feat: initialize Kurdistan SDK - independent fork of Polkadot SDK
This commit is contained in:
@@ -0,0 +1,612 @@
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// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Tests for solution-type.
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#![cfg(test)]
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use crate::{
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mock::*, BoundedSupport, BoundedSupports, IndexAssignment, NposSolution, TryFromOtherBounds,
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};
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use frame_support::traits::ConstU32;
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use rand::SeedableRng;
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use sp_npos_elections::{Support, Supports};
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mod solution_type {
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use super::*;
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use codec::{Decode, Encode, MaxEncodedLen};
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// these need to come from the same dev-dependency `frame-election-provider-support`, not from
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// the crate.
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use crate::{generate_solution_type, Assignment, Error as NposError, NposSolution};
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use core::fmt::Debug;
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#[allow(dead_code)]
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mod __private {
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// This is just to make sure that the solution can be generated in a scope without any
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// imports.
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use crate::generate_solution_type;
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generate_solution_type!(
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#[compact]
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struct InnerTestSolutionIsolated::<
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VoterIndex = u32,
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TargetIndex = u8,
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Accuracy = sp_runtime::Percent,
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MaxVoters = crate::tests::ConstU32::<20>,
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>(12)
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);
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}
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#[test]
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fn solution_struct_works_with_and_without_compact() {
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// we use u32 size to make sure compact is smaller.
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let without_compact = {
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generate_solution_type!(
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pub struct InnerTestSolution::<
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VoterIndex = u32,
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TargetIndex = u32,
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Accuracy = TestAccuracy,
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MaxVoters = ConstU32::<20>,
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>(16)
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);
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let solution = InnerTestSolution {
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votes1: vec![(2, 20), (4, 40)],
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votes2: vec![(1, [(10, p(80))], 11), (5, [(50, p(85))], 51)],
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..Default::default()
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};
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solution.encode().len()
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};
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let with_compact = {
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generate_solution_type!(
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#[compact]
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pub struct InnerTestSolutionCompact::<
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VoterIndex = u32,
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TargetIndex = u32,
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Accuracy = TestAccuracy,
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MaxVoters = ConstU32::<20>,
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>(16)
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);
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let compact = InnerTestSolutionCompact {
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votes1: vec![(2, 20), (4, 40)],
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votes2: vec![(1, [(10, p(80))], 11), (5, [(50, p(85))], 51)],
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..Default::default()
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};
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compact.encode().len()
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};
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assert!(with_compact < without_compact);
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}
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#[test]
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fn from_assignment_fail_too_many_voters() {
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let rng = rand::rngs::SmallRng::seed_from_u64(1);
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// This will produce 24 voters..
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let (voters, assignments, candidates) = generate_random_votes(10, 25, rng);
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let voter_index = make_voter_fn(&voters);
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let target_index = make_target_fn(&candidates);
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// Limit the voters to 20..
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generate_solution_type!(
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pub struct InnerTestSolution::<
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VoterIndex = u32,
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TargetIndex = u16,
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Accuracy = TestAccuracy,
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MaxVoters = frame_support::traits::ConstU32::<20>,
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>(16)
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);
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// 24 > 20, so this should fail.
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assert_eq!(
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InnerTestSolution::from_assignment(&assignments, &voter_index, &target_index)
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.unwrap_err(),
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NposError::TooManyVoters,
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);
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}
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#[test]
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fn max_encoded_len_too_small() {
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generate_solution_type!(
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pub struct InnerTestSolution::<
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VoterIndex = u32,
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TargetIndex = u32,
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Accuracy = TestAccuracy,
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MaxVoters = ConstU32::<1>,
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>(3)
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);
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let solution = InnerTestSolution {
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votes1: vec![(2, 20), (4, 40)],
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votes2: vec![(1, [(10, p(80))], 11), (5, [(50, p(85))], 51)],
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..Default::default()
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};
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// We actually have 4 voters, but the bound is 1 voter, so the implemented bound is too
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// small.
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assert!(solution.encode().len() > InnerTestSolution::max_encoded_len());
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}
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#[test]
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fn max_encoded_len_upper_bound() {
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generate_solution_type!(
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pub struct InnerTestSolution::<
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VoterIndex = u32,
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TargetIndex = u32,
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Accuracy = TestAccuracy,
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MaxVoters = ConstU32::<4>,
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>(3)
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);
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let solution = InnerTestSolution {
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votes1: vec![(2, 20), (4, 40)],
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votes2: vec![(1, [(10, p(80))], 11), (5, [(50, p(85))], 51)],
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..Default::default()
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};
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// We actually have 4 voters, and the bound is 4 voters, so the implemented bound should be
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// larger than the encoded len.
