test: add ArchUnit test to assert the existance of empty default cons…

…tructors

Backbone.Tests.ArchUnit/DomainDrivenDesign.cs

@@ -0,0 +1,28 @@
+using ArchUnitNET.Domain.Extensions;
+using ArchUnitNET.Fluent.Conditions;
+using ArchUnitNET.xUnit;
+using Backbone.BuildingBlocks.Domain;
+using static ArchUnitNET.Fluent.ArchRuleDefinition;
+
+namespace Backbone.Backbone.Tests.ArchUnit;
+
+public class DomainDrivenDesign
+{
+    [Fact]
+    public void EntitiesShouldHaveEmptyDefaultConstructors()
+    {
+        Types()
+            .That().AreAssignableTo(typeof(Entity))
+            .Should().FollowCustomCondition((type) =>
+            {
+                var constructors = type.GetConstructors();
+
+                if (constructors.All(c => c.Parameters.Count() != 0))
+                    return new ConditionResult(type, false, "Entity should have a parameterless constructor");
+
+                return new ConditionResult(type, true);
+            }, "")
+            .Because("otherwise the real constructor would be called by EF Core, which would add a domain event to the collection")
+            .Check(Backbone.ARCHITECTURE);
+    }
+}