# 2001 September 15

#

# 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.

#

# The focus of this file is testing the ability of the database to

# uses its rollback journal to recover intact (no database corruption)

# from a power failure during the middle of a COMMIT. Even more

# specifically, the tests in this file verify this functionality

# for storage mediums with various sector sizes.

#

# $Id: crash2.test,v 1.6 2008/08/25 07:12:29 danielk1977 Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

ifcapable !crashtest {

  finish_test

  return

}

db close

# This test is designed to check that the crash-test infrastructure

# can create files that do not consist of an integer number of

# simulated disk blocks (i.e. 3KB file using 2KB disk blocks).

#

do_test crash2-1.1 {

  crashsql -delay 500 -file test.db -blocksize 2048 {

    PRAGMA auto_vacuum=OFF;

    PRAGMA page_size=1024;

    BEGIN;

    CREATE TABLE abc AS SELECT 1 AS a, 2 AS b, 3 AS c;

    CREATE TABLE def AS SELECT 1 AS d, 2 AS e, 3 AS f;

    COMMIT;

  }

  file size test.db

} {3072}

for {set ii 0} {$ii < 5} {incr ii} {

  # Simple test using the database created above: Create a new

  # table so that page 1 and page 4 are modified. Using a

  # block-size of 2048 and page-size of 1024, this means

  # pages 2 and 3 must also be saved in the journal to avoid

  # risking corruption.

  #

  # The loop is so that this test can be run with a couple

  # of different seeds for the random number generator.

  #

  do_test crash2-1.2.$ii {

    crashsql -file test.db -blocksize 2048 [subst {

      [string repeat {SELECT random();} $ii]

      CREATE TABLE hij(h, i, j);

    }]

    sqlite3 db test.db

    db eval {PRAGMA integrity_check}

  } {ok}

}

proc signature {} {

  return [db eval {SELECT count(*), md5sum(a), md5sum(b), md5sum(c) FROM abc}]

}

# Test case for crashing during journal sync with simulated

# sector-size values from 1024 to 8192.

#

do_test crash2-2.0 {

  execsql BEGIN

  for {set n 0} {$n < 1000} {incr n} {

    execsql "INSERT INTO abc VALUES($n, [expr 2*$n], [expr 3*$n])"

  }

  execsql {

    INSERT INTO abc SELECT * FROM abc;

    INSERT INTO abc SELECT * FROM abc;

    INSERT INTO abc SELECT * FROM abc;

    INSERT INTO abc SELECT * FROM abc;

    INSERT INTO abc SELECT * FROM abc;

  }

  execsql COMMIT

  expr ([file size test.db] / 1024) > 450

} {1}

for {set i 1} {$i < 30} {incr i} {

  set sig [signature]

  set sector [expr 1024 * 1<<($i%4)]

  db close

  do_test crash2-2.$i.1 {

     crashsql -blocksize $sector -delay [expr $i%5 + 1] -file test.db-journal "

       PRAGMA temp_store = memory;

       BEGIN;

       SELECT random() FROM abc LIMIT $i;

       INSERT INTO abc SELECT randstr(10,10), 0, 0 FROM abc WHERE random()%2==0;

       DELETE FROM abc WHERE random()%2!=0;

       COMMIT;

     "

  } {1 {child process exited abnormally}}

  do_test crash2-2.$i.2 {

    sqlite3 db test.db

    signature

  } $sig

} 

# Test case for crashing during database sync with simulated

# sector-size values from 1024 to 8192.

#

for {set i 1} {$i < 10} {incr i} {

  set sig [signature]

  set sector [expr 1024 * 1<<($i%4)]

  db close

  do_test crash2-3.$i.1 {

     crashsql -blocksize $sector -file test.db "

       BEGIN;

       SELECT random() FROM abc LIMIT $i;

       INSERT INTO abc SELECT randstr(10,10), 0, 0 FROM abc WHERE random()%2==0;

       DELETE FROM abc WHERE random()%2!=0;

       COMMIT;

     "

  } {1 {child process exited abnormally}}

  do_test crash2-3.$i.2 {

    sqlite3 db test.db

    signature

  } $sig

} 

finish_test