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<?php
class DiffHistoryBlobTest extends MediaWikiTestCase {
protected function setUp() {
parent::setUp();
$this->checkPHPExtension( 'hash' );
$this->checkPHPExtension( 'xdiff' );
if ( !function_exists( 'xdiff_string_rabdiff' ) ) {
$this->markTestSkipped( 'The version of xdiff extension is lower than 1.5.0' );
return;
}
}
/**
* Test for DiffHistoryBlob::xdiffAdler32()
* @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 function provideXdiffAdler32() {
// Hack non-empty early return since PHPUnit expands this provider before running
// the setUp() which marks the test as skipped.
if ( !function_exists( 'xdiff_string_rabdiff' ) ) {
return [ [ '', 'Empty string' ] ];
}
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)" ]
];
}
}
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