feat(test): Inserting in method arg

linting/ui/fail/storage_never_freed.rs

@@ -11,28 +11,35 @@ pub mod storage_never_freed {
     pub struct StorageNeverFreed {
         // All the fields generate warnings, since there are `insert` operations for
         // them, but there are no `remove` operations.
-        vec_field: Vec<AccountId>,
+        vec_field_1: Vec<AccountId>,
         vec_field_subscription: Vec<AccountId>,
-        map_field: Mapping<AccountId, AccountId>,
+        map_field_1: Mapping<AccountId, AccountId>,
+        map_field_2: Mapping<AccountId, AccountId>,
         map_field_alias: MapAlias2<AccountId, AccountId>,
     }
 
     impl StorageNeverFreed {
         #[ink(constructor)]
         pub fn new() -> Self {
             Self {
-                vec_field: Vec::new(),
+                vec_field_1: Vec::new(),
                 vec_field_subscription: Vec::new(),
-                map_field: Mapping::new(),
+                map_field_1: Mapping::new(),
+                map_field_2: Mapping::new(),
                 map_field_alias: Mapping::new(),
             }
         }
 
+        fn flip(a: bool) -> bool {
+            !a
+        }
+
         #[ink(message)]
         pub fn add_to_fields(&mut self, v: AccountId) {
-            self.vec_field.push(v);
-            self.map_field.insert(v, &v);
+            self.vec_field_1.push(v);
             self.vec_field_subscription[0] = v;
+            self.map_field_1.insert(v, &v);
+            let _ = Self::flip(self.map_field_2.insert(v, &v).is_some());
             self.map_field_alias.insert(v, &v);
         }
     }

linting/ui/fail/storage_never_freed.stderr

@@ -1,8 +1,8 @@
 error: storage never freed
   --> $DIR/storage_never_freed.rs:16:9
    |
-LL |         map_field: Mapping<AccountId, AccountId>,
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |         map_field_1: Mapping<AccountId, AccountId>,
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/storage_never_freed.rs:1:46
@@ -11,19 +11,30 @@ LL | #![cfg_attr(dylint_lib = "ink_linting", deny(storage_never_freed))]
    |                                              ^^^^^^^^^^^^^^^^^^^
 help: consider adding operations to remove elements available to the user
    |
-LL |         map_field: Mapping<AccountId, AccountId>,
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+LL |         map_field_1: Mapping<AccountId, AccountId>,
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+error: storage never freed
+  --> $DIR/storage_never_freed.rs:17:9
+   |
+LL |         map_field_2: Mapping<AccountId, AccountId>,
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: consider adding operations to remove elements available to the user
+   |
+LL |         map_field_2: Mapping<AccountId, AccountId>,
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 error: storage never freed
   --> $DIR/storage_never_freed.rs:14:9
    |
-LL |         vec_field: Vec<AccountId>,
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |         vec_field_1: Vec<AccountId>,
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 help: consider adding operations to remove elements available to the user
    |
-LL |         vec_field: Vec<AccountId>,
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~
+LL |         vec_field_1: Vec<AccountId>,
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 error: storage never freed
   --> $DIR/storage_never_freed.rs:15:9
@@ -36,5 +47,5 @@ help: consider adding operations to remove elements available to the user
 LL |         vec_field_subscription: Vec<AccountId>,
    |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors