Differential updates for components.

chrome/browser/component_updater/test/component_patcher_unittest.cc

+// Copyright (c) 2013 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 "base/compiler_specific.h"
+#include "base/file_util.h"
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/path_service.h"
+#include "base/values.h"
+#include "chrome/browser/component_updater/component_patcher.h"
+#include "chrome/browser/component_updater/component_patcher_operation.h"
+#include "chrome/browser/component_updater/component_updater_service.h"
+#include "chrome/browser/component_updater/test/component_patcher_mock.h"
+#include "chrome/browser/component_updater/test/component_patcher_unittest.h"
+#include "chrome/browser/component_updater/test/test_installer.h"
+#include "chrome/common/chrome_paths.h"
+#include "courgette/courgette.h"
+#include "courgette/third_party/bsdiff.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+base::FilePath test_file(const char* file) {
+  base::FilePath path;
+  PathService::Get(chrome::DIR_TEST_DATA, &path);
+  return path.AppendASCII("components").AppendASCII(file);
+}
+
+ComponentPatcherOperationTest::ComponentPatcherOperationTest() {
+  EXPECT_TRUE(unpack_dir_.CreateUniqueTempDir());
+  EXPECT_TRUE(input_dir_.CreateUniqueTempDir());
+  EXPECT_TRUE(installed_dir_.CreateUniqueTempDir());
+  patcher_.reset(new MockComponentPatcher());
+  installer_.reset(new ReadOnlyTestInstaller(installed_dir_.path()));
+}
+
+ComponentPatcherOperationTest::~ComponentPatcherOperationTest() {
+}
+
+ComponentUnpacker::Error MockComponentPatcher::Patch(
+    PatchType patch_type,
+    const base::FilePath& input_file,
+    const base::FilePath& patch_file,
+    const base::FilePath& output_file,
+    int* error) {
+  *error = 0;
+  int exit_code;
+  if (patch_type == kPatchTypeCourgette) {
+    exit_code = courgette::ApplyEnsemblePatch(input_file.value().c_str(),
+                                              patch_file.value().c_str(),
+                                              output_file.value().c_str());
+    if (exit_code == courgette::C_OK)
+      return ComponentUnpacker::kNone;
+    *error = exit_code + kCourgetteErrorOffset;
+  } else if (patch_type == kPatchTypeBsdiff) {
+    exit_code = courgette::ApplyBinaryPatch(input_file,
+                                            patch_file,
+                                            output_file);
+    if (exit_code == courgette::OK)
+      return ComponentUnpacker::kNone;
+    *error = exit_code + kBsdiffErrorOffset;
+  }
+  return ComponentUnpacker::kDeltaOperationFailure;
+}
+
+// Verify that a 'create' delta update operation works correctly.
+TEST_F(ComponentPatcherOperationTest, CheckCreateOperation) {
+  EXPECT_TRUE(file_util::CopyFile(
+      test_file("binary_output.bin"),
+      input_dir_.path().Append(FILE_PATH_LITERAL("binary_output.bin"))));
+
+  scoped_ptr<base::DictionaryValue> command_args(new base::DictionaryValue());
+  command_args->SetString("output", "output.bin");
+  command_args->SetString("sha256", binary_output_hash);
+  command_args->SetString("op", "create");
+  command_args->SetString("patch", "binary_output.bin");
+
+  int error = 0;
+  scoped_ptr<DeltaUpdateOp> op(new DeltaUpdateOpCreate());
+  ComponentUnpacker::Error result = op->Run(command_args.get(),
+                                     input_dir_.path(),
+                                     unpack_dir_.path(),
+                                     patcher_.get(),
+                                     NULL,
+                                     &error);
+
+  EXPECT_EQ(ComponentUnpacker::kNone, result);
+  EXPECT_EQ(0, error);
+  EXPECT_TRUE(file_util::ContentsEqual(
+      unpack_dir_.path().Append(FILE_PATH_LITERAL("output.bin")),
+      test_file("binary_output.bin")));
+}
+
+// Verify that a 'copy' delta update operation works correctly.
+TEST_F(ComponentPatcherOperationTest, CheckCopyOperation) {
+  EXPECT_TRUE(file_util::CopyFile(
+      test_file("binary_output.bin"),
+      installed_dir_.path().Append(FILE_PATH_LITERAL("binary_output.bin"))));
+
+  scoped_ptr<base::DictionaryValue> command_args(new base::DictionaryValue());
+  command_args->SetString("output", "output.bin");
+  command_args->SetString("sha256", binary_output_hash);
+  command_args->SetString("op", "copy");
+  command_args->SetString("input", "binary_output.bin");
+
+  int error = 0;
+  scoped_ptr<DeltaUpdateOp> op(new DeltaUpdateOpCopy());
+  ComponentUnpacker::Error result = op->Run(command_args.get(),
+                                     input_dir_.path(),
+                                     unpack_dir_.path(),
+                                     patcher_.get(),
+                                     installer_.get(),
+                                     &error);
+  EXPECT_EQ(ComponentUnpacker::kNone, result);
+  EXPECT_EQ(0, error);
+  EXPECT_TRUE(file_util::ContentsEqual(
+      unpack_dir_.path().Append(FILE_PATH_LITERAL("output.bin")),
+      test_file("binary_output.bin")));
+}