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 19 set testdir [file dirname $argv0] 20 source $testdir/tester.tcl 21 22 # Establish two connections to the same database. Put some 23 # sample data into the database. 24 # 25 do_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 # 40 do_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 # 51 do_test lock3-3.1 { 52 execsql {BEGIN IMMEDIATE TRANSACTION} 53 catchsql {SELECT * FROM t1} db2 54 } {0 {1 2}} 55 do_test lock3-3.2 { 56 catchsql {INSERT INTO t1 VALUES(3)} db2 57 } {1 {database is locked}} 58 do_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 # 66 do_test lock3-4.1 { 67 execsql {BEGIN EXCLUSIVE TRANSACTION} 68 catchsql {SELECT * FROM t1} db2 69 } {1 {database is locked}} 70 do_test lock3-4.2 { 71 catchsql {INSERT INTO t1 VALUES(3)} db2 72 } {1 {database is locked}} 73 do_test lock3-4.3 { 74 execsql {END TRANSACTION} 75 } {} 76 77 catch {db2 close} 78 79 finish_test 80
