1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SQL_TEST_TEST_HELPERS_H_ 6 #define SQL_TEST_TEST_HELPERS_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/compiler_specific.h" 12 #include "base/files/file_path.h" 13 14 // Collection of test-only convenience functions. 15 16 namespace base { 17 class FilePath; 18 } 19 20 namespace sql { 21 class Connection; 22 } 23 24 namespace sql { 25 namespace test { 26 27 // SQLite stores the database size in the header, and if the actual 28 // OS-derived size is smaller, the database is considered corrupt. 29 // [This case is actually a common form of corruption in the wild.] 30 // This helper sets the in-header size to one page larger than the 31 // actual file size. The resulting file will return SQLITE_CORRUPT 32 // for most operations unless PRAGMA writable_schema is turned ON. 33 // 34 // Returns false if any error occurs accessing the file. 35 bool CorruptSizeInHeader(const base::FilePath& db_path) WARN_UNUSED_RESULT; 36 37 // Frequently corruption is a result of failure to atomically update 38 // pages in different structures. For instance, if an index update 39 // takes effect but the corresponding table update does not. This 40 // helper restores the prior version of a b-tree root after running an 41 // update which changed that b-tree. The named b-tree must exist and 42 // must be a leaf node (either index or table). Returns true if the 43 // on-disk file is successfully modified, and the restored page 44 // differs from the updated page. 45 // 46 // The resulting database should be possible to open, and many 47 // statements should work. SQLITE_CORRUPT will be thrown if a query 48 // through the index finds the row missing in the table. 49 // 50 // TODO(shess): It would be very helpful to allow a parameter to the 51 // sql statement. Perhaps a version with a string parameter would be 52 // sufficient, given affinity rules? 53 bool CorruptTableOrIndex(const base::FilePath& db_path, 54 const char* tree_name, 55 const char* update_sql) WARN_UNUSED_RESULT; 56 57 // Return the number of tables in sqlite_master. 58 size_t CountSQLTables(sql::Connection* db) WARN_UNUSED_RESULT; 59 60 // Return the number of indices in sqlite_master. 61 size_t CountSQLIndices(sql::Connection* db) WARN_UNUSED_RESULT; 62 63 // Returns the number of columns in the named table. 0 indicates an 64 // error (probably no such table). 65 size_t CountTableColumns(sql::Connection* db, const char* table) 66 WARN_UNUSED_RESULT; 67 68 // Sets |*count| to the number of rows in |table|. Returns false in 69 // case of error, such as the table not existing. 70 bool CountTableRows(sql::Connection* db, const char* table, size_t* count); 71 72 // Creates a SQLite database at |db_path| from the sqlite .dump output 73 // at |sql_path|. Returns false if |db_path| already exists, or if 74 // sql_path does not exist or cannot be read, or if there is an error 75 // executing the statements. 76 bool CreateDatabaseFromSQL(const base::FilePath& db_path, 77 const base::FilePath& sql_path) WARN_UNUSED_RESULT; 78 79 // Return the results of running "PRAGMA integrity_check" on |db|. 80 // TODO(shess): sql::Connection::IntegrityCheck() is basically the 81 // same, but not as convenient for testing. Maybe combine. 82 std::string IntegrityCheck(sql::Connection* db) WARN_UNUSED_RESULT; 83 84 } // namespace test 85 } // namespace sql 86 87 #endif // SQL_TEST_TEST_HELPERS_H_ 88
