--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/in2.test	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,67 @@
+# 2007 May 12
+#
+# 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 tests a special case in the b-tree code that can be
+# hit by the "IN" operator (or EXISTS, NOT IN, etc.).
+#
+# $Id: in2.test,v 1.3 2008/07/12 14:52:20 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_test in2-1 {
+  execsql {
+    CREATE TABLE a(i INTEGER PRIMARY KEY, a);
+  }
+} {}
+
+set ::N 2000
+
+do_test in2-2 {
+  db transaction {
+    for {set ::ii 0} {$::ii < $::N} {incr ::ii} {
+      execsql {INSERT INTO a VALUES($::ii, $::ii)}
+    }
+    execsql {INSERT INTO a VALUES(4000, '')}
+
+    for {set ::ii 0} {$::ii < $::N} {incr ::ii} {
+      set ::t [format "x%04d" $ii]
+      execsql {INSERT INTO a VALUES(NULL, $::t)}
+    }
+  }
+} {}
+
+# Each iteration of this loop builds a slightly different b-tree to
+# evaluate the "IN (...)" operator in the SQL statement. The contents
+# of the b-tree are (in sorted order):
+#
+#     $::ii integers.
+#     a string of zero length.
+#     $::N short strings.
+#
+# Records are inserted in sorted order.
+#
+# The string of zero-length is stored in a b-tree cell with 3 bytes
+# of payload. Moving this cell from a leaf node to a internal node 
+# during b-tree balancing was causing an assertion failure. 
+#
+# This bug only applied to b-trees generated to evaluate IN (..) 
+# clauses, as it is impossible for persistent b-trees (SQL tables + 
+# indices) to contain cells smaller than 4 bytes.
+#
+for {set ::ii 3} {$::ii < $::N} {incr ::ii} {
+  do_test in2-$::ii {
+    execsql {
+      SELECT 1 IN (SELECT a FROM a WHERE (i < $::ii) OR (i >= $::N))
+    }
+  } {1}
+}
+
+finish_test