Added a multiplicity test example

examples~/multiplicity/client/Model.cs

@@ -0,0 +1,164 @@
+using SpacetimeDB.Types;
+
+namespace client;
+
+class Model
+{
+    public HashSet<Dog> ExpectedServerDogs = new HashSet<Dog>();
+    public HashSet<Cat> ExpectedServerCats = new HashSet<Cat>();
+
+    public HashSet<Dog> ExpectedClientDogs = new HashSet<Dog>();
+    public HashSet<Cat> ExpectedClientCats = new HashSet<Cat>();
+
+    public void AddDog(Dog dog)
+    {
+        ExpectedServerDogs.Add(dog);
+    }
+
+    public void UpdateDog(Dog dog)
+    {
+        if (!ContainsDog(dog.Name))
+        {
+            Console.ForegroundColor = ConsoleColor.Red;
+            Console.WriteLine($"No Dog with Name:{dog.Name} found in local model. Cannot update local model.");
+            Console.ForegroundColor = ConsoleColor.White;
+            return;
+        }
+        foreach (Dog existingDog in ExpectedServerDogs)
+        {
+            if (existingDog.Name == dog.Name)
+            {
+                existingDog.Name = dog.Name;
+                existingDog.Color = dog.Color;
+                existingDog.Age = dog.Age;
+            }
+        }
+    }
+
+    public void RemoveDog(Dog dog)
+    {
+        ExpectedServerDogs.Remove(dog);
+    }
+
+    public void RemoveDog(string name)
+    {
+        foreach (Dog dog in ExpectedServerDogs)
+        {
+            if (dog.Name == name)
+            {
+                ExpectedServerDogs.Remove(dog);
+            }
+        }
+    }
+
+    public bool ContainsDog(string name)
+    {
+        bool contains = false;
+        foreach (Dog dog in ExpectedServerDogs)
+        {
+            if (dog.Name == name)
+            {
+                contains = true;
+            }
+        }
+        return contains;
+    }
+
+    public bool ContainsDog(string name, string color, uint age, HashSet<Dog> modelHashSet)
+    {
+        bool contains = false;
+        foreach (Dog dog in modelHashSet)
+        {
+            if (dog.Name == name && dog.Color == color && dog.Age == age)
+            {
+                contains = true;
+            }
+        }
+        return contains;
+    }
+
+    public void AddCat(Cat cat)
+    {
+        ExpectedServerCats.Add(cat);
+    }
+
+    public void UpdateCat(Cat cat)
+    {
+        if (!ContainsDog(cat.Name))
+        {
+            Console.ForegroundColor = ConsoleColor.Red;
+            Console.WriteLine($"No Dog with Name:{cat.Name} found in local model. Cannot update local model.");
+            Console.ForegroundColor = ConsoleColor.White;
+            return;
+        }
+        foreach (Dog existingCat in ExpectedServerDogs)
+        {
+            if (existingCat.Name == cat.Name)
+            {
+                existingCat.Name = cat.Name;
+                existingCat.Color = cat.Color;
+                existingCat.Age = cat.Age;
+            }
+        }
+    }
+
+    public void RemoveCat(Cat cat)
+    {
+        ExpectedServerCats.Remove(cat);
+    }
+
+    public void RemoveCat(string name)
+    {
+        foreach (Cat cat in ExpectedServerCats)
+        {
+            if (cat.Name == name)
+            {
+                ExpectedServerCats.Remove(cat);
+            }
+        }
+    }
+
+    public bool ContainsCat(string name)
+    {
+        bool contains = false;
+        foreach (Cat cat in ExpectedServerCats)
+        {
+            if (cat.Name == name)
+            {
+                contains = true;
+            }
+        }
+        return contains;
+    }
+
+    public bool ContainsCat(string name, string color, uint age, HashSet<Cat> modelHashSet)
+    {
+        bool contains = false;
+        foreach (Cat cat in modelHashSet)
+        {
+            if (cat.Name == name && cat.Color == color && cat.Age == age)
+            {
+                contains = true;
+            }
+        }
+        return contains;
+    }
+
+    public void OutputExpectedDogs(HashSet<Dog> modelHashSet)
+    {
+        Console.WriteLine("Client dogs:");
+        foreach (Dog dog in modelHashSet)
+        {
+            Console.WriteLine($"  Dog (Name:{dog.Name}, Color:{dog.Color}, Age:{dog.Age}).");
+        }
+    }
+
+    public void OutputExpectedCats(HashSet<Cat> modelHashSet)
+    {
+        Console.WriteLine("Client dogs:");
+        foreach (Cat cat in modelHashSet)
+        {
+            Console.WriteLine($"  Cat (Name:{cat.Name}, Color:{cat.Color}, Age:{cat.Age}).");
+        }
+    }
+}