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

components/offline_pages/offline_page_test_archiver.h

+// 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.
+
+#ifndef COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_TEST_ARCHIVER_H_
+#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_TEST_ARCHIVER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
+#include "components/offline_pages/offline_page_archiver.h"
+
+class GURL;
+
+namespace base {
+class FilePath;
+}  // namespace
+
+namespace offline_pages {
+
+// A test archiver class, which allows for testing offline pages without a need
+// for an actual web contents.
+class OfflinePageTestArchiver : public OfflinePageArchiver {
+ public:
+  class Observer {
+   public:
+    virtual ~Observer() {}
+    virtual void SetLastPathCreatedByArchiver(
+        const base::FilePath& file_path) = 0;
+  };
+
+  OfflinePageTestArchiver(
+      Observer* observer,
+      const GURL& url,
+      ArchiverResult result,
+      int64 size_to_report,
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+  ~OfflinePageTestArchiver() override;
+
+  // OfflinePageArchiver implementation:
+  void CreateArchive(const base::FilePath& archives_dir,
+                     const CreateArchiveCallback& callback) override;
+
+  // Completes the creation of archive. Should be used with |set_delayed| set to
+  // ture.
+  void CompleteCreateArchive();
+
+  // When set to true, |CompleteCreateArchive| should be called explicitly for
+  // the process to finish.
+  void set_delayed(bool delayed) { delayed_ = delayed; }
+
+  bool create_archive_called() const { return create_archive_called_; }
+
+ private:
+  // Not owned. Outlives OfflinePageTestArchiver.
+  Observer* observer_;
+  GURL url_;
+  base::FilePath archives_dir_;
+  ArchiverResult result_;
+  int64 size_to_report_;
+  bool create_archive_called_;
+  bool delayed_;
+  CreateArchiveCallback callback_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(OfflinePageTestArchiver);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_TEST_ARCHIVER_H_