topsoil_core/storage/
weak_bounded_vec.rs

1// This file is part of Soil.
2
3// Copyright (C) Soil contributors.
4// Copyright (C) Parity Technologies (UK) Ltd.
5// SPDX-License-Identifier: Apache-2.0 OR GPL-3.0-or-later WITH Classpath-exception-2.0
6
7//! Traits, types and structs to support putting a bounded vector into storage, as a raw value, map
8//! or a double map.
9
10use crate::{
11	storage::{StorageDecodeLength, StorageTryAppend},
12	traits::Get,
13};
14pub use subsoil::runtime::WeakBoundedVec;
15
16impl<T, S> StorageDecodeLength for WeakBoundedVec<T, S> {}
17
18impl<T, S: Get<u32>> StorageTryAppend<T> for WeakBoundedVec<T, S> {
19	fn bound() -> usize {
20		S::get() as usize
21	}
22}
23
24#[cfg(test)]
25pub mod test {
26	use super::*;
27	use crate::Twox128;
28	use subsoil::io::TestExternalities;
29	use topsoil_core::traits::ConstU32;
30
31	#[crate::storage_alias]
32	type Foo = StorageValue<Prefix, WeakBoundedVec<u32, ConstU32<7>>>;
33	#[crate::storage_alias]
34	type FooMap = StorageMap<Prefix, Twox128, u32, WeakBoundedVec<u32, ConstU32<7>>>;
35	#[crate::storage_alias]
36	type FooDoubleMap =
37		StorageDoubleMap<Prefix, Twox128, u32, Twox128, u32, WeakBoundedVec<u32, ConstU32<7>>>;
38
39	#[test]
40	fn decode_len_works() {
41		TestExternalities::default().execute_with(|| {
42			let bounded: WeakBoundedVec<u32, ConstU32<7>> = vec![1, 2, 3].try_into().unwrap();
43			Foo::put(bounded);
44			assert_eq!(Foo::decode_len().unwrap(), 3);
45		});
46
47		TestExternalities::default().execute_with(|| {
48			let bounded: WeakBoundedVec<u32, ConstU32<7>> = vec![1, 2, 3].try_into().unwrap();
49			FooMap::insert(1, bounded);
50			assert_eq!(FooMap::decode_len(1).unwrap(), 3);
51			assert!(FooMap::decode_len(0).is_none());
52			assert!(FooMap::decode_len(2).is_none());
53		});
54
55		TestExternalities::default().execute_with(|| {
56			let bounded: WeakBoundedVec<u32, ConstU32<7>> = vec![1, 2, 3].try_into().unwrap();
57			FooDoubleMap::insert(1, 1, bounded);
58			assert_eq!(FooDoubleMap::decode_len(1, 1).unwrap(), 3);
59			assert!(FooDoubleMap::decode_len(2, 1).is_none());
60			assert!(FooDoubleMap::decode_len(1, 2).is_none());
61			assert!(FooDoubleMap::decode_len(2, 2).is_none());
62		});
63	}
64}
topsoil_core/storage/weak_bounded_vec.rs

topsoil_core/storage/
weak_bounded_vec.rs
