test: add test to catalog.load_by_filter function

01.workspace/heave/src/str/catalog.rs

@@ -1523,6 +1523,55 @@ mod tests {
 
         std::fs::remove_file(path).unwrap();
     }
+
+    #[test]
+    fn load_by_filter_should_load_matching_negative_sell_trend() {
+        let db_path = "target/test_dbs/lbf_matching_negative_sell_trend.db";
+        let path = std::path::Path::new(db_path);
+        std::fs::create_dir_all(path.parent().unwrap()).unwrap();
+        if path.exists() {
+            std::fs::remove_file(path).unwrap();
+        }
+
+        let mut catalog_setup = Catalog::new(db_path);
+        catalog_setup.init().unwrap();
+        let items = vec![
+            Item {
+                id: "item-1".to_string(),
+                name: "Item One".to_string(),
+                price: 100,
+                sell_trend: 10,
+                in_stock: true,
+            },
+            Item {
+                id: "item-2".to_string(),
+                name: "Item Two".to_string(),
+                price: 200,
+                sell_trend: -5,
+                in_stock: false,
+            },
+            Item {
+                id: "item-3".to_string(),
+                name: "Item Three".to_string(),
+                price: 300,
+                sell_trend: 10,
+                in_stock: true,
+            },
+        ];
+        catalog_setup.insert_many(items).unwrap();
+        catalog_setup.persist().unwrap();
+
+        let mut catalog = Catalog::new(db_path);
+        let filter = Filter::new().with_signed_int("sell_trend", Comparison::Equal, -5);
+        assert!(catalog.load_by_filter(&filter).is_ok());
+
+        assert_eq!(catalog.items.len(), 1);
+        assert!(catalog.items.contains_key("item-2"));
+        assert!(!catalog.items.contains_key("item-1"));
+        assert!(!catalog.items.contains_key("item-3"));
+
+        std::fs::remove_file(path).unwrap();
+    }
     // ## Integration Tests
     #[test]
     fn integration_test_init_insert_persist_load_get() {