sl@0: # 2004 September 2
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.  The
sl@0: # focus of this script testing the callback-free C/C++ API and in
sl@0: # particular the behavior of sqlite3_step() when trying to commit
sl@0: # with lock contention.
sl@0: #
sl@0: # $Id: capi3b.test,v 1.4 2007/08/10 19:46:14 drh Exp $
sl@0: #
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: 
sl@0: # These tests depend on the pager holding changes in cache
sl@0: # until it is time to commit.  But that won't happen if the
sl@0: # soft-heap-limit is set too low.  So disable the soft heap limit
sl@0: # for the duration of this test.
sl@0: #
sl@0: sqlite3_soft_heap_limit 0
sl@0: 
sl@0: 
sl@0: set DB [sqlite3_connection_pointer db]
sl@0: sqlite3 db2 test.db
sl@0: set DB2 [sqlite3_connection_pointer db2]
sl@0: 
sl@0: # Create some data in the database
sl@0: #
sl@0: do_test capi3b-1.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t1(x);
sl@0:     INSERT INTO t1 VALUES(1);
sl@0:     INSERT INTO t1 VALUES(2);
sl@0:     SELECT * FROM t1
sl@0:   }
sl@0: } {1 2}
sl@0: 
sl@0: # Make sure the second database connection can see the data
sl@0: #
sl@0: do_test capi3b-1.2 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1
sl@0:   } db2
sl@0: } {1 2}
sl@0: 
sl@0: # First database connection acquires a shared lock
sl@0: #
sl@0: do_test capi3b-1.3 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     SELECT * FROM t1;
sl@0:   }
sl@0: } {1 2}
sl@0: 
sl@0: # Second database connection tries to write.  The sqlite3_step()
sl@0: # function returns SQLITE_BUSY because it cannot commit.
sl@0: #
sl@0: do_test capi3b-1.4 {
sl@0:   set VM [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(3)} -1 TAIL]
sl@0:   sqlite3_step $VM
sl@0: } SQLITE_BUSY
sl@0: 
sl@0: # The sqlite3_step call can be repeated multiple times.
sl@0: #
sl@0: do_test capi3b-1.5.1 {
sl@0:   sqlite3_step $VM
sl@0: } SQLITE_BUSY
sl@0: do_test capi3b-1.5.2 {
sl@0:   sqlite3_step $VM
sl@0: } SQLITE_BUSY
sl@0: 
sl@0: # The first connection closes its transaction.  This allows the second
sl@0: # connections sqlite3_step to succeed.
sl@0: #
sl@0: do_test capi3b-1.6 {
sl@0:   execsql COMMIT
sl@0:   sqlite3_step $VM
sl@0: } SQLITE_DONE
sl@0: do_test capi3b-1.7 {
sl@0:   sqlite3_finalize $VM
sl@0: } SQLITE_OK
sl@0: do_test capi3b-1.8 {
sl@0:   execsql {SELECT * FROM t1} db2
sl@0: } {1 2 3}
sl@0: do_test capi3b-1.9 {
sl@0:   execsql {SELECT * FROM t1}
sl@0: } {1 2 3}
sl@0: 
sl@0: # Start doing a SELECT with one connection.  This gets a SHARED lock.
sl@0: # Then do an INSERT with the other connection.  The INSERT should
sl@0: # not be able to complete until the SELECT finishes.
sl@0: #
sl@0: do_test capi3b-2.1 {
sl@0:   set VM1 [sqlite3_prepare $DB {SELECT * FROM t1} -1 TAIL]
sl@0:   sqlite3_step $VM1
sl@0: } SQLITE_ROW
sl@0: do_test capi3b-2.2 {
sl@0:   sqlite3_column_text $VM1 0
sl@0: } 1
sl@0: do_test capi3b-2.3 {
sl@0:   set VM2 [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(4)} -1 TAIL]
sl@0:   sqlite3_step $VM2
sl@0: } SQLITE_BUSY
sl@0: do_test capi3b-2.4 {
sl@0:   sqlite3_step $VM1
sl@0: } SQLITE_ROW
sl@0: do_test capi3b-2.5 {
sl@0:   sqlite3_column_text $VM1 0
sl@0: } 2
sl@0: do_test capi3b-2.6 {
sl@0:   sqlite3_step $VM2
sl@0: } SQLITE_BUSY
sl@0: do_test capi3b-2.7 {
sl@0:   sqlite3_step $VM1
sl@0: } SQLITE_ROW
sl@0: do_test capi3b-2.8 {
sl@0:   sqlite3_column_text $VM1 0
sl@0: } 3
sl@0: do_test capi3b-2.9 {
sl@0:   sqlite3_step $VM2
sl@0: } SQLITE_BUSY
sl@0: do_test capi3b-2.10 {
sl@0:   sqlite3_step $VM1
sl@0: } SQLITE_DONE
sl@0: do_test capi3b-2.11 {
sl@0:   sqlite3_step $VM2
sl@0: } SQLITE_DONE
sl@0: do_test capi3b-2.12 {
sl@0:   sqlite3_finalize $VM1
sl@0:   sqlite3_finalize $VM2
sl@0:   execsql {SELECT * FROM t1}
sl@0: } {1 2 3 4}
sl@0: 
sl@0: catch {db2 close}
sl@0: 
sl@0: sqlite3_soft_heap_limit $soft_limit
sl@0: finish_test