public void ContextSets()
{
var context = new Context();
var entity = context.CreateEntity("original");
var component = new AComponent("a1");
// set doesn't match until component is attached
var setA = context.CreateSet(e => e.Contains <AComponent>());
{
Assert.AreEqual(0, setA.Count);
entity.Add(component);
// set should automatically match after component is added
foreach (var e in setA)
{
Assert.AreEqual(component, e.Get <AComponent>());
}
Assert.AreEqual(1, setA.Count);
}
// B doesn't match 'entity' because it doesn't have a BComponent.
{
Assert.AreEqual(1, setA.Count);
var setB = context.CreateSet(e => e.Contains <BComponent>());
Assert.AreEqual(0, setB.Count);
}
// A doesn't match because it must be A AND B
{
Assert.AreEqual(1, setA.Count);
Assert.IsFalse(entity.Contains <BComponent>());
var setAandB = context.CreateSet(e => e.Contains <AComponent>() && e.Contains <BComponent>());
Assert.AreNotSame(setA, setAandB);
Assert.AreEqual(0, setAandB.Count, "IEntity should not match, has no BComponent");
var entityAandB = context.CreateEntity("ab");
entityAandB.Add(new AComponent("ab test"));
entityAandB.Add(new BComponent());
Assert.AreEqual(1, setAandB.Count, "IEntity should match, has A and B Components");
Assert.AreEqual(2, setA.Count, "Set A should now match both");
context.ReleaseEntity(entityAandB);
Assert.AreEqual(0, setAandB.Count, "IEntity should not match, was removed.");
}
// another A set should also match
{
var setA2 = context.CreateSet(e => e.Contains <AComponent>());
foreach (var e in setA2)
{
Assert.AreEqual(component, e.Get <AComponent>());
}
Assert.AreEqual(1, setA2.Count);
}
// set should not increase the entities matched if another component is added
{
Assert.AreEqual(1, setA.Count);
entity.Add(new AComponent("inner"));
Assert.AreEqual(1, setA.Count);
}
}
public void ContextSetEdgeCases()
{
var context = new Context();
var entity = context.CreateEntity("edge");
entity.Add(new AComponent("a"));
entity.Add(new BComponent());
var set = context.CreateSet(e => e.Contains <AComponent>() && e.Contains <BComponent>());
Assert.AreEqual(1, set.Count, "Set should only have 1 entity when it matches 2 components");
}
public void ContextSetRemoval()
{
var context = new Context();
var set = context.CreateSet(e => e.Contains <AComponent>());
var entity = context.CreateEntity("set");
var component = new AComponent("a1");
entity.Add(component);
// sanity check
Assert.AreEqual(1, set.Count);
Assert.AreSame(entity, set.First());
Assert.AreSame(component, set.First().First());
// remove entity, should remove components
context.ReleaseEntity(entity);
Assert.AreEqual(0, set.Count);
Assert.IsNull(set.FirstOrDefault());
}
