trie: there's no point in retrieving the metaroot

1 files changed, 33 insertions, 0 deletions

diff --git a/trie/database_test.go b/trie/database_test.go
new file mode 100644
index 000000000..65b65678b
--- /dev/null
+++ b/trie/database_test.go
@@ -0,0 +1,33 @@
+// Copyright 2019 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package trie
+
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/ethdb"
+)
+
+// Tests that the trie database returns a missing trie node error if attempting
+// to retrieve the meta root.
+func TestDatabaseMetarootFetch(t *testing.T) {
+	db := NewDatabase(ethdb.NewMemDatabase())
+	if _, err := db.Node(common.Hash{}); err == nil {
+		t.Fatalf("metaroot retrieval succeeded")
+	}
+}