includes/parser/ParserDiffTest.php

   1 <?php
   2 /**
   3  * Fake parser that output the difference of two different parsers
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Parser
  22  */
  23
  24 /**
  25  * @ingroup Parser
  26  */
  27 class ParserDiffTest
  28 {
  29         public $parsers;
  30         public $conf;
  31         public $shortOutput = false;
  32
  33         public function __construct( $conf ) {
  34                 if ( !isset( $conf['parsers'] ) ) {
  35                         throw new MWException( __METHOD__ . ': no parsers specified' );
  36                 }
  37                 $this->conf = $conf;
  38         }
  39
  40         public function init() {
  41                 if ( !is_null( $this->parsers ) ) {
  42                         return;
  43                 }
  44
  45                 if ( isset( $this->conf['shortOutput'] ) ) {
  46                         $this->shortOutput = $this->conf['shortOutput'];
  47                 }
  48
  49                 foreach ( $this->conf['parsers'] as $i => $parserConf ) {
  50                         if ( !is_array( $parserConf ) ) {
  51                                 $class = $parserConf;
  52                                 $parserConf = array( 'class' => $parserConf );
  53                         } else {
  54                                 $class = $parserConf['class'];
  55                         }
  56                         $this->parsers[$i] = new $class( $parserConf );
  57                 }
  58         }
  59
  60         public function __call( $name, $args ) {
  61                 $this->init();
  62                 $results = array();
  63                 $mismatch = false;
  64                 $lastResult = null;
  65                 $first = true;
  66                 foreach ( $this->parsers as $i => $parser ) {
  67                         $currentResult = call_user_func_array( array( &$this->parsers[$i], $name ), $args );
  68                         if ( $first ) {
  69                                 $first = false;
  70                         } else {
  71                                 if ( is_object( $lastResult ) ) {
  72                                         if ( $lastResult != $currentResult ) {
  73                                                 $mismatch = true;
  74                                         }
  75                                 } else {
  76                                         if ( $lastResult !== $currentResult ) {
  77                                                 $mismatch = true;
  78                                         }
  79                                 }
  80                         }
  81                         $results[$i] = $currentResult;
  82                         $lastResult = $currentResult;
  83                 }
  84                 if ( $mismatch ) {
  85                         if ( count( $results ) == 2 ) {
  86                                 $resultsList = array();
  87                                 foreach ( $this->parsers as $i => $parser ) {
  88                                         $resultsList[] = var_export( $results[$i], true );
  89                                 }
  90                                 $diff = wfDiff( $resultsList[0], $resultsList[1] );
  91                         } else {
  92                                 $diff = '[too many parsers]';
  93                         }
  94                         $msg = "ParserDiffTest: results mismatch on call to $name\n";
  95                         if ( !$this->shortOutput ) {
  96                                 $msg .= 'Arguments: ' . $this->formatArray( $args ) . "\n";
  97                         }
  98                         $msg .= 'Results: ' . $this->formatArray( $results ) . "\n" .
  99                                 "Diff: $diff\n";
 100                         throw new MWException( $msg );
 101                 }
 102                 return $lastResult;
 103         }
 104
 105         public function formatArray( $array ) {
 106                 if ( $this->shortOutput ) {
 107                         foreach ( $array as $key => $value ) {
 108                                 if ( $value instanceof ParserOutput ) {
 109                                         $array[$key] = "ParserOutput: {$value->getText()}";
 110                                 }
 111                         }
 112                 }
 113                 return var_export( $array, true );
 114         }
 115
 116         public function setFunctionHook( $id, $callback, $flags = 0 ) {
 117                 $this->init();
 118                 foreach ( $this->parsers as $parser ) {
 119                         $parser->setFunctionHook( $id, $callback, $flags );
 120                 }
 121         }
 122 }