fix: Repartition input schedules in canister migration in state machi…

…ne tests (#3381)

rs/state_machine_tests/src/lib.rs

@@ -2569,8 +2569,7 @@ impl StateMachine {
     /// After you import the canister, you can execute methods on it and upgrade it.
     /// The original directory is not modified.
     ///
-    /// The function is currently not used in code, but it is useful for local
-    /// testing and debugging. Do not remove it.
+    /// This function is useful for local testing and debugging. Do not remove it.
     ///
     /// # Panics
     ///
@@ -2580,6 +2579,8 @@ impl StateMachine {
         canister_directory: P,
         canister_id: CanisterId,
     ) {
+        use ic_replicated_state::testing::SystemStateTesting;
+
         let canister_directory = canister_directory.as_ref();
         assert!(
             canister_directory.is_dir(),
@@ -2632,7 +2633,7 @@ impl StateMachine {
             }
         }
 
-        let canister_state = ic_state_manager::checkpoint::load_canister_state(
+        let mut canister_state = ic_state_manager::checkpoint::load_canister_state(
             &tip_canister_layout,
             &canister_id,
             ic_types::Height::new(0),
@@ -2649,7 +2650,14 @@ impl StateMachine {
         .0;
 
         let (h, mut state) = self.state_manager.take_tip();
+
+        // Repartition input schedules; Required step for migrating canisters.
+        canister_state
+            .system_state
+            .split_input_schedules(&canister_id, &state.canister_states);
+
         state.put_canister_state(canister_state);
+
         self.state_manager.commit_and_certify(
             state,
             h.increment(),