Move Form and Species to traits, implement a bunch of mocks

src/static_data/items.rs

@@ -133,3 +133,26 @@ impl ValueIdentifiable for ItemImpl {
         self.identifier
     }
 }
+
+#[cfg(test)]
+pub(crate) mod tests {
+    use super::*;
+
+    mockall::mock! {
+        #[derive(Debug)]
+        pub Item {}
+        impl Item for Item {
+            fn name(&self) -> &StringKey;
+            fn category(&self) -> ItemCategory;
+            fn battle_category(&self) -> BattleItemCategory;
+            fn price(&self) -> i32;
+            fn flags(&self) -> &HashSet<StringKey>;
+            fn has_flag(&self, key: &StringKey) -> bool;
+        }
+        impl ValueIdentifiable for Item {
+            fn value_identifier(&self) -> ValueIdentifier {
+                ValueIdentifier::new(0)
+            }
+        }
+    }
+}