+<?php
+
+class DiffHistoryBlobTest extends MediaWikiTestCase {
+ function setUp() {
+ if ( !extension_loaded( 'xdiff' ) ) {
+ $this->markTestSkipped( 'The xdiff extension is not available' );
+ return;
+ }
+ if ( !extension_loaded( 'hash' ) && !extension_loaded( 'mhash' ) ) {
+ $this->markTestSkipped( 'Neither the hash nor mhash extension is available' );
+ return;
+ }
+ }
+
+ /**
+ * Test for DiffHistoryBlob::xdiffAdler32()
+ * @dataProvider provideXdiffAdler32
+ */
+ 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" ) );
+ }
+
+ function provideXdiffAdler32() {
+ return array(
+ array( '', 'Empty string' ),
+ array( "\0", 'Null' ),
+ array( "\0\0\0", "Several nulls" ),
+ array( "Hello", "An ASCII string" ),
+ array( str_repeat( "x", 6000 ), "A string larger than xdiff's NMAX (5552)" )
+ );
+ }
+}