[Offline pages] Refactoring helper classes out from offline_page_model_unittest.cc

components/offline_pages/offline_page_test_archiver.cc

+// Copyright 2015 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 "components/offline_pages/offline_page_test_archiver.h"
+
+#include "base/bind.h"
+#include "base/files/file_util.h"
+#include "base/location.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace offline_pages {
+
+OfflinePageTestArchiver::OfflinePageTestArchiver(
+    Observer* observer,
+    const GURL& url,
+    ArchiverResult result,
+    int64 size_to_report,
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : observer_(observer),
+      url_(url),
+      result_(result),
+      size_to_report_(size_to_report),
+      create_archive_called_(false),
+      delayed_(false),
+      task_runner_(task_runner) {}
+
+OfflinePageTestArchiver::~OfflinePageTestArchiver() {
+  EXPECT_TRUE(create_archive_called_);
+}
+
+void OfflinePageTestArchiver::CreateArchive(
+    const base::FilePath& archives_dir,
+    const CreateArchiveCallback& callback) {
+  create_archive_called_ = true;
+  callback_ = callback;
+  archives_dir_ = archives_dir;
+  if (!delayed_)
+    CompleteCreateArchive();
+}
+
+void OfflinePageTestArchiver::CompleteCreateArchive() {
+  DCHECK(!callback_.is_null());
+  base::FilePath archive_path;
+  ASSERT_TRUE(base::CreateTemporaryFileInDir(archives_dir_, &archive_path));
+  observer_->SetLastPathCreatedByArchiver(archive_path);
+  task_runner_->PostTask(FROM_HERE, base::Bind(callback_, this, result_, url_,
+                                               archive_path, size_to_report_));
+}
+
+}  // namespace offline_pages