Add benchmark to node-template pallet-template (#8239)

* Add benchmark to node-template pallet-template

* export sp_std to avoid missing dep when using macro

* fix more `sp_std` deps

* remove unused

* Update bin/node-template/pallets/template/src/benchmarking.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update bin/node-template/pallets/template/Cargo.toml

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/bin/node-template/pallets/template/src/benchmarking.rs

@@ -0,0 +1,24 @@
+//! Benchmarking setup for pallet-template
+
+use super::*;
+
+use frame_system::RawOrigin;
+use frame_benchmarking::{benchmarks, whitelisted_caller, impl_benchmark_test_suite};
+#[allow(unused)]
+use crate::Module as Template;
+
+benchmarks! {
+	do_something {
+		let s in 0 .. 100;
+		let caller: T::AccountId = whitelisted_caller();
+	}: _(RawOrigin::Signed(caller), s)
+	verify {
+		assert_eq!(Something::<T>::get(), Some(s));
+	}
+}
+
+impl_benchmark_test_suite!(
+	Template,
+	crate::mock::new_test_ext(),
+	crate::mock::Test,
+);

substrate/bin/node-template/pallets/template/src/lib.rs

@@ -12,6 +12,9 @@ mod mock;
 #[cfg(test)]
 mod tests;
 
+#[cfg(feature = "runtime-benchmarks")]
+mod benchmarking;
+
 #[frame_support::pallet]
 pub mod pallet {
 	use frame_support::{dispatch::DispatchResultWithPostInfo, pallet_prelude::*};
@@ -46,7 +49,7 @@ pub mod pallet {
 		/// parameters. [something, who]
 		SomethingStored(u32, T::AccountId),
 	}
-	
+
 	// Errors inform users that something went wrong.
 	#[pallet::error]
 	pub enum Error<T> {