Generate Unit Tests for Benchmarks (#5527)

* Update to latest staking

* generate tests for benchmarking

* add tests, fix warnings

* starting on democracy

* impl_benchmark_tests

* Way more readable

* add test feature flag (does this work?)

* Fix `successful_origin` impl

* democracry benchmark tests

* Fix example benchmarks, add tests

* identity benchmark tests

* Update im-online benchmark tests

* try to add session benchmarking tests (problem with mock)

* staking and timestamp

* add test for treasury, issue with dynamic contains

* utility

* Vesting

* test instead of check

* hide until we figure out what is wrong

* add docs

* close code

* Create custom mock for session-pallet-benchmarking

* Use refcell pattern

* make un-pub

* test-linux-stable includes `runtime-benchmarks` feature

* Revert "test-linux-stable includes `runtime-benchmarks` feature"

This reverts commit a2dab38abd18ac3eb8a6220e4a00e687740bd38c.

* run tests in `--release`

* undo balance change

* build wasm

substrate/frame/session/benchmarking/src/lib.rs

@@ -19,6 +19,8 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+mod mock;
+
 use sp_std::prelude::*;
 use sp_std::vec;
 
@@ -42,16 +44,33 @@ benchmarks! {
 
 	set_keys {
 		let n in 1 .. MAX_NOMINATIONS as u32;
-		let validator = create_validator_with_nominators::<T>(n, MAX_NOMINATIONS as u32)?;
+		let v_stash = create_validator_with_nominators::<T>(n, MAX_NOMINATIONS as u32)?;
+		let v_controller = pallet_staking::Module::<T>::bonded(&v_stash).ok_or("not stash")?;
 		let keys = T::Keys::default();
 		let proof: Vec<u8> = vec![0,1,2,3];
-	}: _(RawOrigin::Signed(validator), keys, proof)
+	}: _(RawOrigin::Signed(v_controller), keys, proof)
 
 	purge_keys {
 		let n in 1 .. MAX_NOMINATIONS as u32;
-		let validator = create_validator_with_nominators::<T>(n, MAX_NOMINATIONS as u32)?;
+		let v_stash = create_validator_with_nominators::<T>(n, MAX_NOMINATIONS as u32)?;
+		let v_controller = pallet_staking::Module::<T>::bonded(&v_stash).ok_or("not stash")?;
 		let keys = T::Keys::default();
 		let proof: Vec<u8> = vec![0,1,2,3];
-		Session::<T>::set_keys(RawOrigin::Signed(validator.clone()).into(), keys, proof)?;
-	}: _(RawOrigin::Signed(validator))
+		Session::<T>::set_keys(RawOrigin::Signed(v_controller.clone()).into(), keys, proof)?;
+	}: _(RawOrigin::Signed(v_controller))
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use crate::mock::{new_test_ext, Test};
+	use frame_support::assert_ok;
+
+	#[test]
+	fn test_benchmarks() {
+		new_test_ext().execute_with(|| {
+			assert_ok!(test_benchmark_set_keys::<Test>());
+			assert_ok!(test_benchmark_purge_keys::<Test>());
+		});
+	}
 }

