Sync update_engine from chromiumos/platform2.

The update_engine project was synced from chromium gerrit instance with
the latest changes.You can find the old version here:
https://chromium.googlesource.com/chromiumos/platform2/+/830d80acf26c8232d4b6e14916b7dad543bcf5ec/update_engine

BUG=b/23084607

1 files changed, 47 insertions, 0 deletions

diff --git a/payload_generator/blob_file_writer_unittest.cc b/payload_generator/blob_file_writer_unittest.cc
new file mode 100644
index 00000000..c845f971
--- /dev/null
+++ b/payload_generator/blob_file_writer_unittest.cc
@@ -0,0 +1,47 @@
+// Copyright 2015 The Chromium OS 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 "update_engine/payload_generator/blob_file_writer.h"
+
+#include <string>
+
+#include <gtest/gtest.h>
+
+#include "update_engine/test_utils.h"
+#include "update_engine/utils.h"
+
+using chromeos_update_engine::test_utils::FillWithData;
+using std::string;
+
+namespace chromeos_update_engine {
+
+class BlobFileWriterTest : public ::testing::Test {};
+
+TEST(BlobFileWriterTest, SimpleTest) {
+  string blob_path;
+  int blob_fd;
+  EXPECT_TRUE(utils::MakeTempFile("BlobFileWriterTest.XXXXXX",
+                                  &blob_path,
+                                  &blob_fd));
+  off_t blob_file_size = 0;
+  BlobFileWriter blob_file(blob_fd, &blob_file_size);
+
+  off_t blob_size = 1024;
+  chromeos::Blob blob(blob_size);
+  FillWithData(&blob);
+  EXPECT_EQ(0, blob_file.StoreBlob(blob));
+  EXPECT_EQ(blob_size, blob_file.StoreBlob(blob));
+
+  chromeos::Blob stored_blob(blob_size);
+  ssize_t bytes_read;
+  ASSERT_TRUE(utils::PReadAll(blob_fd,
+                              stored_blob.data(),
+                              blob_size,
+                              0,
+                              &bytes_read));
+  EXPECT_EQ(bytes_read, blob_size);
+  EXPECT_EQ(blob, stored_blob);
+}
+
+}  // namespace chromeos_update_engine