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