[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/tkt3793.test

-# 2009 April 10
-#
-# 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.
-#
-# This file implements tests to verify that ticket #3793 has been
-# fixed.  
-#
-# $Id: tkt3793.test,v 1.2 2009/06/01 16:42:18 shane Exp $
-
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-
-ifcapable !shared_cache||!attach {
-  finish_test
-  return
-}
-set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
-
-do_test tkt3793-1.1 {
-  # This is taken from shared.test.  The Windows VFS expands 
-  # ./test.db (and test.db) to be the same thing so the path
-  # matches and they share a cache.  By changing the case 
-  # for Windows platform, we get around this and get a separate
-  # connection.
-  if {$::tcl_platform(platform)=="unix"} {
-    sqlite3 db1 test.db
-    sqlite3 db2 test.db
-  } else {
-    sqlite3 db1 TEST.DB
-    sqlite3 db2 TEST.DB
-  }
-  execsql {
-    BEGIN;
-    CREATE TABLE t1(a, b);
-    CREATE TABLE t2(a PRIMARY KEY, b);
-    INSERT INTO t1 VALUES(randstr(50,50), randstr(50,50));
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t1 SELECT randstr(50,50), randstr(50,50) FROM t1;
-    INSERT INTO t2 SELECT * FROM t1;
-    COMMIT;
-  }
-} {}
-
-proc busyhandler {db args} { set ::busyconnection $db ; return 1 }
-db2 busy {busyhandler db2}
-db1 busy {busyhandler db1}
-
-# Establish a read-lock on the database file using connection [db].
-#
-do_test tkt3793-1.2 {
-  execsql {
-    BEGIN;
-    SELECT count(*) FROM t1;
-  }
-} {1024}
-
-# Set the size of the cache shared by [db1] and [db2] to 10. Then update
-# more than 10 pages of table t1. At this point the shared-cache will
-# hold a RESERVED lock on the database file. Even though there are now
-# more than 10 dirty pages in memory, it cannot upgrade to an EXCLUSIVE 
-# lock because of the read-lock held by [db].
-#
-do_test tkt3793-1.3 {
-  execsql {
-    PRAGMA cache_size = 10;
-    BEGIN;
-    UPDATE t1 SET b = randstr(50,50);
-  } db1
-} {}
-
-set x 0
-
-# Run one SELECT query on the shared-cache using [db1], then from within 
-# the callback run another via [db2]. Because of the large number of dirty
-# pages within the cache, each time a new page is read from the database
-# SQLite will attempt to upgrade to an EXCLUSIVE lock, and hence invoke
-# the busy-handler. The tests here verify that the correct busy-handler
-# function is invoked (the busy-handler associated with the database
-# connection that called sqlite3_step()). When bug #3793 existed, sometimes
-# the [db2] busy-handler was invoked from within the call to sqlite3_step()
-# associated with [db1]. 
-#
-# Note: Before the bug was fixed, if [db2] was opened with the "-fullmutex 1"
-# option, then this test case would cause an assert() to fail.
-#
-ifcapable threadsafe {
-  set ::busyconnection db1
-  db1 eval {SELECT * FROM t2 ORDER BY a LIMIT 20} {
-    do_test tkt3793-2.[incr x] { set ::busyconnection } db1
-    set ::busyconnection db2
-  
-    db2 eval { SELECT count(*) FROM t2 }
-    do_test tkt3793-2.[incr x] { set ::busyconnection } db2
-    set ::busyconnection db1
-  }
-}
-  
-do_test tkt3793-3 {
-  db1 close
-  db2 close
-} {}
-
-sqlite3_enable_shared_cache $::enable_shared_cache
-finish_test