Begin process of adding unit tests with NUnit

critterfolio/CritterFolio/CritterFolio.sln

@@ -18,6 +18,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		Directory.Packages.props = Directory.Packages.props
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CritterFolioTests", "CritterFolioTests\CritterFolioTests.csproj", "{8FC9599B-8CE1-4AA2-B428-17F923598643}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -44,6 +46,10 @@ Global
 		{7AD1DAC8-7FBE-49D5-8614-7321233DB82E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7AD1DAC8-7FBE-49D5-8614-7321233DB82E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{7AD1DAC8-7FBE-49D5-8614-7321233DB82E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8FC9599B-8CE1-4AA2-B428-17F923598643}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8FC9599B-8CE1-4AA2-B428-17F923598643}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8FC9599B-8CE1-4AA2-B428-17F923598643}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8FC9599B-8CE1-4AA2-B428-17F923598643}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

critterfolio/CritterFolio/CritterFolio/CritterFolio.csproj

@@ -29,4 +29,10 @@
   <ItemGroup>
     <Folder Include="Assets\Fonts\" />
   </ItemGroup>
+
+  <ItemGroup>
+    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+      <_Parameter1>CritterFolioTests</_Parameter1> 
+    </AssemblyAttribute>
+  </ItemGroup>
 </Project>

critterfolio/CritterFolio/CritterFolio/Pages/HomePage.axaml.cs

@@ -111,7 +111,7 @@ public partial class HomePage : Page
         Sys.Navigation?.PushPage(critterPage);
     }
 
-    private async void AddButtonClicked(object? sender, RoutedEventArgs e)
+    internal async void AddButtonClicked(object? sender, RoutedEventArgs e)
     {
         var newCritter = new Critter();
         try

critterfolio/CritterFolio/CritterFolio/Pages/TestPage.axaml.cs

@@ -48,8 +48,8 @@ public partial class TestPage : Page
             };
             await DatabaseService.AddCritter(polities);
 
-            var torielId = (await DatabaseService.GetCritter("Toriel")).Id;
+            var torielId = (await DatabaseService.GetCritter("Toriel"))!.Id;
-            var poliId = (await DatabaseService.GetCritter("Polities")).Id;
+            var poliId = (await DatabaseService.GetCritter("Polities"))!.Id;
             
             var jessie = new Critter
             {

critterfolio/CritterFolio/CritterFolioTests/CritterFolioTests.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+
+        <IsPackable>false</IsPackable>
+        <IsTestProject>true</IsTestProject>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="coverlet.collector" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" />
+        <PackageReference Include="NUnit" />
+        <PackageReference Include="NUnit.Analyzers" />
+        <PackageReference Include="NUnit3TestAdapter" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <Using Include="NUnit.Framework" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\CritterFolio\CritterFolio.csproj" />
+    </ItemGroup>
+
+</Project>

critterfolio/CritterFolio/CritterFolioTests/UnitTest1.cs

@@ -0,0 +1,34 @@
+using Avalonia.Interactivity;
+using CritterFolio;
+using CritterFolio.DataModels;
+using CritterFolio.Pages;
+using CritterFolio.Services;
+
+namespace CritterFolioTests;
+
+public class Tests
+{
+    [SetUp]
+    public void Setup()
+    {
+    }
+
+    [Test]
+    public async Task TestAddingCritter()
+    {
+        var homePage = new HomePage();
+        var currentCritterDbCount = (await DatabaseService.GetAllCritters()).Count;
+        
+        homePage.AddButtonClicked(null, new RoutedEventArgs());
+        
+        var newCritterDbCount = (await DatabaseService.GetAllCritters()).Count;
+        
+        Assert.That(newCritterDbCount == currentCritterDbCount + 1, Is.True);
+    }
+
+    [Test]
+    public async Task TestGettingCritter()
+    {
+        Assert.That(await DatabaseService.GetCritter(-1), Is.True);
+    }
+}

critterfolio/CritterFolio/Directory.Packages.props

@@ -20,5 +20,10 @@
     <PackageVersion Include="sqlite-net-pcl" Version="1.9.172" />
     <PackageVersion Include="SQLitePCLRaw.bundle_green" Version="2.1.11" />
     <PackageVersion Include="Xamarin.AndroidX.Core.SplashScreen" Version="1.0.1.15" />
+    <PackageVersion Include="coverlet.collector" Version="6.0.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageVersion Include="NUnit" Version="3.14.0" />
+    <PackageVersion Include="NUnit.Analyzers" Version="3.9.0" />
+    <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 </Project>