**STILLBAKING** Decouple disk cache tests from backends.

net/disk_cache/disk_cache_test_base.h

-// Copyright (c) 2012 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 NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_
-#define NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_
-
-#include "base/basictypes.h"
-#include "base/files/file_path.h"
-#include "base/files/scoped_temp_dir.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/thread.h"
-#include "net/base/cache_type.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/platform_test.h"
-
-namespace net {
-
-class IOBuffer;
-
-}  // namespace net
-
-namespace disk_cache {
-
-class Backend;
-class BackendImpl;
-class Entry;
-class MemBackendImpl;
-class SimpleBackendImpl;
-
-}  // namespace disk_cache
-
-// These tests can use the path service, which uses autoreleased objects on the
-// Mac, so this needs to be a PlatformTest.  Even tests that do not require a
-// cache (and that do not need to be a DiskCacheTestWithCache) are susceptible
-// to this problem; all such tests should use TEST_F(DiskCacheTest, ...).
-class DiskCacheTest : public PlatformTest {
- protected:
-  DiskCacheTest();
-  virtual ~DiskCacheTest();
-
-  // Copies a set of cache files from the data folder to the test folder.
-  bool CopyTestCache(const std::string& name);
-
-  // Deletes the contents of |cache_path_|.
-  bool CleanupCacheDir();
-
-  virtual void TearDown() OVERRIDE;
-
-  base::FilePath cache_path_;
-
- private:
-  base::ScopedTempDir temp_dir_;
-  scoped_ptr<base::MessageLoop> message_loop_;
-};
-
-// Provides basic support for cache related tests.
-class DiskCacheTestWithCache : public DiskCacheTest {
- protected:
-  DiskCacheTestWithCache();
-  virtual ~DiskCacheTestWithCache();
-
-  void CreateBackend(uint32 flags, base::Thread* thread);
-
-  void InitCache();
-  void SimulateCrash();
-  void SetTestMode();
-
-  void SetMemoryOnlyMode() {
-    memory_only_ = true;
-  }
-
-  void SetSimpleCacheMode() {
-    simple_cache_mode_ = true;
-  }
-
-  void SetMask(uint32 mask) {
-    mask_ = mask;
-  }
-
-  void SetMaxSize(int size);
-
-  // Deletes and re-creates the files on initialization errors.
-  void SetForceCreation() {
-    force_creation_ = true;
-  }
-
-  void SetNewEviction() {
-    new_eviction_ = true;
-  }
-
-  void DisableSimpleCacheWaitForIndex() {
-    simple_cache_wait_for_index_ = false;
-  }
-
-  void DisableFirstCleanup() {
-    first_cleanup_ = false;
-  }
-
-  void DisableIntegrityCheck() {
-    integrity_ = false;
-  }
-
-  void UseCurrentThread() {
-    use_current_thread_ = true;
-  }
-
-  void SetCacheType(net::CacheType type) {
-    type_ = type;
-  }
-
-  // Utility methods to access the cache and wait for each operation to finish.
-  int OpenEntry(const std::string& key, disk_cache::Entry** entry);
-  int CreateEntry(const std::string& key, disk_cache::Entry** entry);
-  int DoomEntry(const std::string& key);
-  int DoomAllEntries();
-  int DoomEntriesBetween(const base::Time initial_time,
-                         const base::Time end_time);
-  int DoomEntriesSince(const base::Time initial_time);
-  int OpenNextEntry(void** iter, disk_cache::Entry** next_entry);
-  void FlushQueueForTest();
-  void RunTaskForTest(const base::Closure& closure);
-  int ReadData(disk_cache::Entry* entry, int index, int offset,
-               net::IOBuffer* buf, int len);
-  int WriteData(disk_cache::Entry* entry, int index, int offset,
-                net::IOBuffer* buf, int len, bool truncate);
-  int ReadSparseData(disk_cache::Entry* entry, int64 offset, net::IOBuffer* buf,
-                     int len);
-  int WriteSparseData(disk_cache::Entry* entry, int64 offset,
-                      net::IOBuffer* buf, int len);
-
-  // Asks the cache to trim an entry. If |empty| is true, the whole cache is
-  // deleted.
-  void TrimForTest(bool empty);
-
-  // Asks the cache to trim an entry from the deleted list. If |empty| is
-  // true, the whole list is deleted.
-  void TrimDeletedListForTest(bool empty);
-
-  // Makes sure that some time passes before continuing the test. Time::Now()
-  // before and after this method will not be the same.
-  void AddDelay();
-
-  // DiskCacheTest:
-  virtual void TearDown() OVERRIDE;
-
-  // cache_ will always have a valid object, regardless of how the cache was
-  // initialized. The implementation pointers can be NULL.
-  scoped_ptr<disk_cache::Backend> cache_;
-  disk_cache::BackendImpl* cache_impl_;
-  disk_cache::SimpleBackendImpl* simple_cache_impl_;
-  disk_cache::MemBackendImpl* mem_cache_;
-
-  uint32 mask_;
-  int size_;
-  net::CacheType type_;
-  bool memory_only_;
-  bool simple_cache_mode_;
-  bool simple_cache_wait_for_index_;
-  bool force_creation_;
-  bool new_eviction_;
-  bool first_cleanup_;
-  bool integrity_;
-  bool use_current_thread_;
-  // This is intentionally left uninitialized, to be used by any test.
-  bool success_;
-
- private:
-  void InitMemoryCache();
-  void InitDiskCache();
-
-  base::Thread cache_thread_;
-  DISALLOW_COPY_AND_ASSIGN(DiskCacheTestWithCache);
-};
-
-#endif  // NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_