substrate/frame/session/benchmarking/src/mock.rs

@@ -0,0 +1,184 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Mock file for staking fuzzing.
+
+#![cfg(test)]
+
+use sp_runtime::traits::{Convert, SaturatedConversion, IdentityLookup};
+use frame_support::{impl_outer_origin, impl_outer_dispatch, parameter_types};
+
+type AccountId = u64;
+type AccountIndex = u32;
+type BlockNumber = u64;
+type Balance = u64;
+
+type System = frame_system::Module<Test>;
+type Balances = pallet_balances::Module<Test>;
+type Staking = pallet_staking::Module<Test>;
+type Session = pallet_session::Module<Test>;
+
+impl_outer_origin! {
+	pub enum Origin for Test  where system = frame_system {}
+}
+
+impl_outer_dispatch! {
+	pub enum Call for Test where origin: Origin {
+		pallet_staking::Staking,
+	}
+}
+
+pub struct CurrencyToVoteHandler;
+impl Convert<u64, u64> for CurrencyToVoteHandler {
+	fn convert(x: u64) -> u64 {
+		x
+	}
+}
+impl Convert<u128, u64> for CurrencyToVoteHandler {
+	fn convert(x: u128) -> u64 {
+		x.saturated_into()
+	}
+}
+
+#[derive(Clone, Eq, PartialEq, Debug)]
+pub struct Test;
+
+impl frame_system::Trait for Test {
+	type Origin = Origin;
+	type Index = AccountIndex;
+	type BlockNumber = BlockNumber;
+	type Call = Call;
+	type Hash = sp_core::H256;
+	type Hashing = ::sp_runtime::traits::BlakeTwo256;
+	type AccountId = AccountId;
+	type Lookup = IdentityLookup<Self::AccountId>;
+	type Header = sp_runtime::testing::Header;
+	type Event = ();
+	type BlockHashCount = ();
+	type MaximumBlockWeight = ();
+	type AvailableBlockRatio = ();
+	type MaximumBlockLength = ();
+	type Version = ();
+	type ModuleToIndex = ();
+	type AccountData = pallet_balances::AccountData<u64>;
+	type OnNewAccount = ();
+	type OnKilledAccount = (Balances,);
+}
+parameter_types! {
+	pub const ExistentialDeposit: Balance = 10;
+}
+impl pallet_balances::Trait for Test {
+	type Balance = Balance;
+	type Event = ();
+	type DustRemoval = ();
+	type ExistentialDeposit = ExistentialDeposit;
+	type AccountStore = System;
+}
+
+parameter_types! {
+	pub const MinimumPeriod: u64 = 5;
+}
+impl pallet_timestamp::Trait for Test {
+	type Moment = u64;
+	type OnTimestampSet = ();
+	type MinimumPeriod = MinimumPeriod;
+}
+impl pallet_session::historical::Trait for Test {
+	type FullIdentification = pallet_staking::Exposure<AccountId, Balance>;
+	type FullIdentificationOf = pallet_staking::ExposureOf<Test>;
+}
+
+sp_runtime::impl_opaque_keys! {
+	pub struct SessionKeys {
+		pub foo: sp_runtime::testing::UintAuthorityId,
+	}
+}
+
+pub struct TestSessionHandler;
+impl pallet_session::SessionHandler<AccountId> for TestSessionHandler {
+	const KEY_TYPE_IDS: &'static [sp_runtime::KeyTypeId] = &[];
+
+	fn on_genesis_session<Ks: sp_runtime::traits::OpaqueKeys>(_validators: &[(AccountId, Ks)]) {}
+
+	fn on_new_session<Ks: sp_runtime::traits::OpaqueKeys>(
+		_: bool,
+		_: &[(AccountId, Ks)],
+		_: &[(AccountId, Ks)],
+	) {}
+
+	fn on_disabled(_: usize) {}
+}
+
+impl pallet_session::Trait for Test {
+	type SessionManager = pallet_session::historical::NoteHistoricalRoot<Test, Staking>;
+	type Keys = SessionKeys;
+	type ShouldEndSession = pallet_session::PeriodicSessions<(), ()>;
+	type NextSessionRotation = pallet_session::PeriodicSessions<(), ()>;
+	type SessionHandler = TestSessionHandler;
+	type Event = ();
+	type ValidatorId = AccountId;
+	type ValidatorIdOf = pallet_staking::StashOf<Test>;
+	type DisabledValidatorsThreshold = ();
+}
+pallet_staking_reward_curve::build! {
+	const I_NPOS: sp_runtime::curve::PiecewiseLinear<'static> = curve!(
+		min_inflation: 0_025_000,
+		max_inflation: 0_100_000,
+		ideal_stake: 0_500_000,
+		falloff: 0_050_000,
+		max_piece_count: 40,
+		test_precision: 0_005_000,
+	);
+}
+parameter_types! {
+	pub const RewardCurve: &'static sp_runtime::curve::PiecewiseLinear<'static> = &I_NPOS;
+	pub const MaxNominatorRewardedPerValidator: u32 = 64;
+}
+
+pub type Extrinsic = sp_runtime::testing::TestXt<Call, ()>;
+type SubmitTransaction = frame_system::offchain::TransactionSubmitter<
+	sp_runtime::testing::UintAuthorityId,
+	Test,
+	Extrinsic,
+>;
+
+impl pallet_staking::Trait for Test {
+	type Currency = Balances;
+	type UnixTime = pallet_timestamp::Module<Self>;
+	type CurrencyToVote = CurrencyToVoteHandler;
+	type RewardRemainder = ();
+	type Event = ();
+	type Slash = ();
+	type Reward = ();
+	type SessionsPerEra = ();
+	type SlashDeferDuration = ();
+	type SlashCancelOrigin = frame_system::EnsureRoot<Self::AccountId>;
+	type BondingDuration = ();
+	type SessionInterface = Self;
+	type RewardCurve = RewardCurve;
+	type NextNewSession = Session;
+	type ElectionLookahead = ();
+	type Call = Call;
+	type SubmitTransaction = SubmitTransaction;
+	type MaxNominatorRewardedPerValidator = MaxNominatorRewardedPerValidator;
+}
+
+impl crate::Trait for Test {}
+
+pub fn new_test_ext() -> sp_io::TestExternalities {
+	let t = frame_system::GenesisConfig::default().build_storage::<Test>().unwrap();
+	sp_io::TestExternalities::new(t)
+}