBuilder WithDescription(string description)
+    {
+        _order.Description = description;
+        return this;
+    }
+
+    /// <summary>Sets the total in cents (<c>150_00</c> = €150.00), wrapped in <see cref="OrderMoney"/>.</summary>
+    public OrderBuilder WithTotal(int totalInCents)
+    {
+        _order.TotalInCents = OrderMoney.From(totalInCents);
+        return this;
+    }
+
+    public Order Build() => _order;
+}