Test: feeds random strings to both pure PHP and ICU code paths looking for differences.

diff --git a/includes/normal/RandomTest.php b/includes/normal/RandomTest.php
new file mode 100644 (file)
index 0000000..562ead7
--- /dev/null
+++ b/includes/normal/RandomTest.php
@@ -0,0 +1,106 @@
+<?php
+# Copyright (C) 2004 Brion Vibber <brion@pobox.com>
+# http://www.mediawiki.org/
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or 
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# http://www.gnu.org/copyleft/gpl.html
+
+/**
+ * Test feeds random 16-byte strings to both the pure PHP and ICU-based
+ * UtfNormal::cleanUp() code paths, and checks to see if there's a
+ * difference. Will run forever until it finds one or you kill it.
+ * 
+ * @package UtfNormal
+ * @access private
+ */
+
+if( php_sapi_name() != 'cli' ) {
+       die( "Run me from the command line please.\n" );
+}
+
+require_once( 'UtfNormal.php' );
+require_once( '../DifferenceEngine.php' );
+
+dl('php_utfnormal.so' );
+
+# mt_srand( 99999 );
+
+function randomString( $length, $nullOk, $ascii = false ) {
+       $out = '';
+       for( $i = 0; $i < $length; $i++ )
+               $out .= chr( mt_rand( $nullOk ? 0 : 1, $ascii ? 127 : 255 ) );
+       return $out;
+}
+
+/* Duplicate of the cleanUp() path for ICU usage */
+function donorm( $str ) {
+       # We exclude a few chars that ICU would not.
+       $str = preg_replace( '/[\x00-\x08\x0b\x0c\x0e-\x1f]/', UTF8_REPLACEMENT, $str );
+       $str = str_replace( UTF8_FFFE, UTF8_REPLACEMENT, $str );
+       $str = str_replace( UTF8_FFFF, UTF8_REPLACEMENT, $str );
+       
+       # UnicodeString constructor fails if the string ends with a head byte.
+       # Add a junk char at the end, we'll strip it off
+       return rtrim( utf8_normalize( $str . "\x01", UNORM_NFC ), "\x01" );
+}
+
+function wfMsg($x) {
+       return $x;
+}
+
+function showDiffs( $a, $b ) {
+       $ota = explode( "\n", str_replace( "\r\n", "\n", $a ) );
+       $nta = explode( "\n", str_replace( "\r\n", "\n", $b ) );
+       
+       $diffs =& new Diff( $ota, $nta );
+       $formatter =& new TableDiffFormatter();
+       $funky = $formatter->format( $diffs );
+       preg_match_all( '/<span class="diffchange">(.*?)<\/span>/', $funky, $matches );
+       foreach( $matches[1] as $bit ) {
+               $hex = bin2hex( $bit );
+               echo "\t$hex\n";
+       }
+}
+
+$size = 16;
+$n = 0;
+while( true ) {
+       $n++;
+       echo "$n\n";
+       
+       $str = randomString( $size, true);
+       $clean = UtfNormal::cleanUp( $str );
+       $norm = donorm( $str );
+
+       echo strlen( $clean ) . ", " . strlen( $norm );
+       if( $clean == $norm ) {
+               echo " (match)\n";
+       } else {
+               echo " (FAIL)\n";
+               echo "\traw: " . bin2hex( $str ) . "\n" .
+                        "\tphp: " . bin2hex( $clean ) . "\n" .
+                        "\ticu: " . bin2hex( $norm ) . "\n";
+               echo "\n\tdiffs:\n";
+               showDiffs( $clean, $norm );
+               die();
+       }
+       
+       
+       $str = '';
+       $clean = '';
+       $norm = '';
+}
+
+?>
\ No newline at end of file