Fix CheckInverseList without property comparer to call invalid overlo…

…ad (#688)

Closes #212
+semver:fix

src/FluentNHibernate.Testing/DomainModel/UnidirectionalOneToManyTester.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using FluentNHibernate.Mapping;
+using FluentNHibernate.Testing.Cfg;
+using NUnit.Framework;
+
+namespace FluentNHibernate.Testing.DomainModel;
+
+public class UnidirectionalOneToManyTester
+{
+    [SetUp]
+    public void SetUp()
+    {
+        var properties = SQLiteFrameworkConfigurationFactory
+            .CreateStandardConfiguration()
+            .UseOuterJoin()
+            .ShowSql()
+            .InMemory()
+            .ToProperties();
+
+        var model = new PersistenceModel();
+        model.Add(typeof(OrderMap));
+        model.Add(typeof(LineItemMap));
+        _source = new SingleConnectionSessionSourceForSQLiteInMemoryTesting(properties, model);
+        _source.BuildSchema();
+    }
+
+    ISessionSource _source;
+
+    [Test]
+    public void ShouldHandleUnidirectionalCollections()
+    {
+        var order = new Order() { LineItems = new List<LineItem>() };
+        order.LineItems.Add(new LineItem());
+        new PersistenceSpecification<Order>(_source)
+            /* NHibernate.PropertyValueException: not-null property references
+             * a null or transient value LineItem._Order.LineItemsBackref */
+            .CheckInverseList(o => o.LineItems, order.LineItems, i => i.Id)
+            .VerifyTheMappings();
+    }
+}
+
+public class Order
+{
+    public virtual Guid Id { get; set; }
+    public virtual ICollection<LineItem> LineItems { get; set; }
+}
+
+public class LineItem
+{
+    public virtual Guid Id { get; set; }
+}
+
+public class OrderMap : ClassMap<Order>
+{
+    public OrderMap()
+    {
+        Id(x => x.Id).GeneratedBy.GuidComb();
+        HasMany(x => x.LineItems)
+            .Not.Inverse()
+            .Not.KeyNullable()
+            .Not.KeyUpdate()
+            .Cascade.AllDeleteOrphan();
+    }
+}
+
+public class LineItemMap : ClassMap<LineItem>
+{
+    public LineItemMap()
+    {
+        Id(x => x.Id).GeneratedBy.GuidComb();
+    }
+}
+

src/FluentNHibernate/Testing/PersistenceSpecificationExtensions.cs

@@ -166,7 +166,7 @@ public static PersistenceSpecification<T> CheckInverseList<T, TListElement>(this
         // Because of the params keyword, the compiler can select this overload
         // instead of the one above, even when no funcs are supplied in the method call.
         if (propertiesToCompare is null || propertiesToCompare.Length == 0)
-            return spec.CheckList(expression, propertyValue, (IEqualityComparer)null);
+            return spec.CheckInverseList(expression, propertyValue, (IEqualityComparer)null);
 
         return spec.CheckInverseList(expression, propertyValue, new FuncEqualityComparer<TListElement>(propertiesToCompare));
     }