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assert!(solution.encode().len() < InnerTestSolution::max_encoded_len());
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}
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#[test]
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fn max_encoded_len_exact() {
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generate_solution_type!(
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pub struct InnerTestSolution::<
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VoterIndex = u32,
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TargetIndex = u32,
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Accuracy = TestAccuracy,
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MaxVoters = ConstU32::<4>,
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>(3)
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);
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let solution = InnerTestSolution {
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votes1: vec![],
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votes2: vec![],
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votes3: vec![
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(1, [(10, p(50)), (11, p(20))], 12),
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(2, [(20, p(50)), (21, p(20))], 22),
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(3, [(30, p(50)), (31, p(20))], 32),
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(4, [(40, p(50)), (41, p(20))], 42),
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],
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};
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// We have 4 voters, the bound is 4 voters, and all the voters voted for 3 targets, which is
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// the max number of targets. This should represent the upper bound that `max_encoded_len`
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// represents.
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assert_eq!(solution.encode().len(), InnerTestSolution::max_encoded_len());
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}
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#[test]
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fn solution_struct_is_codec() {
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let solution = TestSolution {
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votes1: vec![(2, 20), (4, 40)],
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votes2: vec![(1, [(10, p(80))], 11), (5, [(50, p(85))], 51)],
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..Default::default()
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};
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let encoded = solution.encode();
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assert_eq!(solution, Decode::decode(&mut &encoded[..]).unwrap());
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assert_eq!(solution.voter_count(), 4);
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assert_eq!(solution.edge_count(), 2 + 4);
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assert_eq!(solution.unique_targets(), vec![10, 11, 20, 40, 50, 51]);
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}
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#[test]
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fn remove_voter_works() {
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let mut solution = TestSolution {
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votes1: vec![(0, 2), (1, 6)],
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votes2: vec![(2, [(0, p(80))], 1), (3, [(7, p(85))], 8)],
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votes3: vec![(4, [(3, p(50)), (4, p(25))], 5)],
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..Default::default()
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};
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assert!(!solution.remove_voter(11));
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assert!(solution.remove_voter(2));
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assert_eq!(
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solution,
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TestSolution {
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votes1: vec![(0, 2), (1, 6)],
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votes2: vec![(3, [(7, p(85))], 8)],
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votes3: vec![(4, [(3, p(50)), (4, p(25))], 5,)],
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..Default::default()
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},
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);
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assert!(solution.remove_voter(4));
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assert_eq!(
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solution,
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TestSolution {
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votes1: vec![(0, 2), (1, 6)],
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votes2: vec![(3, [(7, p(85))], 8)],
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..Default::default()
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},
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);
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assert!(solution.remove_voter(1));
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assert_eq!(
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solution,
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TestSolution {
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votes1: vec![(0, 2)],
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votes2: vec![(3, [(7, p(85))], 8),],
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..Default::default()
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},
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);
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}
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#[test]
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fn prevents_target_duplicate_into_assignment() {
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let voter_at = |a: u32| -> Option<AccountId> { Some(a as AccountId) };
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let target_at = |a: u16| -> Option<AccountId> { Some(a as AccountId) };
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// case 1: duplicate target in votes2.
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let solution = TestSolution { votes2: vec![(0, [(1, p(50))], 1)], ..Default::default() };
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
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NposError::DuplicateTarget,
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);
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// case 2: duplicate target in votes3.
