use crate::storage::StorageDecodeLength;
pub use sp_runtime::BoundedBTreeMap;
impl<K, V, S> StorageDecodeLength for BoundedBTreeMap<K, V, S> {}
#[cfg(test)]
pub mod test {
use super::*;
use crate::Twox128;
use frame_support::traits::{ConstU32, Get};
use sp_io::TestExternalities;
use sp_std::collections::btree_map::BTreeMap;
#[crate::storage_alias]
type Foo = StorageValue<Prefix, BoundedBTreeMap<u32, (), ConstU32<7>>>;
#[crate::storage_alias]
type FooMap = StorageMap<Prefix, Twox128, u32, BoundedBTreeMap<u32, (), ConstU32<7>>>;
#[crate::storage_alias]
type FooDoubleMap =
StorageDoubleMap<Prefix, Twox128, u32, Twox128, u32, BoundedBTreeMap<u32, (), ConstU32<7>>>;
fn map_from_keys<K>(keys: &[K]) -> BTreeMap<K, ()>
where
K: Ord + Copy,
{
keys.iter().copied().zip(std::iter::repeat(())).collect()
}
fn boundedmap_from_keys<K, S>(keys: &[K]) -> BoundedBTreeMap<K, (), S>
where
K: Ord + Copy,
S: Get<u32>,
{
map_from_keys(keys).try_into().unwrap()
}
#[test]
fn decode_len_works() {
TestExternalities::default().execute_with(|| {
let bounded = boundedmap_from_keys::<u32, ConstU32<7>>(&[1, 2, 3]);
Foo::put(bounded);
assert_eq!(Foo::decode_len().unwrap(), 3);
});
TestExternalities::default().execute_with(|| {
let bounded = boundedmap_from_keys::<u32, ConstU32<7>>(&[1, 2, 3]);
FooMap::insert(1, bounded);
assert_eq!(FooMap::decode_len(1).unwrap(), 3);
assert!(FooMap::decode_len(0).is_none());
assert!(FooMap::decode_len(2).is_none());
});
TestExternalities::default().execute_with(|| {
let bounded = boundedmap_from_keys::<u32, ConstU32<7>>(&[1, 2, 3]);
FooDoubleMap::insert(1, 1, bounded);
assert_eq!(FooDoubleMap::decode_len(1, 1).unwrap(), 3);
assert!(FooDoubleMap::decode_len(2, 1).is_none());
assert!(FooDoubleMap::decode_len(1, 2).is_none());
assert!(FooDoubleMap::decode_len(2, 2).is_none());
});
}
}