x-lab-lbq-technical-test/backend/LeedsBeerQuest.API/LeedsBeerQuest.API.Tests/Data/Services/VenueServiceTests.cs

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 Microsoft.EntityFrameworkCore;
using NUnit.Framework;

namespace LeedsBeerQuest.API.Tests.Data.Services;

[TestFixture]
public class VenueServiceTests
{
    private LeedsBeerQuestDbContext _context;
    private VenueService _venueService;
    
    [SetUp]
    public void SetUp()
    {
        var builder = new DbContextOptionsBuilder<LeedsBeerQuestDbContext>()
            .UseInMemoryDatabase($"VenueServiceTests.{Guid.NewGuid().ToString()}");
        _context = new LeedsBeerQuestDbContext(builder.Options);

        _venueService = new VenueService(_context);
    }

    [Test]
    public async Task GetAllVenues_ReturnsAllVenues_WhenAllVenuesArePresentInDatabase()
    {
        var venueTestData = await seedVenueTestData();

        var result = await _venueService.GetAllVenues();
        var resultArray = result.ToArray();
        
        Assert.AreEqual(venueTestData.Length, resultArray.Length);
        
        Assert.AreEqual(venueTestData[0].Id, resultArray[0].Id);
        Assert.AreEqual(venueTestData[0].Name, resultArray[0].Name);
    }

    [Test]
    public async Task GetAllVenues_ReturnsNoVenues_WhenNoVenuesArePresentInDatabase()
    {
        var result = await _venueService.GetAllVenues();
        
        Assert.AreEqual(0, result.Count());
    }

    [Test]
    public async Task GetVenue_ReturnsVenue_WhenRequestedVenueExists()
    {
        var venueTestData = await seedVenueTestData();
        var expectedVenueId = venueTestData[0].Id;
        var expectedVenueName = venueTestData[0].Name;

        var result = await _venueService.GetVenue(expectedVenueId);;

        Assert.NotNull(result);
        Assert.AreEqual(expectedVenueId, result.Id);
        Assert.AreEqual(expectedVenueName, result.Name);
    }

    [Test]
    public async Task GetVenue_ReturnsNull_WhenRequestedVenueDoesNotExist()
    {
        var result = await _venueService.GetVenue(1);

        Assert.Null(result);
    }

    private async Task<Venue[]> seedVenueTestData()
    {
        var venueTestData = TestData.VenueTestData;
        _context.Venues.AddRange(venueTestData);
        await _context.SaveChangesAsync();

        return venueTestData;
    }
}