Fix pov-recovery test

cumulus/client/pov-recovery/src/tests.rs

@@ -17,7 +17,9 @@
 use super::*;
 use assert_matches::assert_matches;
 use codec::{Decode, Encode};
-use cumulus_primitives_core::relay_chain::{BlockId, CandidateCommitments, CandidateDescriptor};
+use cumulus_primitives_core::relay_chain::{
+	BlockId, CandidateCommitments, CandidateDescriptor, CoreState,
+};
 use cumulus_relay_chain_interface::{
 	InboundDownwardMessage, InboundHrmpMessage, OccupiedCoreAssumption, PHash, PHeader,
 	PersistedValidationData, StorageValue, ValidationCodeHash, ValidatorId,
@@ -478,6 +480,13 @@ impl RelayChainInterface for Relaychain {
 	async fn header(&self, _: BlockId) -> RelayChainResult<Option<PHeader>> {
 		unimplemented!("Not needed for test");
 	}
+
+	async fn availability_cores(
+		&self,
+		_: PHash,
+	) -> RelayChainResult<Vec<CoreState<PHash, NumberFor<Block>>>> {
+		unimplemented!("Not needed for test");
+	}
 }
 
 fn make_candidate_chain(candidate_number_range: Range<u32>) -> Vec<CommittedCandidateReceipt> {