Update data access layer, begin acquiring raw data

DALTests/DALTests.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DataAccessLayer\DataAccessLayer.csproj" />
+  </ItemGroup>
+</Project>

DALTests/UserAccountRepositoryTests.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using DataAccessLayer;
+using DataAccessLayer.Entities;
+using Xunit;
+
+namespace DALTests
+{
+    public class UserAccountRepositoryTests
+    {
+        private readonly UserAccountRepository _repository;
+
+        public UserAccountRepositoryTests()
+        {
+            _repository = new UserAccountRepository();
+        }
+
+        [Fact]
+        public void Add_ShouldInsertUserAccount()
+        {
+            
+            // Arrange
+            var userAccount = new UserAccount
+            {
+                UserAccountID = Guid.NewGuid(),
+                Username = "testuser",
+                FirstName = "Test",
+                LastName = "User",
+                Email = "testuser@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1990, 1, 1),
+            };
+
+            // Act
+            _repository.Add(userAccount);
+            var retrievedUser = _repository.GetById(userAccount.UserAccountID);
+
+            // Assert
+            Assert.NotNull(retrievedUser);
+            Assert.Equal(userAccount.Username, retrievedUser.Username);
+        }
+
+        [Fact]
+        public void GetById_ShouldReturnUserAccount()
+        {
+            // Arrange
+            var userId = Guid.NewGuid();
+            var userAccount = new UserAccount
+            {
+                UserAccountID = userId,
+                Username = "existinguser",
+                FirstName = "Existing",
+                LastName = "User",
+                Email = "existinguser@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1985, 5, 15),
+            };
+            _repository.Add(userAccount);
+
+            // Act
+            var retrievedUser = _repository.GetById(userId);
+
+            // Assert
+            Assert.NotNull(retrievedUser);
+            Assert.Equal(userId, retrievedUser.UserAccountID);
+        }
+
+        [Fact]
+        public void Update_ShouldModifyUserAccount()
+        {
+            // Arrange
+            var userAccount = new UserAccount
+            {
+                UserAccountID = Guid.NewGuid(),
+                Username = "updatableuser",
+                FirstName = "Updatable",
+                LastName = "User",
+                Email = "updatableuser@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1992, 3, 10),
+            };
+            _repository.Add(userAccount);
+
+            // Act
+            userAccount.FirstName = "Updated";
+            _repository.Update(userAccount);
+            var updatedUser = _repository.GetById(userAccount.UserAccountID);
+
+            // Assert
+            Assert.NotNull(updatedUser);
+            Assert.Equal("Updated", updatedUser.FirstName);
+        }
+
+        [Fact]
+        public void Delete_ShouldRemoveUserAccount()
+        {
+            // Arrange
+            var userAccount = new UserAccount
+            {
+                UserAccountID = Guid.NewGuid(),
+                Username = "deletableuser",
+                FirstName = "Deletable",
+                LastName = "User",
+                Email = "deletableuser@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1995, 7, 20),
+            };
+            _repository.Add(userAccount);
+
+            // Act
+            _repository.Delete(userAccount.UserAccountID);
+            var deletedUser = _repository.GetById(userAccount.UserAccountID);
+
+            // Assert
+            Assert.Null(deletedUser);
+        }
+
+        [Fact]
+        public void GetAll_ShouldReturnAllUserAccounts()
+        {
+            // Arrange
+            var user1 = new UserAccount
+            {
+                UserAccountID = Guid.NewGuid(),
+                Username = "user1",
+                FirstName = "User",
+                LastName = "One",
+                Email = "user1@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1990, 1, 1),
+            };
+            var user2 = new UserAccount
+            {
+                UserAccountID = Guid.NewGuid(),
+                Username = "user2",
+                FirstName = "User",
+                LastName = "Two",
+                Email = "user2@example.com",
+                CreatedAt = DateTime.UtcNow,
+                DateOfBirth = new DateTime(1992, 2, 2),
+            };
+            _repository.Add(user1);
+            _repository.Add(user2);
+
+            // Act
+            var allUsers = _repository.GetAll();
+
+            // Assert
+            Assert.NotNull(allUsers);
+            Assert.True(allUsers.Count() >= 2);
+        }
+    }
+}