unit test for new memdb bids getter

x/cosmostest/memdb/biddb_test.go

@@ -2,6 +2,7 @@ package memdb
 
 import (
 	"cosmos-test/x/cosmostest/types"
+	"fmt"
 	"testing"
 
 	"github.com/dgraph-io/badger/v3"
@@ -21,6 +22,18 @@ func TestBasicFlow(t *testing.T) {
 		panic(err)
 	}
 
+	// get all bids out
+	if bids, err := BidDB.GetBids("0"); err != nil {
+		panic(err)
+	} else {
+		if bids == nil {
+			panic("GetBids(0) should should not return nil")
+		}
+		if len(bids) != 2 {
+			panic(fmt.Sprintf("Length of GetBids(0) should be 2, instead got %d", len(bids)))
+		}
+	}
+
 	// check highest bid
 	if bid, err := BidDB.GetHighestBid("0"); err != nil {
 		panic(err)