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using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using MonoGame.Extended.Entities.Systems;
using MonoGame.Extended.Sprites;
using Xunit;
namespace MonoGame.Extended.Entities.Tests;
public class WorldManagerTests
{
private GameTime _gameTime = new GameTime(TimeSpan.Zero, TimeSpan.FromMilliseconds(16));
[Fact]
public void CrudEntity()
{
var dummySystem = new DummySystem();
var worldBuilder = new WorldBuilder();
worldBuilder.AddSystem(dummySystem);
var world = worldBuilder.Build();
world.Initialize();
var entity = world.CreateEntity();
entity.Attach(new Transform2());
world.Update(_gameTime);
world.Draw(_gameTime);
var otherEntity = world.GetEntity(entity.Id);
Assert.Equal(entity, otherEntity);
Assert.True(otherEntity.Has<Transform2>());
Assert.Contains(entity.Id, dummySystem.AddedEntitiesId);
entity.Destroy();
world.Update(_gameTime);
world.Draw(_gameTime);
otherEntity = world.GetEntity(entity.Id);
Assert.Null(otherEntity);
Assert.Contains(entity.Id, dummySystem.RemovedEntitiesId);
}
private class DummyComponent { }
private class DummySystem : EntitySystem, IUpdateSystem, IDrawSystem
{
public List<int> AddedEntitiesId { get; } = new ();
public List<int> RemovedEntitiesId { get; } = new ();
public DummySystem() : base(Aspect.All(typeof(DummyComponent))) { }
public override void Initialize(IComponentMapperService mapperService)
{
// Do NOT initialize mapper in order to test: https://github.com/craftworkgames/MonoGame.Extended/issues/707
}
public void Draw(GameTime gameTime) { }
public void Update(GameTime gameTime) { }
protected override void OnEntityAdded(int entityId)
{
base.OnEntityAdded(entityId);
AddedEntitiesId.Add(entityId);
}
protected override void OnEntityRemoved(int entityId)
{
base.OnEntityRemoved(entityId);
RemovedEntitiesId.Add(entityId);
}
}
}
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