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