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Annotation of embedaddon/sqlite3/test/corrupt4.test, revision 1.1.1.1

1.1       misho       1: # 2007 Sept 7
                      2: #
                      3: # The author disclaims copyright to this source code.  In place of
                      4: # a legal notice, here is a blessing:
                      5: #
                      6: #    May you do good and not evil.
                      7: #    May you find forgiveness for yourself and forgive others.
                      8: #    May you share freely, never taking more than you give.
                      9: #
                     10: #***********************************************************************
                     11: # This file implements regression tests for SQLite library.
                     12: #
                     13: # This file implements tests to make sure SQLite does not crash or
                     14: # segfault if it sees a corrupt database file.
                     15: #
                     16: # $Id: corrupt4.test,v 1.1 2007/09/07 14:32:07 drh Exp $
                     17: 
                     18: set testdir [file dirname $argv0]
                     19: source $testdir/tester.tcl
                     20: 
                     21: # Do not use a codec for tests in this file, as the database file is
                     22: # manipulated directly using tcl scripts (using the [hexio_write] command).
                     23: #
                     24: do_not_use_codec
                     25: 
                     26: # We must have the page_size pragma for these tests to work.
                     27: #
                     28: ifcapable !pager_pragmas {
                     29:   finish_test
                     30:   return
                     31: }
                     32: 
                     33: # Create a database with a freelist containing at least two pages.
                     34: #
                     35: do_test corrupt4-1.1 {
                     36:   set bigstring [string repeat 0123456789 200]
                     37:   execsql {
                     38:     PRAGMA auto_vacuum=OFF;
                     39:     PRAGMA page_size=1024;
                     40:     CREATE TABLE t1(x);
                     41:     INSERT INTO t1 VALUES($bigstring);
                     42:     CREATE TABLE t2(y);
                     43:     INSERT INTO t2 VALUES(1);
                     44:     DROP TABLE t1;
                     45:   }
                     46:   file size test.db
                     47: } [expr {1024*4}]
                     48: 
                     49: # Verify that there are two pages on the freelist.
                     50: #
                     51: do_test corrupt4-1.2 {
                     52:   execsql {PRAGMA freelist_count}
                     53: } {2}
                     54: 
                     55: # Get the page number for the trunk of the freelist.
                     56: #
                     57: set trunkpgno [hexio_get_int [hexio_read test.db 32 4]]
                     58: set baseaddr [expr {($trunkpgno-1)*1024}]
                     59: 
                     60: # Verify that the trunk of the freelist has exactly one
                     61: # leaf.
                     62: #
                     63: do_test corrupt4-1.3 {
                     64:   hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4]
                     65: } {1}
                     66: 
                     67: # Insert a negative number as the number of leaves on the trunk.
                     68: # Then try to add a new element to the freelist.
                     69: #
                     70: do_test corrupt4-1.4 {
                     71:   hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000]
                     72:   db close
                     73:   sqlite3 db test.db
                     74:   catchsql {
                     75:     DROP TABLE t2
                     76:   }
                     77: } {1 {database disk image is malformed}}
                     78: 
                     79: finish_test