mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 20:27:58 +00:00
Vivek Pandya
bc53b9a03a
* Change copyright year to 2023 from 2022 * Fix incorrect update of copyright year * Remove years from copy right header * Fix remaining files * Fix typo in a header and remove update-copyright.sh
59 lines
1.9 KiB
Rust
59 lines
1.9 KiB
Rust
// 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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//! # Running
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//! Running this fuzzer can be done with `cargo hfuzz run normalize`. `honggfuzz` CLI options can
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//! be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
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//!
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//! # Debugging a panic
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//! Once a panic is found, it can be debugged with
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//! `cargo hfuzz run-debug normalize hfuzz_workspace/normalize/*.fuzz`.
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use honggfuzz::fuzz;
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use sp_arithmetic::Normalizable;
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type Ty = u64;
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fn main() {
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let sum_limit = Ty::max_value() as u128;
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let len_limit: usize = Ty::max_value().try_into().unwrap();
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loop {
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fuzz!(|data: (Vec<Ty>, Ty)| {
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let (data, norm) = data;
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if data.is_empty() {
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return
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}
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let pre_sum: u128 = data.iter().map(|x| *x as u128).sum();
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let normalized = data.normalize(norm);
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// error cases.
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if pre_sum > sum_limit || data.len() > len_limit {
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assert!(normalized.is_err())
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} else if let Ok(normalized) = normalized {
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// if sum goes beyond u128, panic.
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let sum: u128 = normalized.iter().map(|x| *x as u128).sum();
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// if this function returns Ok(), then it will ALWAYS be accurate.
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assert_eq!(sum, norm as u128, "sums don't match {:?}, {}", normalized, norm);
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} else {
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panic!("Should have returned Ok for input = {:?}, target = {:?}", data, norm);
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}
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})
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}
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}
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