Fix runtime benchmarks CI (#6545)

* debug (ci): ci config [skip ci]

* debug (ci): fix runtime benchmarks

* fix identity benchmarks

* fix utility benchmarks

* Revert "debug (ci): ci config [skip ci]"

This reverts commit 081b175b5e95604520c79ea4e5822b84ea35ddaa.

* change (ci): touch ci config to run CI

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: Gav Wood <gavin@parity.io>

substrate/frame/utility/src/benchmarking.rs

@@ -20,11 +20,19 @@
 #![cfg(feature = "runtime-benchmarks")]
 
 use super::*;
-use frame_system::RawOrigin;
+use frame_system::{RawOrigin, EventRecord};
 use frame_benchmarking::{benchmarks, account};
 
 const SEED: u32 = 0;
 
+fn assert_last_event<T: Trait>(generic_event: <T as Trait>::Event) {
+	let events = frame_system::Module::<T>::events();
+	let system_event: <T as frame_system::Trait>::Event = generic_event.into();
+	// compare to the last event record
+	let EventRecord { event, .. } = &events[events.len() - 1];
+	assert_eq!(event, &system_event);
+}
+
 benchmarks! {
 	_ { }
 
@@ -37,6 +45,9 @@ benchmarks! {
 		}
 		let caller = account("caller", 0, SEED);
 	}: _(RawOrigin::Signed(caller), calls)
+	verify {
+		assert_last_event::<T>(Event::BatchCompleted.into())
+	}
 
 	as_derivative {
 		let u in 0 .. 1000;