List-to-List MergeManyChangeSets (#780)

Implements the MergeManyChangeSets operator for when both the Source and the Child changesets are List ChangeSets.

src/DynamicData.Tests/Domain/Animal.cs

@@ -15,26 +15,23 @@ public enum AnimalFamily
     Bird
 }
 
-public class Animal : AbstractNotifyPropertyChanged
+public class Animal(string name, string type, AnimalFamily family, bool include = true) : AbstractNotifyPropertyChanged
 {
-    private bool _includeInResults;
+    private bool _includeInResults = include;
 
-    public Animal(string name, string type, AnimalFamily family)
-    {
-        Name = name;
-        Type = type;
-        Family = family;
-    }
-
-    public AnimalFamily Family { get; }
+    public AnimalFamily Family { get; } = family;
 
     public bool IncludeInResults
     {
         get => _includeInResults;
         set => SetAndRaise(ref _includeInResults, value);
     }
 
-    public string Name { get; }
+    public string Name { get; } = name;
+
+    public string Type { get; } = type;
+
+    public string FormalName => $"{Name} the {Type}";
 
-    public string Type { get; }
+    public override string ToString() => $"{FormalName} ({Family})";
 }

src/DynamicData.Tests/Domain/AnimalOwner.cs

@@ -0,0 +1,15 @@
+
+using System;
+
+namespace DynamicData.Tests.Domain;
+
+internal class AnimalOwner(string name) : IDisposable
+{
+    public Guid Id { get; } = Guid.NewGuid();
+
+    public string Name => name;
+
+    public ISourceList<Animal> Animals { get; } = new SourceList<Animal>();
+
+    public void Dispose() => Animals.Dispose();
+}

src/DynamicData.Tests/Domain/Fakers.cs

@@ -0,0 +1,53 @@
+using Bogus;
+
+namespace DynamicData.Tests.Domain;
+
+internal static class Fakers
+{
+    const int MinAnimals = 3;
+#if DEBUG
+    const int MaxAnimals = 7;
+#else
+    const int MaxAnimals = 23;
+#endif
+
+    private static readonly string[][] AnimalTypeNames =
+    [
+        // Mammal
+        ["Dog", "Cat", "Ferret", "Hamster", "Gerbil", "Cavie", "Mouse", "Pot-Bellied Pig"],
+
+        // Reptile
+        ["Corn Snake", "Python", "Gecko", "Skink", "Monitor Lizard", "Chameleon", "Tortoise", "Box Turtle", "Iguana"],
+
+        // Fish
+        ["Betta", "Goldfish", "Angelfish", "Catfish", "Guppie", "Mollie", "Neon Tetra", "Platie", "Koi"],
+
+        // Amphibian
+        ["Frog", "Toad", "Salamander"],
+
+        // Bird
+        ["Parakeet", "Cockatoo", "Parrot", "Finch", "Conure", "Lovebird", "Cockatiel"],
+    ];
+
+    public static Faker<Animal> Animal { get; } =
+        new Faker<Animal>()
+            .CustomInstantiator(faker =>
+            {
+                var family = faker.PickRandom<AnimalFamily>();
+                var type = faker.PickRandom(AnimalTypeNames[(int)family]);
+                var name = faker.Commerce.ProductAdjective();
+
+                return new Animal(name, type, family);
+            });
+
+    public static Faker<AnimalOwner> AnimalOwner { get; } =
+        new Faker<AnimalOwner>()
+            .CustomInstantiator(faker =>
+            {
+                var result = new AnimalOwner(faker.Person.FullName);
+
+                result.Animals.AddRange(Animal.Generate(faker.Random.Number(MinAnimals, MaxAnimals)));
+
+                return result;
+            });
+}

src/DynamicData.Tests/DynamicData.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="MSBuild.Sdk.Extras">
+<Project Sdk="MSBuild.Sdk.Extras">
   <PropertyGroup>
     <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
     <NoWarn>$(NoWarn);CS0618;CA1801;CA1063;CS8767;CS8602;CS8618;IDE1006</NoWarn>
@@ -12,6 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Bogus" Version="34.0.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <PackageReference Include="xunit.runner.console" Version="$(XunitVersion)" />

src/DynamicData.Tests/List/MergeManyCacheChangeSetsFixture.cs → src/DynamicData.Tests/List/MergeManyChangeSetsCacheFixture.cs

@@ -11,7 +11,7 @@
 
 namespace DynamicData.Tests.List;
 
-public sealed class MergeManyCacheChangeSetsFixture : IDisposable
+public sealed class MergeManyChangeSetsCacheFixture : IDisposable
 {
 #if DEBUG
     const int MarketCount = 3;
@@ -36,7 +36,7 @@ public sealed class MergeManyCacheChangeSetsFixture : IDisposable
 
     private readonly ChangeSetAggregator<IMarket> _marketListResults;
 
-    public MergeManyCacheChangeSetsFixture()
+    public MergeManyChangeSetsCacheFixture()
     {
         _marketListResults = _marketList.Connect().AsAggregator();
     }
@@ -749,17 +749,3 @@ private void DisposeMarkets()
         _marketList.Clear();
     }
 }
-
-internal static class Extensions
-{
-    public static T With<T>(this T item, Action<T> action)
-    {
-        action(item);
-        return item;
-    }
-
-    public static IObservable<T> ForceFail<T>(this IObservable<T> source, int count, Exception? e) =>
-        (e is not null)
-            ? source.Take(count).Concat(Observable.Throw<T>(e))
-            : source;
-}