create quiz repo and add unit tests

QuizApp.Database/Models/BaseModel.cs

@@ -1,6 +1,9 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace QuizApp.Database.Models;
 
 public class BaseModel
 {
+    [Key]
     public int Id { get; set; }
 }

QuizApp.Database/QuizApp.Database.csproj

@@ -8,7 +8,6 @@
 
     <ItemGroup>
       <Folder Include="Migrations\" />
-      <Folder Include="Repositories\" />
     </ItemGroup>
 
     <ItemGroup>

QuizApp.Database/Repositories/IQuizRepository.cs

@@ -0,0 +1,7 @@
+namespace QuizApp.Database.Repositories;
+
+public interface IQuizRepository
+{
+    Task<int> CreateQuiz(string name);
+    Task<int> CreateQuestion(int quizId, string question);
+}

QuizApp.Database/Repositories/QuizRepository.cs

@@ -0,0 +1,47 @@
+using QuizApp.Database.Models;
+
+namespace QuizApp.Database.Repositories;
+
+public class QuizRepository : IQuizRepository
+{
+    private readonly QuizContext db;
+
+    public QuizRepository(QuizContext db)
+    {
+        this.db = db;
+    }
+
+    public async Task<int> CreateQuiz(string name)
+    {
+        var model = db.Add(new Quiz
+        {
+            QuizName = name,
+        });
+
+        await db.SaveChangesAsync();
+
+        return model.Entity.Id;
+    }
+
+    public async Task<int> CreateQuestion(int quizId, string question)
+    {
+        var quizModel = db.Quizzes.SingleOrDefault(x => x.Id == quizId);
+        if (quizModel is null)
+        {
+            throw new InvalidOperationException($"Cannot found quiz id = {quizId}");
+        }
+
+        var questionModel = new Question
+        {
+            QuizId = quizModel.Id,
+            Quiz = quizModel,    
+            Title = question,
+        };
+
+        var result = db.Questions.Add(questionModel);
+
+        await db.SaveChangesAsync();
+
+        return result.Entity.Id;
+    }
+}

QuizApp.Test/BaseRepoTest.cs

@@ -0,0 +1,52 @@
+using QuizApp.Database;
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+
+namespace QuizApp.Test;
+
+public class BaseRepoTest : IDisposable
+{
+    internal SqliteConnection Connection { get; }
+    internal DbContextOptions<QuizContext> Options { get; }
+
+    public BaseRepoTest()
+    {
+        // Create and open a shared SqliteConnection
+        Connection = new SqliteConnection("DataSource=:memory:");
+        Connection.Open();
+
+        // Configure DbContextOptions to use this connection
+        Options = new DbContextOptionsBuilder<QuizContext>()
+            .UseSqlite(Connection)
+            .Options;
+
+        // Ensure the database schema is created
+        using var context = new QuizContext(Options);
+        context.Database.EnsureCreated();
+    }
+
+    public void Dispose()
+    {
+        // Clean up the connection after all tests are done
+        Connection.Close();
+    }
+
+    #region IDisposable Support
+    private bool disposedValue = false;
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (!disposedValue)
+        {
+            if (disposing)
+            {
+                Connection.Close();
+                Connection.Dispose();
+            }
+
+            disposedValue = true;
+        }
+    }
+
+    #endregion
+}

QuizApp.Test/QuizApp.Test.csproj

@@ -0,0 +1,30 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <IsPackable>false</IsPackable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="coverlet.collector" Version="6.0.2"/>
+        <PackageReference Include="FluentAssertions" Version="7.0.0-alpha.6" />
+        <PackageReference Include="FluentValidation" Version="11.11.0" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1"/>
+        <PackageReference Include="Moq" Version="4.20.72" />
+        <PackageReference Include="NUnit" Version="4.2.2" />
+        <PackageReference Include="xunit" Version="2.9.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <Using Include="NUnit.Framework"/>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\QuizApp.Database\QuizApp.Database.csproj" />
+    </ItemGroup>
+
+</Project>