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let solution =
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TestSolution { votes3: vec![(0, [(1, p(25)), (2, p(50))], 1)], ..Default::default() };
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
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NposError::DuplicateTarget,
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);
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}
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#[test]
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fn prevents_voter_duplicate_into_assignment() {
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let voter_at = |a: u32| -> Option<AccountId> { Some(a as AccountId) };
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let target_at = |a: u16| -> Option<AccountId> { Some(a as AccountId) };
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// case 1: there is a duplicate among two different fields
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let solution = TestSolution {
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// voter index 0 is present here
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votes1: vec![(0, 0), (1, 0)],
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// voter index 0 is also present here
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votes2: vec![(0, [(1, p(50))], 2)],
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..Default::default()
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};
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
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NposError::DuplicateVoter,
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);
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// case 2: there is a duplicate in the same field
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let solution = TestSolution { votes1: vec![(0, 0), (0, 1)], ..Default::default() };
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
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NposError::DuplicateVoter,
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);
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// case 2.1: there is a duplicate in the same fieild, a bit more complex
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let solution = TestSolution {
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votes1: vec![(0, 0)],
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votes2: vec![(1, [(1, p(50))], 2), (1, [(3, p(50))], 4)],
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..Default::default()
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};
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
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NposError::DuplicateVoter,
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);
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}
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#[test]
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fn from_and_into_assignment_works() {
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let voters = vec![2 as AccountId, 4, 1, 5, 3];
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let targets = vec![
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10 as AccountId,
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11,
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20, // 2
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30,
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31, // 4
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32,
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40, // 6
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50,
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51, // 8
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];
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let assignments = vec![
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Assignment { who: 2 as AccountId, distribution: vec![(20u64, p(100))] },
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Assignment { who: 4, distribution: vec![(40, p(100))] },
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Assignment { who: 1, distribution: vec![(10, p(80)), (11, p(20))] },
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Assignment { who: 5, distribution: vec![(50, p(85)), (51, p(15))] },
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Assignment { who: 3, distribution: vec![(30, p(50)), (31, p(25)), (32, p(25))] },
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];
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let voter_index = |a: &AccountId| -> Option<u32> {
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voters.iter().position(|x| x == a).map(TryInto::try_into).unwrap().ok()
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};
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let target_index = |a: &AccountId| -> Option<u16> {
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targets.iter().position(|x| x == a).map(TryInto::try_into).unwrap().ok()
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};
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let solution =
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TestSolution::from_assignment(&assignments, voter_index, target_index).unwrap();
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// basically number of assignments that it is encoding.
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assert_eq!(solution.voter_count(), assignments.len());
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assert_eq!(
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solution.edge_count(),
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assignments.iter().fold(0, |a, b| a + b.distribution.len()),
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);
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assert_eq!(
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solution,
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TestSolution {
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votes1: vec![(0, 2), (1, 6)],
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votes2: vec![(2, [(0, p(80))], 1), (3, [(7, p(85))], 8)],
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votes3: vec![(4, [(3, p(50)), (4, p(25))], 5)],
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..Default::default()
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}
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);
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assert_eq!(solution.unique_targets(), vec![0, 1, 2, 3, 4, 5, 6, 7, 8]);
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let voter_at = |a: u32| -> Option<AccountId> {
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voters.get(<u32 as TryInto<usize>>::try_into(a).unwrap()).cloned()
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};
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let target_at = |a: u16| -> Option<AccountId> {
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targets.get(<u16 as TryInto<usize>>::try_into(a).unwrap()).cloned()
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};
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assert_eq!(solution.into_assignment(voter_at, target_at).unwrap(), assignments);
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}
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#[test]
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fn unique_targets_len_edge_count_works() {
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// we don't really care about voters here so all duplicates. This is not invalid per se.
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let solution = TestSolution {
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votes1: vec![(99, 1), (99, 2)],
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votes2: vec![(99, [(3, p(10))], 7), (99, [(4, p(10))], 8)],
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votes3: vec![(99, [(11, p(10)), (12, p(10))], 13)],
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// ensure the last one is also counted.
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votes16: vec![(
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99,
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[
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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(66, p(10)),
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],
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67,
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)],
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..Default::default()
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};
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assert_eq!(solution.unique_targets(), vec![1, 2, 3, 4, 7, 8, 11, 12, 13, 66, 67]);
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assert_eq!(solution.edge_count(), 2 + (2 * 2) + 3 + 16);
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assert_eq!(solution.voter_count(), 6);
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// this one has some duplicates.
