119 lines
2.7 KiB
Plaintext
119 lines
2.7 KiB
Plaintext
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# 2007 April 6
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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.
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#
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# $Id: lock4.test,v 1.10 2009/05/06 00:52:41 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_not_use_codec
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# Initialize the test.db database so that it is non-empty
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#
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do_test lock4-1.1 {
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db eval {
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PRAGMA auto_vacuum=OFF;
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CREATE TABLE t1(x);
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}
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forcedelete test2.db test2.db-journal
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sqlite3 db2 test2.db
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db2 eval {
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PRAGMA auto_vacuum=OFF;
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CREATE TABLE t2(x)
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}
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db2 close
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list [file size test.db] [file size test2.db]
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} {2048 2048}
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# Create a script to drive a separate process that will
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#
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# 1. Create a second database test2.db
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# 2. Get an exclusive lock on test2.db
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# 3. Add an entry to test.db in table t1, waiting as necessary.
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# 4. Commit the change to test2.db.
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#
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# Meanwhile, this process will:
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#
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# A. Get an exclusive lock on test.db
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# B. Attempt to read from test2.db but get an SQLITE_BUSY error.
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# C. Commit the changes to test.db thus alloing the other process
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# to continue.
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#
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do_test lock4-1.2 {
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# Create a script for the second process to run.
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#
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set out [open test2-script.tcl w]
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puts $out "sqlite3_test_control_pending_byte [set sqlite_pending_byte]"
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puts $out {
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sqlite3 db2 test2.db
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db2 eval {
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BEGIN;
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INSERT INTO t2 VALUES(2);
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}
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sqlite3 db test.db
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db timeout 1000000
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db eval {
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INSERT INTO t1 VALUES(2);
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}
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db close
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db2 eval COMMIT
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exit
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}
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close $out
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# Begin a transaction on test.db.
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db eval {
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BEGIN EXCLUSIVE;
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INSERT INTO t1 VALUES(1);
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}
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# Kick off the second process.
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exec [info nameofexec] ./test2-script.tcl &
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# Wait until the second process has started its transaction on test2.db.
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while {![file exists test2.db-journal]} {
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after 10
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}
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# Try to write to test2.db. We are locked out.
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sqlite3 db2 test2.db
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catchsql {
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INSERT INTO t2 VALUES(1)
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} db2
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} {1 {database is locked}}
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do_test lock4-1.3 {
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db eval {
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COMMIT;
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}
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while {[file exists test2.db-journal]} {
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after 10
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}
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# The other process has committed its transaction on test2.db by
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# deleting the journal file. But it might retain the lock for a
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# fraction longer
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#
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after 25
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db2 eval {
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SELECT * FROM t2
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}
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} {2}
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do_test lock4-999.1 {
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rename db2 {}
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} {}
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finish_test
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