DiffHistoryBlobTest.php
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DiffHistoryBlobTest.php
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	<?php

	/**
	* @requires extension xdiff
	*/
	class DiffHistoryBlobTest extends MediaWikiUnitTestCase {
	/**
	* @dataProvider provideXdiffAdler32
	* @covers \DiffHistoryBlob::xdiffAdler32
	*/
	public function testXdiffAdler32( $input ) {
	$xdiffHash = substr( xdiff_string_rabdiff( $input, '' ), 0, 4 );
	$dhb = new DiffHistoryBlob;
	$myHash = $dhb->xdiffAdler32( $input );
	$this->assertSame( bin2hex( $xdiffHash ), bin2hex( $myHash ),
	"Hash of " . addcslashes( $input, "\0..\37!@\@\177..\377" ) );
	}

	public static function provideXdiffAdler32() {
	return [
	[ '', 'Empty string' ],
	[ "\0", 'Null' ],
	[ "\0\0\0", "Several nulls" ],
	[ "Hello", "An ASCII string" ],
	[ str_repeat( "x", 6000 ), "A string larger than xdiff's NMAX (5552)" ]
	];
	}
	}