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# 2008 January 8
#
# 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 contains additional tests to verify that SQLite database
# file survive a power loss or OS crash.
#
# $Id: crash4.test,v 1.3 2008/01/16 17:46:38 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !crashtest {
finish_test
return
}
# A sequence of SQL commands:
#
set sql_cmd_list {
{CREATE TABLE a(id INTEGER, name CHAR(50))}
{INSERT INTO a(id,name) VALUES(1,'one')}
{INSERT INTO a(id,name) VALUES(2,'two')}
{INSERT INTO a(id,name) VALUES(3,'three')}
{INSERT INTO a(id,name) VALUES(4,'four')}
{INSERT INTO a(id,name) VALUES(5,'five')}
{INSERT INTO a(id,name) VALUES(6,'six')}
{INSERT INTO a(id,name) VALUES(7,'seven')}
{INSERT INTO a(id,name) VALUES(8,'eight')}
{INSERT INTO a(id,name) VALUES(9,'nine')}
{INSERT INTO a(id,name) VALUES(10,'ten')}
{UPDATE A SET name='new text for row 3' WHERE id=3}
}
# Assume that a database is created by evaluating the SQL statements
# in $sql_cmd_list. Compute a set of checksums that capture the state
# of the database after each statement. Also include a checksum for
# the state of the database prior to any of these statements.
#
set crash4_cksum_set {}
lappend crash4_cksum_set [allcksum db]
foreach cmd $sql_cmd_list {
db eval $cmd
lappend crash4_cksum_set [allcksum db]
}
# Run the sequence of SQL statements shown above repeatedly.
# Close and reopen the database right before the UPDATE statement.
# On each repetition, introduce database corruption typical of
# what might be seen in a power loss or OS crash.
#
# Slowly increase the delay before the crash, repeating the test
# over and over. Stop testing when the entire sequence of SQL
# statements runs to completing without hitting the crash.
#
for {set cnt 1; set fin 0} {!$fin} {incr cnt} {
db close
forcedelete test.db test.db-journal
do_test crash4-1.$cnt.1 {
set seed [expr {int(abs(rand()*10000))}]
set delay [expr {int($cnt/50)+1}]
set file [expr {($cnt&1)?"test.db":"test.db-journal"}]
set c [crashsql -delay $delay -file $file -seed $seed -tclbody {
db eval {CREATE TABLE a(id INTEGER, name CHAR(50))}
db eval {INSERT INTO a(id,name) VALUES(1,'one')}
db eval {INSERT INTO a(id,name) VALUES(2,'two')}
db eval {INSERT INTO a(id,name) VALUES(3,'three')}
db eval {INSERT INTO a(id,name) VALUES(4,'four')}
db eval {INSERT INTO a(id,name) VALUES(5,'five')}
db eval {INSERT INTO a(id,name) VALUES(6,'six')}
db eval {INSERT INTO a(id,name) VALUES(7,'seven')}
db eval {INSERT INTO a(id,name) VALUES(8,'eight')}
db eval {INSERT INTO a(id,name) VALUES(9,'nine')}
db eval {INSERT INTO a(id,name) VALUES(10,'ten')}
db close
sqlite3 db test.db
db eval {UPDATE A SET name='new text for row 3' WHERE id=3}
db close
} {}]
if {$c==[list 0 {}]} {
set ::fin 1
set c [list 1 {child process exited abnormally}]
}
set c
} {1 {child process exited abnormally}}
sqlite3 db test.db
integrity_check crash4-1.$cnt.2
do_test crash4-1.$cnt.3 {
set x [lsearch $::crash4_cksum_set [allcksum db]]
expr {$x>=0}
} {1}
}
finish_test
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