Split Buffer into WriteBuffer/ReadBuffer.

service/datastore/serialize/serialize_test.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package serialize
 
 import (
         "bytes"
         "fmt"
         "io"
@@ skipping 19 matching lines @@
 
 type dspmapTC struct {
         name  string
         props ds.PropertyMap
 }
 
 func mkKey(appID, namespace string, elems ...interface{}) *ds.Key {
         return ds.MkKeyContext(appID, namespace).MakeKey(elems...)
 }
 
-func mkBuf(data []byte) Buffer {
+func mkBuf(data []byte) WriteBuffer {
         return Invertible(bytes.NewBuffer(data))
 }
 
 // TODO(riannucci): dedup with datastore/key testing file
 func ShouldEqualKey(actual interface{}, expected ...interface{}) string {
         if len(expected) != 1 {
                 return fmt.Sprintf("Assertion requires 1 expected value, got %d", len(expected))
         }
         if actual.(*ds.Key).Equal(expected[0].(*ds.Key)) {
                 return ""
@@ skipping 458 matching lines @@
                                                 "__ancestor__": {
                                                         ToBytes(mp(fakeKey)),
                                                         ToBytes(mp(fakeKey.Parent())),
                                                 },
                                         })
                                 })
                         })
                 })
         })
 }