xref: /sqlite-3.40.0/test/lock3.test (revision 4dcbdbff) 
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 1.1 2004/10/05 02:41:43 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  sqlite3 db2 test.db
27  execsql {
28    CREATE TABLE t1(a);
29    INSERT INTO t1 VALUES(1);
30  }
31  execsql {
32    SELECT * FROM t1
33  } db2
34} 1
35
36# Get a deferred lock on the database using one connection.  The
37# other connection should still be able to write.
38#
39do_test lock3-2.1 {
40  execsql {BEGIN DEFERRED TRANSACTION}
41  execsql {INSERT INTO t1 VALUES(2)} db2
42  execsql {END TRANSACTION}
43  execsql {SELECT * FROM t1}
44} {1 2}
45
46# Get an immediate lock on the database using one connection.  The
47# other connection should be able to read the database but not write
48# it.
49#
50do_test lock3-3.1 {
51  execsql {BEGIN IMMEDIATE TRANSACTION}
52  catchsql {SELECT * FROM t1} db2
53} {0 {1 2}}
54do_test lock3-3.2 {
55  catchsql {INSERT INTO t1 VALUES(3)} db2
56} {1 {database is locked}}
57do_test lock3-3.3 {
58  execsql {END TRANSACTION}
59} {}
60
61
62# Get an exclusive lock on the database using one connection.  The
63# other connection should be unable to read or write the database.
64#
65do_test lock3-4.1 {
66  execsql {BEGIN EXCLUSIVE TRANSACTION}
67  catchsql {SELECT * FROM t1} db2
68} {1 {database is locked}}
69do_test lock3-4.2 {
70  catchsql {INSERT INTO t1 VALUES(3)} db2
71} {1 {database is locked}}
72do_test lock3-4.3 {
73  execsql {END TRANSACTION}
74} {}
75
76catch {db2 close}
77
78finish_test
79