Fix refund benchmark for pallet_assets (#14561)

* Fix refund benchmark for pallet_assets

* Update frame/assets/src/benchmarking.rs

Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

* Re-added docs

* Another "fix"

---------

Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: parity-processbot <>

frame/assets/src/benchmarking.rs

@@ -514,8 +514,8 @@ benchmarks_instance_pallet! {
 			SystemOrigin::Signed(new_account.clone()).into(),
 			asset_id
 		).is_ok());
-		// `touch` should reserve some balance of the caller...
-		assert!(!T::Currency::reserved_balance(&new_account).is_zero());
+		// `touch` should reserve balance of the caller according to the `AssetAccountDeposit` amount...
+		assert_eq!(T::Currency::reserved_balance(&new_account), T::AssetAccountDeposit::get());
 		// ...and also create an `Account` entry.
 		assert!(Account::<T, I>::contains_key(asset_id.into(), &new_account));
 	}: _(SystemOrigin::Signed(new_account.clone()), asset_id, true)
@@ -535,8 +535,8 @@ benchmarks_instance_pallet! {
 			asset_id,
 			new_account_lookup.clone()
 		).is_ok());
-		// `touch_other` should reserve balance of the freezer
-		assert!(!T::Currency::reserved_balance(&asset_owner).is_zero());
+		// `touch` should reserve balance of the caller according to the `AssetAccountDeposit` amount...
+		assert_eq!(T::Currency::reserved_balance(&asset_owner), T::AssetAccountDeposit::get());
 		assert!(Account::<T, I>::contains_key(asset_id.into(), &new_account));
 	}: _(SystemOrigin::Signed(asset_owner.clone()), asset_id, new_account_lookup.clone())
 	verify {