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
84 lines
2.1 KiB
Plaintext
84 lines
2.1 KiB
Plaintext
# 2007 Sept 7
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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: corrupt4.test,v 1.1 2007/09/07 14:32:07 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Do not use a codec for tests in this file, as the database file is
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# manipulated directly using tcl scripts (using the [hexio_write] command).
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#
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do_not_use_codec
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# These tests deal with corrupt database files
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#
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database_may_be_corrupt
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# We must have the page_size pragma for these tests to work.
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#
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ifcapable !pager_pragmas {
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finish_test
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return
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}
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# Create a database with a freelist containing at least two pages.
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#
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do_test corrupt4-1.1 {
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set bigstring [string repeat 0123456789 200]
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execsql {
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PRAGMA auto_vacuum=OFF;
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PRAGMA page_size=1024;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES($bigstring);
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CREATE TABLE t2(y);
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INSERT INTO t2 VALUES(1);
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DROP TABLE t1;
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}
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file size test.db
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} [expr {1024*4}]
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# Verify that there are two pages on the freelist.
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#
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do_test corrupt4-1.2 {
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execsql {PRAGMA freelist_count}
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} {2}
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# Get the page number for the trunk of the freelist.
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#
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set trunkpgno [hexio_get_int [hexio_read test.db 32 4]]
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set baseaddr [expr {($trunkpgno-1)*1024}]
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# Verify that the trunk of the freelist has exactly one
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# leaf.
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#
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do_test corrupt4-1.3 {
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hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4]
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} {1}
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# Insert a negative number as the number of leaves on the trunk.
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# Then try to add a new element to the freelist.
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#
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do_test corrupt4-1.4 {
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hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000]
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db close
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sqlite3 db test.db
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catchsql {
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DROP TABLE t2
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}
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} {1 {database disk image is malformed}}
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finish_test
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