Kyoo/Kyoo.Tests/Library/TestContext.cs

using Kyoo.Models;
using Microsoft.Data.Sqlite;
using Microsoft.EntityFrameworkCore;

namespace Kyoo.Tests
{
	/// <summary>
	/// Class responsible to fill and create in memory databases for unit tests.
	/// </summary>
	public class TestContext
	{
		/// <summary>
		/// The context's options that specify to use an in memory Sqlite database.
		/// </summary>
		private readonly DbContextOptions<DatabaseContext> _context;
		
		/// <summary>
		/// Create a new database and fill it with informations.
		/// </summary>
		public TestContext()
		{
			SqliteConnection connection = new("DataSource=:memory:");
			connection.Open();

			try
			{
				_context = new DbContextOptionsBuilder<DatabaseContext>()
					.UseSqlite(connection)
					.Options;
				FillDatabase();
			}
			finally
			{
				connection.Close();
			}
		}

		/// <summary>
		/// Fill the database with pre defined values using a clean context.
		/// </summary>
		private void FillDatabase()
		{
			using DatabaseContext context = new(_context);
			context.Shows.Add(new Show
			{
				ID = 67,
				Slug = "anohana",
				Title = "Anohana: The Flower We Saw That Day",
				Aliases = new[]
				{
					"Ano Hi Mita Hana no Namae o Bokutachi wa Mada Shiranai.",
					"AnoHana",
					"We Still Don't Know the Name of the Flower We Saw That Day."
				},
				Overview = "When Yadomi Jinta was a child, he was a central piece in a group of close friends. " +
				           "In time, however, these childhood friends drifted apart, and when they became high " +
				           "school students, they had long ceased to think of each other as friends.",
				Status = Status.Finished,
				TrailerUrl = null,
				StartYear = 2011,
				EndYear = 2011,
				Poster = "poster",
				Logo = "logo",
				Backdrop = "backdrop",
				IsMovie = false,
				Studio = null
			});
		}

		/// <summary>
		/// Get a new databse context connected to a in memory Sqlite databse.
		/// </summary>
		/// <returns>A valid DatabaseContext</returns>
		public DatabaseContext New()
		{
			return new(_context);
		}
	}
}