src/test/java/InventoryTest.java

@@ -34,4 +34,14 @@ public class InventoryTest {
         ));
     }
 
+    @Test
+    void item_can_not_be_added_if_it_exeeds_weight_limit() {
+        var capacity = new InventoryCapacity(5);
+        var inventory = new Inventory(capacity);
+        var item = new BasicItem("iron_sword", "Iron Sword", 10);
+        var stack = new ItemStack(item, 1);
+        inventory.addItem(stack);
+        assertThat(inventory.getItems().size(), is(0));
+    }
+
 }