fix create after insert when id == entitySequence

Author: jprochazk

src/ecs.test.ts

@@ -203,6 +203,15 @@ describe("behavior", function () {
         expect(world.create()).toEqual(201);
     });
 
+    it("insert does not break sequence when entity == world.entitySequence", function () {
+        const world = new World;
+
+        const a = world.insert(0);
+        const b = world.create(); // should be 1
+
+        expect(a + 1).toEqual(b);
+    });
+
     it("view doesn't loop infinitely", function () {
         const world = new World;
         world.create(A);

src/world.ts

@@ -82,7 +82,7 @@ export class World {
      */
     insert<T extends Component[]>(entity: Entity, ...components: T): Entity {
         // ensure this doesn't break our entity sequence
-        if (entity > this.entitySequence) this.entitySequence = entity + 1;
+        if (entity >= this.entitySequence) this.entitySequence = entity + 1;
         this.entities.add(entity);
         for (let i = 0, len = components.length; i < len; ++i) {
             this.emplace(entity, components[i]);