sqlite/test/walslow.test

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# 2010 March 17
#
# 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 operation of the library in
# "PRAGMA journal_mode=WAL" mode. The tests in this file use
# brute force methods, so may take a while to run.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !wal {finish_test ; return }
proc reopen_db {} {
catch { db close }
file delete -force test.db test.db-wal
sqlite3 db test.db
execsql { PRAGMA journal_mode = wal }
}
db close
save_prng_state
for {set seed 1} {$seed<10} {incr seed} {
expr srand($seed)
restore_prng_state
reopen_db
do_test walslow-1.seed=$seed.0 {
execsql { CREATE TABLE t1(a, b) }
execsql { CREATE INDEX i1 ON t1(a) }
execsql { CREATE INDEX i2 ON t1(b) }
} {}
for {set iTest 1} {$iTest < 100} {incr iTest} {
do_test walslow-1.seed=$seed.$iTest.1 {
set w [expr int(rand()*2000)]
set x [expr int(rand()*2000)]
execsql { INSERT INTO t1 VALUES(randomblob($w), randomblob($x)) }
execsql { PRAGMA integrity_check }
} {ok}
do_test walslow-1.seed=$seed.$iTest.2 {
execsql "PRAGMA wal_checkpoint;"
execsql { PRAGMA integrity_check }
} {ok}
do_test walslow-1.seed=$seed.$iTest.3 {
file delete -force testX.db testX.db-wal
file copy test.db testX.db
file copy test.db-wal testX.db-wal
sqlite3 db2 testX.db
execsql { PRAGMA journal_mode = WAL } db2
execsql { PRAGMA integrity_check } db2
} {ok}
do_test walslow-1.seed=$seed.$iTest.4 {
execsql { SELECT count(*) FROM t1 WHERE a!=b } db2
} [execsql { SELECT count(*) FROM t1 WHERE a!=b }]
db2 close
}
}
finish_test