From 7bb481fda9ecb134804b49c2ce77ca28f7eea583 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <hans@eds.org>
Date: Fri, 30 Mar 2012 20:42:12 -0400
Subject: Imported Upstream version 2.0.3

---
 test/cache.test | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 test/cache.test

(limited to 'test/cache.test')

diff --git a/test/cache.test b/test/cache.test
new file mode 100644
index 0000000..8d801f0
--- /dev/null
+++ b/test/cache.test
@@ -0,0 +1,140 @@
+# 2007 March 24
+#
+# 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.
+#
+#***********************************************************************
+#
+# $Id: cache.test,v 1.4 2007/08/22 02:56:44 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable {!pager_pragmas} {
+  finish_test
+  return
+}
+sqlite3_soft_heap_limit 0
+
+proc pager_cache_size {db} {
+  set bt [btree_from_db $db]
+  db_enter $db
+  array set stats [btree_pager_stats $bt]
+  db_leave $db
+  return $stats(page)
+}
+
+if {[permutation] == ""} { 
+  do_test cache-1.1 { pager_cache_size db } {0}
+}
+
+do_test cache-1.2 {
+  execsql {
+    PRAGMA auto_vacuum=OFF;
+    CREATE TABLE abc(a, b, c);
+    INSERT INTO abc VALUES(1, 2, 3);
+  }
+  pager_cache_size db
+} {2}
+
+# At one point, repeatedly locking and unlocking the cache was causing
+# a resource leak of one page per repetition. The page wasn't actually
+# leaked, but would not be reused until the pager-cache was full (i.e. 
+# 2000 pages by default).
+#
+# This tests that once the pager-cache is initialised, it can be locked
+# and unlocked repeatedly without internally allocating any new pages.
+#
+set cache_size [pager_cache_size db]
+for {set ii 0} {$ii < 10} {incr ii} {
+  do_test cache-1.3.$ii {
+    execsql {SELECT * FROM abc}
+    pager_cache_size db
+  } $::cache_size
+}
+
+#-------------------------------------------------------------------------
+# This block of tests checks that it is possible to set the cache_size of a
+# database to a small (< 10) value. More specifically:
+#
+#   cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small 
+#                values.
+#   cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with 
+#                small values.
+#   cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache. 
+#   cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache. 
+#
+#
+db_delete_and_reopen
+do_execsql_test cache-2.0 {
+  PRAGMA auto_vacuum=OFF;
+  PRAGMA journal_mode=DELETE;
+  CREATE TABLE t1(a, b);
+  CREATE TABLE t2(c, d);
+  INSERT INTO t1 VALUES('x', 'y');
+  INSERT INTO t2 VALUES('i', 'j');
+} {delete}
+
+for {set i 0} {$i < 20} {incr i} {
+  do_execsql_test cache-2.1.$i.1 "PRAGMA cache_size = $i"
+  do_execsql_test cache-2.1.$i.2 "PRAGMA cache_size" $i
+  do_execsql_test cache-2.1.$i.3 "SELECT * FROM t1" {x y}
+  do_execsql_test cache-2.1.$i.4 "PRAGMA cache_size" $i
+}
+for {set i 0} {$i < 20} {incr i} {
+  do_execsql_test cache-2.2.$i.1 "PRAGMA main.cache_size = $i"
+  do_execsql_test cache-2.2.$i.2 "PRAGMA main.cache_size" $i
+  do_execsql_test cache-2.2.$i.3 "SELECT * FROM t1" {x y}
+  do_execsql_test cache-2.2.$i.4 "PRAGMA main.cache_size" $i
+}
+
+# Tests for cache_size = 1.
+#
+do_execsql_test cache-2.3.1 {
+  PRAGMA cache_size = 1;
+  BEGIN;
+    INSERT INTO t1 VALUES(1, 2);
+    PRAGMA lock_status;
+} {main reserved temp closed}
+do_test cache-2.3.2 { pager_cache_size db } 2
+do_execsql_test cache-2.3.3 {
+    INSERT INTO t2 VALUES(1, 2);
+    PRAGMA lock_status;
+} {main exclusive temp closed}
+do_test cache-2.3.4 { pager_cache_size db } 2
+do_execsql_test cache-2.3.5 COMMIT
+do_test cache-2.3.6 { pager_cache_size db } 1
+
+do_execsql_test cache-2.3.7 {
+  SELECT * FROM t1 UNION SELECT * FROM t2;
+} {1 2 i j x y}
+do_test cache-2.3.8 { pager_cache_size db } 1
+
+# Tests for cache_size = 0.
+#
+do_execsql_test cache-2.4.1 {
+  PRAGMA cache_size = 0;
+  BEGIN;
+    INSERT INTO t1 VALUES(1, 2);
+    PRAGMA lock_status;
+} {main reserved temp closed}
+do_test cache-2.4.2 { pager_cache_size db } 2
+do_execsql_test cache-2.4.3 {
+    INSERT INTO t2 VALUES(1, 2);
+    PRAGMA lock_status;
+} {main exclusive temp closed}
+do_test cache-2.4.4 { pager_cache_size db } 2
+do_execsql_test cache-2.4.5 COMMIT
+
+do_test cache-2.4.6 { pager_cache_size db } 0
+do_execsql_test cache-2.4.7 {
+  SELECT * FROM t1 UNION SELECT * FROM t2;
+} {1 2 i j x y}
+do_test cache-2.4.8 { pager_cache_size db } 0
+
+sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
+finish_test
-- 
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