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 

    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   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 #

    39 do_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 #

    50 do_test lock3-3.1 {

    51   execsql {BEGIN IMMEDIATE TRANSACTION}

    52   catchsql {SELECT * FROM t1} db2

    53 } {0 {1 2}}

    54 do_test lock3-3.2 {

    55   catchsql {INSERT INTO t1 VALUES(3)} db2

    56 } {1 {database is locked}}

    57 do_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 #

    65 do_test lock3-4.1 {

    66   execsql {BEGIN EXCLUSIVE TRANSACTION}

    67   catchsql {SELECT * FROM t1} db2

    68 } {1 {database is locked}}

    69 do_test lock3-4.2 {

    70   catchsql {INSERT INTO t1 VALUES(3)} db2

    71 } {1 {database is locked}}

    72 do_test lock3-4.3 {

    73   execsql {END TRANSACTION}

    74 } {}

    75 

    76 catch {db2 close}

    77 

    78 finish_test