tests/phpunit/includes/DiffHistoryBlobTest.php

   1 <?php
   2
   3 class DiffHistoryBlobTest extends MediaWikiTestCase {
   4
   5         protected function setUp() {
   6                 parent::setUp();
   7
   8                 $this->checkPHPExtension( 'hash' );
   9                 $this->checkPHPExtension( 'xdiff' );
  10
  11                 if ( !function_exists( 'xdiff_string_rabdiff' ) ) {
  12                         $this->markTestSkipped( 'The version of xdiff extension is lower than 1.5.0' );
  13                         return;
  14                 }
  15         }
  16
  17         /**
  18          * @dataProvider provideXdiffAdler32
  19          * @covers DiffHistoryBlob::xdiffAdler32
  20          */
  21         public function testXdiffAdler32( $input ) {
  22                 $xdiffHash = substr( xdiff_string_rabdiff( $input, '' ), 0, 4 );
  23                 $dhb = new DiffHistoryBlob;
  24                 $myHash = $dhb->xdiffAdler32( $input );
  25                 $this->assertSame( bin2hex( $xdiffHash ), bin2hex( $myHash ),
  26                         "Hash of " . addcslashes( $input, "\0..\37!@\@\177..\377" ) );
  27         }
  28
  29         public function provideXdiffAdler32() {
  30                 // Hack non-empty early return since PHPUnit expands this provider before running
  31                 // the setUp() which marks the test as skipped.
  32                 if ( !function_exists( 'xdiff_string_rabdiff' ) ) {
  33                         return [ [ '', 'Empty string' ] ];
  34                 }
  35
  36                 return [
  37                         [ '', 'Empty string' ],
  38                         [ "\0", 'Null' ],
  39                         [ "\0\0\0", "Several nulls" ],
  40                         [ "Hello", "An ASCII string" ],
  41                         [ str_repeat( "x", 6000 ), "A string larger than xdiff's NMAX (5552)" ]
  42                 ];
  43         }
  44 }