Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_directory_database_unittest.cc

 // Copyright (c) 2011 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 "webkit/fileapi/file_system_directory_database.h"
 
 #include <math.h>
 
+#include "base/platform_file.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace fileapi {
 
+namespace {
+const FilePath::CharType kDirectoryDatabaseName[] = FILE_PATH_LITERAL("Paths");
+}
+
 class FileSystemDirectoryDatabaseTest : public testing::Test {
  public:
   typedef FileSystemDirectoryDatabase::FileId FileId;
   typedef FileSystemDirectoryDatabase::FileInfo FileInfo;
 
   FileSystemDirectoryDatabaseTest() {
     EXPECT_TRUE(base_.CreateUniqueTempDir());
     InitDatabase();
   }
 
   FileSystemDirectoryDatabase* db() {
     return db_.get();
   }
 
   void InitDatabase() {
+    CloseDatabase();
+    db_.reset(new FileSystemDirectoryDatabase(sandbox_path()));
+  }
+
+  void CloseDatabase() {
     db_.reset();
-    FilePath path = base_.path().AppendASCII("db");
-    db_.reset(new FileSystemDirectoryDatabase(path));
   }
 
   bool AddFileInfo(FileId parent_id, const FilePath::StringType& name) {
     FileId file_id;
     FileInfo info;
     info.parent_id = parent_id;
     info.name = name;
     return db_->AddFileInfo(info, &file_id);
   }
 
+  FilePath sandbox_path() const {
+    return base_.path();
+  }
+
  protected:
   // Common temp base for nondestructive uses.
   ScopedTempDir base_;
   scoped_ptr<FileSystemDirectoryDatabase> db_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemDirectoryDatabaseTest);
 };
 
 TEST_F(FileSystemDirectoryDatabaseTest, TestMissingFileGetInfo) {
   FileId file_id = 888;
@@ skipping 355 matching lines @@
   InitDatabase();
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(2, next);
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(3, next);
   InitDatabase();
   EXPECT_TRUE(db()->GetNextInteger(&next));
   EXPECT_EQ(4, next);
 }
 
+TEST_F(FileSystemDirectoryDatabaseTest, TestDatabaseRecovery) {
+  int64 next = -1;
+  EXPECT_TRUE(db()->GetNextInteger(&next));
+  EXPECT_EQ(0, next);
+  InitDatabase();
+  EXPECT_TRUE(db()->GetNextInteger(&next));
+  EXPECT_EQ(1, next);
+  CloseDatabase();
+
+  bool created = false;
+  base::PlatformFileError error = base::PLATFORM_FILE_ERROR_FAILED;
+  base::PlatformFile file = base::CreatePlatformFile(
+      sandbox_path().Append(kDirectoryDatabaseName).AppendASCII("CURRENT"),
+      base::PLATFORM_FILE_CREATE_ALWAYS | base::PLATFORM_FILE_WRITE,
+      &created, &error);
+  EXPECT_EQ(base::PLATFORM_FILE_OK, error);
+  EXPECT_TRUE(created);
+  EXPECT_TRUE(base::ClosePlatformFile(file));
+
+  InitDatabase();
+  EXPECT_TRUE(db()->GetNextInteger(&next));
+  EXPECT_EQ(0, next);
+}
+
 }  // namespace fileapi