Addresses of removed components should be reused

tests/zecsy.cpp

@@ -129,3 +129,42 @@ TEST_CASE("Remove a component from an entity and verify it is no longer attached
 
     REQUIRE_FALSE(w.has<ChoosenOne>(e));
 }
+
+TEST_CASE("Addresses of removed components should be reused")
+{
+    world w; 
+    std::vector<entity> entities;
+    std::vector<ChoosenOne*> addr;
+
+    const int N = 4;
+
+    for(int i = 0; i < 2; ++i)
+    {
+        for(int j = 0; j < N; ++j)
+        {
+            entities.emplace_back(w.make_entity());
+            entities.back().set<ChoosenOne>();
+        }
+
+        if(addr.empty())
+        {
+            for(int j = 0; j < N; ++j)
+            {
+                addr.emplace_back(&entities[j].get<ChoosenOne>());
+            }
+        }
+        else 
+        {
+            for(int j = 0; j < N; ++j)
+            {
+                REQUIRE(&entities[j].get<ChoosenOne>() == addr[j]);
+            }
+        }
+
+        for(auto e: entities)
+        {
+            e.remove<ChoosenOne>();
+        }
+        entities.clear();
+    }
+}