Add a integration test suite for BlobChannel.

blimp/common/blob_cache/id_util.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "blimp/common/blob_cache/id_util.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "blimp/common/blob_cache/blob_cache.h"
 #include "crypto/sha2.h"
 
 namespace blimp {
 
 const BlobId CalculateBlobId(const void* data, size_t data_size) {
   return crypto::SHA256HashString(
       base::StringPiece(reinterpret_cast<const char*>(data), data_size));
 }
 
+const BlobId CalculateBlobId(const std::string& data) {
+  return crypto::SHA256HashString(data);
+}
+
 const std::string BlobIdToString(const BlobId& id) {
-  DCHECK(IsValidBlobId(id));
+  DCHECK(IsValidBlobId(id)) << "Invalid blob ID: " << id;
   return base::ToLowerASCII(base::HexEncode(id.data(), id.length()));
 }
 
 bool IsValidBlobId(const BlobId& id) {
   return crypto::kSHA256Length == id.length();
 }
 
 }  // namespace blimp