1 files changed, 126 insertions, 0 deletions
diff --git a/swarm/storage/mru/metadata_test.go b/swarm/storage/mru/metadata_test.go
new file mode 100644
index 000000000..abbac6e3e
--- /dev/null
+++ b/swarm/storage/mru/metadata_test.go
@@ -0,0 +1,126 @@
+// Copyright 2018 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 mru
+
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+func compareByteSliceToExpectedHex(t *testing.T, variableName string, actualValue []byte, expectedHex string) {
+	if hexutil.Encode(actualValue) != expectedHex {
+		t.Fatalf("%s: Expected %s to be %s, got %s", t.Name(), variableName, expectedHex, hexutil.Encode(actualValue))
+	}
+}
+
+func getTestMetadata() *ResourceMetadata {
+	return &ResourceMetadata{
+		Name: "world news report, every hour, on the hour",
+		StartTime: Timestamp{
+			Time: 1528880400,
+		},
+		Frequency: 3600,
+		Owner:     newCharlieSigner().Address(),
+	}
+}
+
+func TestMetadataSerializerDeserializer(t *testing.T) {
+	metadata := *getTestMetadata()
+
+	rootAddr, metaHash, chunkData, err := metadata.serializeAndHash() // creates hashes and marshals, in one go
+	if err != nil {
+		t.Fatal(err)
+	}
+	const expectedRootAddr = "0xfb0ed7efa696bdb0b54cd75554cc3117ffc891454317df7dd6fefad978e2f2fb"
+	const expectedMetaHash = "0xf74a10ce8f26ffc8bfaa07c3031a34b2c61f517955e7deb1592daccf96c69cf0"
+	const expectedChunkData = "0x00004f0010dd205b00000000100e0000000000002a776f726c64206e657773207265706f72742c20657665727920686f75722c206f6e2074686520686f7572876a8936a7cd0b79ef0735ad0896c1afe278781c"
+
+	compareByteSliceToExpectedHex(t, "rootAddr", rootAddr, expectedRootAddr)
+	compareByteSliceToExpectedHex(t, "metaHash", metaHash, expectedMetaHash)
+	compareByteSliceToExpectedHex(t, "chunkData", chunkData, expectedChunkData)
+
+	recoveredMetadata := ResourceMetadata{}
+	recoveredMetadata.binaryGet(chunkData)
+
+	if recoveredMetadata != metadata {
+		t.Fatalf("Expected that the recovered metadata equals the marshalled metadata")
+	}
+
+	// we are going to mess with the data, so create a backup to go back to it for the next test
+	backup := make([]byte, len(chunkData))
+	copy(backup, chunkData)
+
+	chunkData = []byte{1, 2, 3}
+	if err := recoveredMetadata.binaryGet(chunkData); err == nil {
+		t.Fatal("Expected binaryGet to fail since chunk is too small")
+	}
+
+	// restore backup
+	chunkData = make([]byte, len(backup))
+	copy(chunkData, backup)
+
+	// mess with the prefix so it is not zero
+	chunkData[0] = 7
+	chunkData[1] = 9
+
+	if err := recoveredMetadata.binaryGet(chunkData); err == nil {
+		t.Fatal("Expected binaryGet to fail since prefix bytes are not zero")
+	}
+
+	// restore backup
+	chunkData = make([]byte, len(backup))
+	copy(chunkData, backup)
+
+	// mess with the length header to trigger an error
+	chunkData[2] = 255
+	chunkData[3] = 44
+	if err := recoveredMetadata.binaryGet(chunkData); err == nil {
+		t.Fatal("Expected binaryGet to fail since header length does not match")
+	}
+
+	// restore backup
+	chunkData = make([]byte, len(backup))
+	copy(chunkData, backup)
+
+	// mess with name length header to trigger a chunk too short error
+	chunkData[20] = 255
+	if err := recoveredMetadata.binaryGet(chunkData); err == nil {
+		t.Fatal("Expected binaryGet to fail since name length is incorrect")
+	}
+
+	// restore backup
+	chunkData = make([]byte, len(backup))
+	copy(chunkData, backup)
+
+	// mess with name length header to trigger an leftover bytes to read error
+	chunkData[20] = 3
+	if err := recoveredMetadata.binaryGet(chunkData); err == nil {
+		t.Fatal("Expected binaryGet to fail since name length is too small")
+	}
+}
+
+func TestMetadataSerializerLengthCheck(t *testing.T) {
+	metadata := *getTestMetadata()
+
+	// make a slice that is too small to contain the metadata
+	serializedMetadata := make([]byte, 4)
+
+	if err := metadata.binaryPut(serializedMetadata); err == nil {
+		t.Fatal("Expected metadata.binaryPut to fail, since target slice is too small")
+	}
+
+}