Add benchmark for scheduleGrandpaChange extrinsic

Author: ales-otf

pallets/admin-utils/src/benchmarking.rs

@@ -33,6 +33,17 @@ mod benchmarks {
         _(RawOrigin::Root, value);
     }
 
+    #[benchmark]
+    fn schedule_grandpa_change(a: Linear<0, 32>) {
+        let next_authorities = (1..=a)
+            .map(|idx| account("Authority", idx, 0u32))
+            .collect::<Vec<(sp_consensus_grandpa::AuthorityId, u64)>>();
+        let in_blocks = BlockNumberFor::<T>::from(42u32);
+
+        #[extrinsic_call]
+        _(RawOrigin::Root, next_authorities, in_blocks, None);
+    }
+
     #[benchmark]
     fn sudo_set_default_take() {
         #[extrinsic_call]