09fe614372
always well-formed. Use this during testing to enable assert() statements that prove conditions that are always true for well-formed databases. FossilOrigin-Name: 15e4f63d1f3cbcd0aa789fd3e460cd6e4d3338f9
119 lines
3.1 KiB
Plaintext
119 lines
3.1 KiB
Plaintext
# 2007 April 6
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library.
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#
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# This file implements tests to make sure SQLite does not crash or
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# segfault if it sees a corrupt database file.
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#
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# $Id: corrupt3.test,v 1.2 2007/04/06 21:42:22 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Do not use a codec for tests in this file, as the database file is
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# manipulated directly using tcl scripts (using the [hexio_write] command).
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#
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do_not_use_codec
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# These tests deal with corrupt database files
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#
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database_may_be_corrupt
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# We must have the page_size pragma for these tests to work.
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#
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ifcapable !pager_pragmas||direct_read {
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finish_test
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return
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}
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# Create a database with an overflow page.
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#
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do_test corrupt3-1.1 {
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set bigstring [string repeat 0123456789 200]
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execsql {
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PRAGMA auto_vacuum=OFF;
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PRAGMA page_size=1024;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES($bigstring);
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}
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file size test.db
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} [expr {1024*3}]
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# Verify that the file format is as we expect. The page size
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# should be 1024 bytes. The only record should have a single
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# overflow page. The overflow page is page 3. The pointer to
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# the overflow page is on the last 4 bytes of page 2.
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#
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do_test corrupt3-1.2 {
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hexio_get_int [hexio_read test.db 16 2]
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} 1024 ;# The page size is 1024
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do_test corrupt3-1.3 {
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hexio_get_int [hexio_read test.db 20 1]
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} 0 ;# Unused bytes per page is 0
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do_test corrupt3-1.4 {
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hexio_get_int [hexio_read test.db 2044 4]
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} 3 ;# Overflow page is 3
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do_test corrupt3-1.5 {
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hexio_get_int [hexio_read test.db 2048 4]
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} 0 ;# First chained overflow is 0
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integrity_check corrupt3-1.6
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# Make the overflow chain loop back on itself. See if the
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# corruption is detected. (Actually, the last pointer in
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# an overflow chain is ignored, so this is not an error.)
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#
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do_test corrupt3-1.7 {
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db close
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hexio_write test.db 2048 [hexio_render_int32 3]
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sqlite3 db test.db
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catchsql {
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SELECT x FROM t1
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}
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} [list 0 $bigstring]
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integrity_check corrupt3-1.8
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# Change the pointer for the first page of the overflow
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# change to be a non-existant page.
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#
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do_test corrupt3-1.9 {
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db close
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hexio_write test.db 2044 [hexio_render_int32 4]
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sqlite3 db test.db
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catchsql {
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SELECT substr(x,1,10) FROM t1
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}
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} [list 0 0123456789]
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do_test corrupt3-1.10 {
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catchsql {
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PRAGMA integrity_check
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}
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} {0 {{*** in database main ***
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On tree page 2 cell 0: invalid page number 4
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Page 3 is never used}}}
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do_test corrupt3-1.11 {
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db close
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hexio_write test.db 2044 [hexio_render_int32 0]
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sqlite3 db test.db
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catchsql {
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SELECT substr(x,1,10) FROM t1
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}
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} [list 1 {database disk image is malformed}]
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do_test corrupt3-1.12 {
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catchsql {
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PRAGMA integrity_check
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}
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} {0 {{*** in database main ***
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On tree page 2 cell 0: 1 of 1 pages missing from overflow list starting at 0
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Page 3 is never used}}}
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finish_test
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