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election provider support: Update some test only types (#10983)

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This commit is contained in:
Zeke Mostov
2022-03-08 12:31:20 +00:00
committed by GitHub
parent 2c373c1e16
commit c6d653ffc8
1 changed files with 6 additions and 29 deletions
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substrate/frame/election-provider-support/src/lib.rs
+6 -29
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@@ -262,33 +262,6 @@ pub trait ElectionDataProvider {
fn clear() {}
}
/// An election data provider that should only be used for testing.
#[cfg(feature = "std")]
pub struct TestDataProvider<X>(sp_std::marker::PhantomData<X>);
#[cfg(feature = "std")]
impl<AccountId, BlockNumber> ElectionDataProvider for TestDataProvider<(AccountId, BlockNumber)> {
type AccountId = AccountId;
type BlockNumber = BlockNumber;
type MaxVotesPerVoter = ();
fn targets(_maybe_max_len: Option<usize>) -> data_provider::Result<Vec<AccountId>> {
Ok(Default::default())
}
fn voters(_maybe_max_len: Option<usize>) -> data_provider::Result<Vec<VoterOf<Self>>> {
Ok(Default::default())
}
fn desired_targets() -> data_provider::Result<u32> {
Ok(Default::default())
}
fn next_election_prediction(now: BlockNumber) -> BlockNumber {
now
}
}
/// Something that can compute the result of an election and pass it back to the caller.
///
/// This trait only provides an interface to _request_ an election, i.e.
@@ -340,11 +313,15 @@ pub trait InstantElectionProvider: ElectionProvider {
pub struct NoElection<X>(sp_std::marker::PhantomData<X>);
#[cfg(feature = "std")]
impl<AccountId, BlockNumber> ElectionProvider for NoElection<(AccountId, BlockNumber)> {
impl<AccountId, BlockNumber, DataProvider> ElectionProvider
for NoElection<(AccountId, BlockNumber, DataProvider)>
where
DataProvider: ElectionDataProvider<AccountId = AccountId, BlockNumber = BlockNumber>,
{
type AccountId = AccountId;
type BlockNumber = BlockNumber;
type Error = &'static str;
type DataProvider = TestDataProvider<(AccountId, BlockNumber)>;
type DataProvider = DataProvider;
fn elect() -> Result<Supports<AccountId>, Self::Error> {
Err("<NoElection as ElectionProvider> cannot do anything.")