[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/test/fts3expr5.test

+# 2006 September 9
+#
+# 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 is testing the FTS3 module.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix fts3expr5
+
+# If SQLITE_ENABLE_FTS3 is defined, omit this file.
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+#-------------------------------------------------------------------------
+# Various forms of empty phrase expressions.
+#
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE t0 USING fts3(x);
+  SELECT rowid FROM t0 WHERE x MATCH '';
+} {}
+do_execsql_test 1.1 {
+  SELECT rowid FROM t0 WHERE x MATCH '""';
+} {}
+do_execsql_test 1.2 {
+  SELECT rowid FROM t0 WHERE x MATCH '"" ""';
+} {}
+do_execsql_test 1.3 {
+  SELECT rowid FROM t0 WHERE x MATCH '"" OR ""';
+} {}
+do_execsql_test 1.4 {
+  SELECT rowid FROM t0 WHERE x MATCH '"" NOT ""';
+} {}
+do_execsql_test 1.5 {
+  SELECT rowid FROM t0 WHERE x MATCH '""""';
+} {}
+
+finish_test