Create Category controller and service

backend/LeedsBeerQuest.API/LeedsBeerQuest.API.Tests/Data/Services/CategoryServiceTests.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using LeedsBeerQuest.API.Data.Contexts;
+using LeedsBeerQuest.API.Data.Models;
+using LeedsBeerQuest.API.Data.Services;
+using LeedsBeerQuest.API.Data.Services.Interfaces;
+using Microsoft.EntityFrameworkCore;
+using NUnit.Framework;
+
+namespace LeedsBeerQuest.API.Tests.Data.Services;
+
+[TestFixture]
+public class CategoryServiceTests
+{
+    private LeedsBeerQuestDbContext _context;
+    private ICategoryService _categoryService;
+
+    [SetUp]
+    public void SetUp()
+    {
+        var builder = new DbContextOptionsBuilder<LeedsBeerQuestDbContext>()
+            .UseInMemoryDatabase($"CategoryServiceTests.{Guid.NewGuid().ToString()}");
+        _context = new LeedsBeerQuestDbContext(builder.Options);
+
+        _categoryService = new CategoryService(_context);
+    }
+
+    [Test]
+    public async Task GetCategories_ReturnsAllCategories_WhenAllCategoriesArePresentInDatabase()
+    {
+        var categoryTestData = await seedCategoryTestData();
+
+        var result = await _categoryService.GetCategories();
+
+        Assert.AreEqual(categoryTestData.Length, result.Count());
+    }
+
+    private async Task<Category[]> seedCategoryTestData()
+    {
+        var categoryTestData = TestData.CategoryTestData;
+        _context.Categories.AddRange(categoryTestData);
+        await _context.SaveChangesAsync();
+
+        return categoryTestData;
+    }
+}

backend/LeedsBeerQuest.API/LeedsBeerQuest.API.Tests/Data/Services/TestData.cs

@@ -6,7 +6,7 @@ namespace LeedsBeerQuest.API.Tests.Data.Services;
 
 public static class TestData
 {
-    public static readonly IEnumerable<Venue> VenueTestData = new[]
+    public static IEnumerable<Venue> VenueTestData => new[]
     {
         new Venue
         {
@@ -34,4 +34,34 @@ public static class TestData
             Tags = new List<Tag>()
         }
     };
+
+    public static Category[] CategoryTestData => new[]
+    {
+        new Category
+        {
+            Id = 1,
+            Name = "Category 1"
+        },
+        new Category
+        {
+            Id = 2,
+            Name = "Category 2"
+        },
+        new Category
+        {
+            Id = 3,
+            Name = "Category 3"
+        },
+        new Category
+        {
+            Id = 4,
+            Name = "Category 4"
+        },
+        new Category
+        {
+            Id = 5,
+            Name = "Category 5"
+        },
+
+    };
 }