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let solution = TestSolution {
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votes1: vec![(99, 1), (99, 1)],
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votes2: vec![(99, [(3, p(10))], 7), (99, [(4, p(10))], 8)],
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votes3: vec![(99, [(11, p(10)), (11, p(10))], 13)],
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..Default::default()
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};
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assert_eq!(solution.unique_targets(), vec![1, 3, 4, 7, 8, 11, 13]);
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assert_eq!(solution.edge_count(), 2 + (2 * 2) + 3);
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assert_eq!(solution.voter_count(), 5);
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}
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#[test]
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fn solution_into_assignment_must_report_overflow() {
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// in votes2
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let solution = TestSolution {
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votes1: Default::default(),
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votes2: vec![(0, [(1, p(100))], 2)],
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..Default::default()
|
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};
|
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|
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let voter_at = |a: u32| -> Option<AccountId> { Some(a as AccountId) };
|
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let target_at = |a: u16| -> Option<AccountId> { Some(a as AccountId) };
|
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|
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
|
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NposError::SolutionWeightOverflow,
|
||||
);
|
||||
|
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// in votes3 onwards
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let solution = TestSolution {
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votes1: Default::default(),
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votes2: Default::default(),
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votes3: vec![(0, [(1, p(70)), (2, p(80))], 3)],
|
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..Default::default()
|
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};
|
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|
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assert_eq!(
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solution.into_assignment(&voter_at, &target_at).unwrap_err(),
|
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NposError::SolutionWeightOverflow,
|
||||
);
|
||||
}
|
||||
|
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#[test]
|
||||
fn target_count_overflow_is_detected() {
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let voter_index = |a: &AccountId| -> Option<u32> { Some(*a as u32) };
|
||||
let target_index = |a: &AccountId| -> Option<u16> { Some(*a as u16) };
|
||||
|
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let assignments = vec![Assignment {
|
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who: 1 as AccountId,
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distribution: (10..27).map(|i| (i as AccountId, p(i as u8))).collect::<Vec<_>>(),
|
||||
}];
|
||||
|
||||
let solution = TestSolution::from_assignment(&assignments, voter_index, target_index);
|
||||
assert_eq!(solution.unwrap_err(), NposError::SolutionTargetOverflow);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn zero_target_count_is_ignored() {
|
||||
let voters = vec![1 as AccountId, 2];
|
||||
let targets = vec![10 as AccountId, 11];
|
||||
|
||||
let assignments = vec![
|
||||
Assignment { who: 1 as AccountId, distribution: vec![(10, p(50)), (11, p(50))] },
|
||||
Assignment { who: 2, distribution: vec![] },
|
||||
];
|
||||
|
||||
let voter_index = |a: &AccountId| -> Option<u32> {
|
||||
voters.iter().position(|x| x == a).map(TryInto::try_into).unwrap().ok()
|
||||
};
|
||||
let target_index = |a: &AccountId| -> Option<u16> {
|
||||
targets.iter().position(|x| x == a).map(TryInto::try_into).unwrap().ok()
|
||||
};
|
||||
|
||||
let solution =
|
||||
TestSolution::from_assignment(&assignments, voter_index, target_index).unwrap();
|
||||
|
||||
assert_eq!(
|
||||
solution,
|
||||
TestSolution {
|
||||
