1# 2001 September 15 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 6# May you do good and not evil. 7# May you find forgiveness for yourself and forgive others. 8# May you share freely, never taking more than you give. 9# 10#*********************************************************************** 11# This file implements regression tests for SQLite library. The 12# focus of this script is database locks and the operation of the 13# DEFERRED, IMMEDIATE, and EXCLUSIVE keywords as modifiers to the 14# BEGIN command. 15# 16# $Id: lock3.test,v 1.4 2009/03/28 15:04:24 drh Exp $ 17 18 19set testdir [file dirname $argv0] 20source $testdir/tester.tcl 21 22# Establish two connections to the same database. Put some 23# sample data into the database. 24# 25do_test lock3-1.1 { 26 file mkdir tempdir/t1/t2/t3 27 sqlite3 db2 ./tempdir/t1//t2/./t3//./../..//./../../tempdir/..//test.db// 28 execsql { 29 CREATE TABLE t1(a); 30 INSERT INTO t1 VALUES(1); 31 } 32 execsql { 33 SELECT * FROM t1 34 } db2 35} 1 36 37# Get a deferred lock on the database using one connection. The 38# other connection should still be able to write. 39# 40do_test lock3-2.1 { 41 execsql {BEGIN DEFERRED TRANSACTION} 42 execsql {INSERT INTO t1 VALUES(2)} db2 43 execsql {END TRANSACTION} 44 execsql {SELECT * FROM t1} 45} {1 2} 46 47# Get an immediate lock on the database using one connection. The 48# other connection should be able to read the database but not write 49# it. 50# 51do_test lock3-3.1 { 52 execsql {BEGIN IMMEDIATE TRANSACTION} 53 catchsql {SELECT * FROM t1} db2 54} {0 {1 2}} 55do_test lock3-3.2 { 56 catchsql {INSERT INTO t1 VALUES(3)} db2 57} {1 {database is locked}} 58do_test lock3-3.3 { 59 execsql {END TRANSACTION} 60} {} 61 62 63# Get an exclusive lock on the database using one connection. The 64# other connection should be unable to read or write the database. 65# 66do_test lock3-4.1 { 67 execsql {BEGIN EXCLUSIVE TRANSACTION} 68 catchsql {SELECT * FROM t1} db2 69} {1 {database is locked}} 70do_test lock3-4.2 { 71 catchsql {INSERT INTO t1 VALUES(3)} db2 72} {1 {database is locked}} 73do_test lock3-4.3 { 74 execsql {END TRANSACTION} 75} {} 76 77catch {db2 close} 78 79finish_test 80