sl@0: # 2001 September 15
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.  The
sl@0: # focus of this script is database locks and the operation of the
sl@0: # DEFERRED, IMMEDIATE, and EXCLUSIVE keywords as modifiers to the
sl@0: # BEGIN command.
sl@0: #
sl@0: # $Id: lock3.test,v 1.1 2004/10/05 02:41:43 drh Exp $
sl@0: 
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: # Establish two connections to the same database.  Put some
sl@0: # sample data into the database.
sl@0: #
sl@0: do_test lock3-1.1 {
sl@0:   sqlite3 db2 test.db
sl@0:   execsql {
sl@0:     CREATE TABLE t1(a);
sl@0:     INSERT INTO t1 VALUES(1);
sl@0:   }
sl@0:   execsql {
sl@0:     SELECT * FROM t1
sl@0:   } db2
sl@0: } 1
sl@0: 
sl@0: # Get a deferred lock on the database using one connection.  The
sl@0: # other connection should still be able to write.
sl@0: #
sl@0: do_test lock3-2.1 {
sl@0:   execsql {BEGIN DEFERRED TRANSACTION}
sl@0:   execsql {INSERT INTO t1 VALUES(2)} db2
sl@0:   execsql {END TRANSACTION}
sl@0:   execsql {SELECT * FROM t1}
sl@0: } {1 2}
sl@0: 
sl@0: # Get an immediate lock on the database using one connection.  The
sl@0: # other connection should be able to read the database but not write
sl@0: # it.
sl@0: #
sl@0: do_test lock3-3.1 {
sl@0:   execsql {BEGIN IMMEDIATE TRANSACTION}
sl@0:   catchsql {SELECT * FROM t1} db2
sl@0: } {0 {1 2}}
sl@0: do_test lock3-3.2 {
sl@0:   catchsql {INSERT INTO t1 VALUES(3)} db2
sl@0: } {1 {database is locked}}
sl@0: do_test lock3-3.3 {
sl@0:   execsql {END TRANSACTION}
sl@0: } {}
sl@0: 
sl@0: 
sl@0: # Get an exclusive lock on the database using one connection.  The
sl@0: # other connection should be unable to read or write the database.
sl@0: #
sl@0: do_test lock3-4.1 {
sl@0:   execsql {BEGIN EXCLUSIVE TRANSACTION}
sl@0:   catchsql {SELECT * FROM t1} db2
sl@0: } {1 {database is locked}}
sl@0: do_test lock3-4.2 {
sl@0:   catchsql {INSERT INTO t1 VALUES(3)} db2
sl@0: } {1 {database is locked}}
sl@0: do_test lock3-4.3 {
sl@0:   execsql {END TRANSACTION}
sl@0: } {}
sl@0: 
sl@0: catch {db2 close}
sl@0: 
sl@0: finish_test