--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/capi3b.test	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,145 @@
+# 2004 September 2
+#
+# 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.  The
+# focus of this script testing the callback-free C/C++ API and in
+# particular the behavior of sqlite3_step() when trying to commit
+# with lock contention.
+#
+# $Id: capi3b.test,v 1.4 2007/08/10 19:46:14 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+
+# These tests depend on the pager holding changes in cache
+# until it is time to commit.  But that won't happen if the
+# soft-heap-limit is set too low.  So disable the soft heap limit
+# for the duration of this test.
+#
+sqlite3_soft_heap_limit 0
+
+
+set DB [sqlite3_connection_pointer db]
+sqlite3 db2 test.db
+set DB2 [sqlite3_connection_pointer db2]
+
+# Create some data in the database
+#
+do_test capi3b-1.1 {
+  execsql {
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(1);
+    INSERT INTO t1 VALUES(2);
+    SELECT * FROM t1
+  }
+} {1 2}
+
+# Make sure the second database connection can see the data
+#
+do_test capi3b-1.2 {
+  execsql {
+    SELECT * FROM t1
+  } db2
+} {1 2}
+
+# First database connection acquires a shared lock
+#
+do_test capi3b-1.3 {
+  execsql {
+    BEGIN;
+    SELECT * FROM t1;
+  }
+} {1 2}
+
+# Second database connection tries to write.  The sqlite3_step()
+# function returns SQLITE_BUSY because it cannot commit.
+#
+do_test capi3b-1.4 {
+  set VM [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(3)} -1 TAIL]
+  sqlite3_step $VM
+} SQLITE_BUSY
+
+# The sqlite3_step call can be repeated multiple times.
+#
+do_test capi3b-1.5.1 {
+  sqlite3_step $VM
+} SQLITE_BUSY
+do_test capi3b-1.5.2 {
+  sqlite3_step $VM
+} SQLITE_BUSY
+
+# The first connection closes its transaction.  This allows the second
+# connections sqlite3_step to succeed.
+#
+do_test capi3b-1.6 {
+  execsql COMMIT
+  sqlite3_step $VM
+} SQLITE_DONE
+do_test capi3b-1.7 {
+  sqlite3_finalize $VM
+} SQLITE_OK
+do_test capi3b-1.8 {
+  execsql {SELECT * FROM t1} db2
+} {1 2 3}
+do_test capi3b-1.9 {
+  execsql {SELECT * FROM t1}
+} {1 2 3}
+
+# Start doing a SELECT with one connection.  This gets a SHARED lock.
+# Then do an INSERT with the other connection.  The INSERT should
+# not be able to complete until the SELECT finishes.
+#
+do_test capi3b-2.1 {
+  set VM1 [sqlite3_prepare $DB {SELECT * FROM t1} -1 TAIL]
+  sqlite3_step $VM1
+} SQLITE_ROW
+do_test capi3b-2.2 {
+  sqlite3_column_text $VM1 0
+} 1
+do_test capi3b-2.3 {
+  set VM2 [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(4)} -1 TAIL]
+  sqlite3_step $VM2
+} SQLITE_BUSY
+do_test capi3b-2.4 {
+  sqlite3_step $VM1
+} SQLITE_ROW
+do_test capi3b-2.5 {
+  sqlite3_column_text $VM1 0
+} 2
+do_test capi3b-2.6 {
+  sqlite3_step $VM2
+} SQLITE_BUSY
+do_test capi3b-2.7 {
+  sqlite3_step $VM1
+} SQLITE_ROW
+do_test capi3b-2.8 {
+  sqlite3_column_text $VM1 0
+} 3
+do_test capi3b-2.9 {
+  sqlite3_step $VM2
+} SQLITE_BUSY
+do_test capi3b-2.10 {
+  sqlite3_step $VM1
+} SQLITE_DONE
+do_test capi3b-2.11 {
+  sqlite3_step $VM2
+} SQLITE_DONE
+do_test capi3b-2.12 {
+  sqlite3_finalize $VM1
+  sqlite3_finalize $VM2
+  execsql {SELECT * FROM t1}
+} {1 2 3 4}
+
+catch {db2 close}
+
+sqlite3_soft_heap_limit $soft_limit
+finish_test