kvdb: move channeldb/kvdb to top level

kvdb/etcd/driver_test.go

@@ -0,0 +1,30 @@
+// +build kvdb_etcd
+
+package etcd
+
+import (
+	"testing"
+
+	"github.com/btcsuite/btcwallet/walletdb"
+	"github.com/stretchr/testify/require"
+)
+
+func TestOpenCreateFailure(t *testing.T) {
+	t.Parallel()
+
+	db, err := walletdb.Open(dbType)
+	require.Error(t, err)
+	require.Nil(t, db)
+
+	db, err = walletdb.Open(dbType, "wrong")
+	require.Error(t, err)
+	require.Nil(t, db)
+
+	db, err = walletdb.Create(dbType)
+	require.Error(t, err)
+	require.Nil(t, db)
+
+	db, err = walletdb.Create(dbType, "wrong")
+	require.Error(t, err)
+	require.Nil(t, db)
+}