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# 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 script is database locks and the operation of the
# DEFERRED, IMMEDIATE, and EXCLUSIVE keywords as modifiers to the
# BEGIN command.
#
# $Id: lock3.test,v 1.4 2009/03/28 15:04:24 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Establish two connections to the same database. Put some
# sample data into the database.
#
do_test lock3-1.1 {
file mkdir tempdir/t1/t2/t3
sqlite3 db2 ./tempdir/t1//t2/./t3//./../..//./../../tempdir/..//test.db//
execsql {
CREATE TABLE t1(a);
INSERT INTO t1 VALUES(1);
}
execsql {
SELECT * FROM t1
} db2
} 1
# Get a deferred lock on the database using one connection. The
# other connection should still be able to write.
#
do_test lock3-2.1 {
execsql {BEGIN DEFERRED TRANSACTION}
execsql {INSERT INTO t1 VALUES(2)} db2
execsql {END TRANSACTION}
execsql {SELECT * FROM t1}
} {1 2}
# Get an immediate lock on the database using one connection. The
# other connection should be able to read the database but not write
# it.
#
do_test lock3-3.1 {
execsql {BEGIN IMMEDIATE TRANSACTION}
catchsql {SELECT * FROM t1} db2
} {0 {1 2}}
do_test lock3-3.2 {
catchsql {INSERT INTO t1 VALUES(3)} db2
} {1 {database is locked}}
do_test lock3-3.3 {
execsql {END TRANSACTION}
} {}
# Get an exclusive lock on the database using one connection. The
# other connection should be unable to read or write the database.
#
do_test lock3-4.1 {
execsql {BEGIN EXCLUSIVE TRANSACTION}
catchsql {SELECT * FROM t1} db2
} {1 {database is locked}}
do_test lock3-4.2 {
catchsql {INSERT INTO t1 VALUES(3)} db2
} {1 {database is locked}}
do_test lock3-4.3 {
execsql {END TRANSACTION}
} {}
catch {db2 close}
finish_test
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