votes1: Default::default(),
|
||||
votes2: vec![(0, [(0, p(50))], 1)],
|
||||
..Default::default()
|
||||
}
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn index_assignments_generate_same_solution_as_plain_assignments() {
|
||||
let rng = rand::rngs::SmallRng::seed_from_u64(0);
|
||||
|
||||
let (voters, assignments, candidates) = generate_random_votes(1000, 2500, rng);
|
||||
let voter_index = make_voter_fn(&voters);
|
||||
let target_index = make_target_fn(&candidates);
|
||||
|
||||
let solution =
|
||||
TestSolution::from_assignment(&assignments, &voter_index, &target_index).unwrap();
|
||||
|
||||
let index_assignments = assignments
|
||||
.into_iter()
|
||||
.map(|assignment| IndexAssignment::new(&assignment, &voter_index, &target_index))
|
||||
.collect::<Result<Vec<_>, _>>()
|
||||
.unwrap();
|
||||
|
||||
let index_compact = index_assignments.as_slice().try_into().unwrap();
|
||||
|
||||
assert_eq!(solution, index_compact);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn try_from_other_bounds_works() {
|
||||
let bounded: BoundedSupports<u32, ConstU32<2>, ConstU32<2>> = vec![
|
||||
(1, Support { total: 100, voters: vec![(1, 50), (2, 50)] }),
|
||||
(2, Support { total: 100, voters: vec![(1, 50), (2, 50)] }),
|
||||
]
|
||||
.try_into()
|
||||
.unwrap();
|
||||
|
||||
// either of the bounds are smaller, won't convert
|
||||
assert!(BoundedSupports::<u32, ConstU32<1>, ConstU32<2>>::try_from_other_bounds(
|
||||
bounded.clone()
|
||||
)
|
||||
.is_err());
|
||||
assert!(BoundedSupports::<u32, ConstU32<2>, ConstU32<1>>::try_from_other_bounds(
|
||||
bounded.clone()
|
||||
)
|
||||
.is_err());
|
||||
|
||||
// bounds are equal, will convert
|
||||
assert!(BoundedSupports::<u32, ConstU32<2>, ConstU32<2>>::try_from_other_bounds(
|
||||
bounded.clone()
|
||||
)
|
||||
.is_ok());
|
||||
|
||||
// bounds are larger, will convert
|
||||
assert!(BoundedSupports::<u32, ConstU32<3>, ConstU32<2>>::try_from_other_bounds(
|
||||
bounded.clone()
|
||||
)
|
||||
.is_ok());
|
||||
assert!(BoundedSupports::<u32, ConstU32<3>, ConstU32<3>>::try_from_other_bounds(
|
||||
bounded.clone()
|
||||
)
|
||||
.is_ok());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn support_sorted_truncate_from_works() {
|
||||
let support = Support { total: 100, voters: vec![(1, 50), (2, 30), (3, 20)] };
|
||||
|
||||
let (bounded, backers_removed) =
|
||||
BoundedSupport::<u32, ConstU32<1>>::sorted_truncate_from(support.clone());
|
||||
assert_eq!(bounded, Support { total: 50, voters: vec![(1, 50)] }.try_into().unwrap());
|
||||
assert_eq!(backers_removed, 2);
|
||||
|
||||
let (bounded, backers_removed) =
|
||||
BoundedSupport::<u32, ConstU32<2>>::sorted_truncate_from(support.clone());
|
||||
assert_eq!(bounded, Support { total: 80, voters: vec![(1, 50), (2, 30)] }.try_into().unwrap());
|
||||
assert_eq!(backers_removed, 1);
|
||||
|
||||
let (bounded, backers_removed) =
|
||||
BoundedSupport::<u32, ConstU32<3>>::sorted_truncate_from(support.clone());
|
||||
assert_eq!(
|
||||
bounded,
|
||||
Support { total: 100, voters: vec![(1, 50), (2, 30), (3, 20)] }
|
||||
.try_into()
|
||||
.unwrap()
|
||||
);
|
||||
assert_eq!(backers_removed, 0);
|
||||
|
||||
let (bounded, backers_removed) =
|
||||
BoundedSupport::<u32, ConstU32<4>>::sorted_truncate_from(support.clone());
|
||||
assert_eq!(
|
||||
bounded,
|
||||
Support { total: 100, voters: vec![(1, 50), (2, 30), (3, 20)] }
|
||||
.try_into()
|
||||
.unwrap()
|
||||
);
|
||||
assert_eq!(backers_removed, 0);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn supports_sorted_truncate_from_works() {
|
||||
let supports: Supports<u32> = vec![
|
||||
(1, Support { total: 303, voters: vec![(100, 100), (101, 101), (102, 102)] }),
|
||||
(2, Support { total: 201, voters: vec![(100, 100), (101, 101)] }),
|
||||
(3, Support { total: 406, voters: vec![(100, 100), (101, 101), (102, 102), (103, 103)] }),
|
||||
];
|
||||
|
||||
let (bounded, winners_removed, backers_removed) =
|
||||
BoundedSupports::<u32, ConstU32<2>, ConstU32<2>>::sorted_truncate_from(supports);
|
||||
// we trim 2 as it has least total support, and trim backers based on stake.
|
||||
assert_eq!(
|
||||
bounded
|
||||
.clone()
|
||||
.into_iter()
|
||||
.map(|(k, v)| (k, Support { total: v.total, voters: v.voters.into_inner() }))
|
||||
.collect::<Vec<_>>(),
|
||||
vec![
|
||||
(3, Support { total: 205, voters: vec![(103, 103), (102, 102)] }),
|
||||
(1, Support { total: 203, voters: vec![(102, 102), (101, 101)] })
|
||||
]
|
||||
);
|
||||
assert_eq!(winners_removed, 1);
|
||||
assert_eq!(backers_removed, 3);
|
||||
}
|
||||
Reference in New Issue
Block a user