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+# 2001 September 15
+#
+# The author disclaims copyright to this source code. In place of
+# a legal notice, here is a blessing:
+#
+# May you do good and not evil.
+# May you find forgiveness for yourself and forgive others.
+# May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. The
+# focus of this script is database locks and the operation of the
+# DEFERRED, IMMEDIATE, and EXCLUSIVE keywords as modifiers to the
+# BEGIN command.
+#
+# $Id: lock3.test,v 1.4 2009/03/28 15:04:24 drh Exp $
+
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Establish two connections to the same database. Put some
+# sample data into the database.
+#
+do_test lock3-1.1 {
+ file mkdir tempdir/t1/t2/t3
+ sqlite3 db2 ./tempdir/t1//t2/./t3//./../..//./../../tempdir/..//test.db//
+ execsql {
+ CREATE TABLE t1(a);
+ INSERT INTO t1 VALUES(1);
+ }
+ execsql {
+ SELECT * FROM t1
+ } db2
+} 1
+
+# Get a deferred lock on the database using one connection. The
+# other connection should still be able to write.
+#
+do_test lock3-2.1 {
+ execsql {BEGIN DEFERRED TRANSACTION}
+ execsql {INSERT INTO t1 VALUES(2)} db2
+ execsql {END TRANSACTION}
+ execsql {SELECT * FROM t1}
+} {1 2}
+
+# Get an immediate lock on the database using one connection. The
+# other connection should be able to read the database but not write
+# it.
+#
+do_test lock3-3.1 {
+ execsql {BEGIN IMMEDIATE TRANSACTION}
+ catchsql {SELECT * FROM t1} db2
+} {0 {1 2}}
+do_test lock3-3.2 {
+ catchsql {INSERT INTO t1 VALUES(3)} db2
+} {1 {database is locked}}
+do_test lock3-3.3 {
+ execsql {END TRANSACTION}
+} {}
+
+
+# Get an exclusive lock on the database using one connection. The
+# other connection should be unable to read or write the database.
+#
+do_test lock3-4.1 {
+ execsql {BEGIN EXCLUSIVE TRANSACTION}
+ catchsql {SELECT * FROM t1} db2
+} {1 {database is locked}}
+do_test lock3-4.2 {
+ catchsql {INSERT INTO t1 VALUES(3)} db2
+} {1 {database is locked}}
+do_test lock3-4.3 {
+ execsql {END TRANSACTION}
+} {}
+
+catch {db2 close}
+
+finish_test