auction clear + test

x/cosmostest/memdb/biddb.go

@@ -112,3 +112,13 @@ func (b *bidDB) GetHighestBid(auctionId string) (*types.Bid, error) {
 
 	return bid, err
 }
+
+func (b *bidDB) ClearAuction(auctionId string) error {
+	k := []byte(auctionId)
+
+	err := b.db.Update(func(txn *badger.Txn) error {
+		return txn.Delete(k)
+	})
+
+	return err
+}

x/cosmostest/memdb/biddb_test.go

@@ -3,6 +3,8 @@ package memdb
 import (
 	"cosmos-test/x/cosmostest/types"
 	"testing"
+
+	"github.com/dgraph-io/badger/v3"
 )
 
 func TestBasicFlow(t *testing.T) {
@@ -14,12 +16,12 @@ func TestBasicFlow(t *testing.T) {
 		panic(err)
 	}
 
-	// add a higher bid (won't check amount, though)
-
+	// add a higher bid (db funcs won't check amount, though)
 	if err := BidDB.AddBid("0", &types.Bid{Owner: "cosmos456", Amount: "200"}); err != nil {
 		panic(err)
 	}
 
+	// check highest bid
 	if bid, err := BidDB.GetHighestBid("0"); err != nil {
 		panic(err)
 	} else {
@@ -27,4 +29,19 @@ func TestBasicFlow(t *testing.T) {
 			panic("Highest auction item not selected")
 		}
 	}
+
+	// clear auction under id 0
+	if err := BidDB.ClearAuction("0"); err != nil {
+		panic(err)
+	} else {
+		// expect auction key to be unknown
+		if err := BidDB.db.View(func(txn *badger.Txn) error {
+			_, err := txn.Get([]byte("0"))
+			return err
+		}); err != nil {
+			if err != badger.ErrKeyNotFound {
+				panic(err)
+			}
+		}
+	}
 }