0318d7cd43
Otherwise the ScrambleMapping constructor throws an exception. Change-Id: I47a947639e0968bbee4d706ec081e5f7af390f26
34 lines
1.1 KiB
PHP
34 lines
1.1 KiB
PHP
<?php
|
|
|
|
namespace MediaWiki\Tests\User\TempUser;
|
|
|
|
use MediaWiki\User\TempUser\ScrambleMapping;
|
|
use PHPUnit\Framework\TestCase;
|
|
|
|
/**
|
|
* @covers \MediaWiki\User\TempUser\ScrambleMapping
|
|
*/
|
|
class ScrambleMappingTest extends TestCase {
|
|
public function testMap() {
|
|
if ( !extension_loaded( 'gmp' ) && !extension_loaded( 'bcmath' ) ) {
|
|
$this->markTestSkipped( 'need extension gmp or bcmath' );
|
|
}
|
|
$map = new ScrambleMapping( [] );
|
|
$duplicates = 0;
|
|
// This has been verified up to 1e8 but for CI purposes we will use 200
|
|
$n = 200;
|
|
// Make a bit array for duplicate detection, with enough space for one extra digit
|
|
$bitArray = str_repeat( "\0", $n * 10 / 8 );
|
|
for ( $i = 0; $i < $n; $i++ ) {
|
|
$value = (int)$map->getSerialIdForIndex( $i );
|
|
$minor = $value % 8;
|
|
$major = ( $value - $minor ) / 8;
|
|
$prevBits = ord( $bitArray[$major] );
|
|
$prevStatus = ( $prevBits & ( 1 << $minor ) );
|
|
$duplicates += ( $prevStatus ? 1 : 0 );
|
|
$newBits = $prevBits | ( 1 << $minor );
|
|
$bitArray[$major] = chr( $newBits );
|
|
}
|
|
$this->assertSame( 0, $duplicates, 'duplicate detected' );
|
|
}
|
|
}
|