Update vendored library cloud.google.com/go

vendor/cloud.google.com/go/spanner/batch_test.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2018 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package spanner
+
+import (
+	"testing"
+	"time"
+
+	sppb "google.golang.org/genproto/googleapis/spanner/v1"
+)
+
+func TestPartitionRoundTrip(t *testing.T) {
+	t.Parallel()
+	for i, want := range []Partition{
+		{rreq: &sppb.ReadRequest{Table: "t"}},
+		{qreq: &sppb.ExecuteSqlRequest{Sql: "sql"}},
+	} {
+		got := serdesPartition(t, i, &want)
+		if !testEqual(got, want) {
+			t.Errorf("got: %#v\nwant:%#v", got, want)
+		}
+	}
+}
+
+func TestBROTIDRoundTrip(t *testing.T) {
+	t.Parallel()
+	tm := time.Now()
+	want := BatchReadOnlyTransactionID{
+		tid: []byte("tid"),
+		sid: "sid",
+		rts: tm,
+	}
+	data, err := want.MarshalBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+	var got BatchReadOnlyTransactionID
+	if err := got.UnmarshalBinary(data); err != nil {
+		t.Fatal(err)
+	}
+	if !testEqual(got, want) {
+		t.Errorf("got: %#v\nwant:%#v", got, want)
+	}
+}
+
+// serdesPartition is a helper that serialize a Partition then deserialize it
+func serdesPartition(t *testing.T, i int, p1 *Partition) (p2 Partition) {
+	var (
+		data []byte
+		err  error
+	)
+	if data, err = p1.MarshalBinary(); err != nil {
+		t.Fatalf("#%d: encoding failed %v", i, err)
+	}
+	if err = p2.UnmarshalBinary(data); err != nil {
+		t.Fatalf("#%d: decoding failed %v", i, err)
+	}
+	return p2
+}