[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/test/pcache2.test

+# 2008 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 is focused on testing the pcache module.
+#
+# $Id: pcache2.test,v 1.5 2009/07/18 14:36:24 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+test_set_config_pagecache 0 0
+
+# Set up a pcache memory pool so that we can easily track how many
+# pages are being used for cache.
+#
+do_test pcache2-1.1 {
+  db close
+  sqlite3_reset_auto_extension
+  sqlite3_shutdown
+  sqlite3_config_pagecache 6000 100
+  sqlite3_config singlethread
+  sqlite3_initialize
+  autoinstall_test_functions
+  sqlite3_status SQLITE_STATUS_PAGECACHE_USED 1
+  sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0
+} {0 0 0}
+
+# Open up two database connections to separate files.
+#
+do_test pcache2-1.2 {
+  forcedelete test.db test.db-journal
+  sqlite3 db test.db
+  db eval {PRAGMA cache_size=10; SELECT 1 FROM sqlite_master;}
+  lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 1
+} {2}
+do_test pcache2-1.3 {
+  forcedelete test2.db test2.db-journal
+  sqlite3 db2 test2.db
+  db2 eval {PRAGMA cache_size=50; SELECT 1 FROM sqlite_master;}
+  lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 1
+} {4}
+
+
+# Make lots of changes on the first connection.  Verify that the
+# page cache usage does not grow to consume the page space set aside
+# for the second connection.
+#
+do_test pcache2-1.4 {
+  db eval {
+     CREATE TABLE t1(a,b);
+     CREATE TABLE t2(x,y);
+     INSERT INTO t1 VALUES(1, zeroblob(800));
+     INSERT INTO t1 VALUES(2, zeroblob(800));
+     INSERT INTO t2 SELECT * FROM t1;
+     INSERT INTO t1 SELECT x+2, y FROM t2;
+     INSERT INTO t2 SELECT a+10, b FROM t1;
+     INSERT INTO t1 SELECT x+10, y FROM t2;
+     INSERT INTO t2 SELECT a+100, b FROM t1;
+     INSERT INTO t1 SELECT x+100, y FROM t2;
+     INSERT INTO t2 SELECT a+1000, b FROM t1;
+     INSERT INTO t1 SELECT x+1000, y FROM t2;
+  }
+  sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0
+} {0 13 13}
+
+db close
+catch {db2 close}
+sqlite3_reset_auto_extension
+sqlite3_shutdown
+sqlite3_config_pagecache 0 0
+sqlite3_config serialized
+sqlite3_initialize
+autoinstall_test_functions
+
+test_restore_config_pagecache
+finish_test