CdbTest.php

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<?php

class CdbTest extends MediaWikiTestCase {

    protected function setUp() {
        parent::setUp();
        if ( !CdbReader::haveExtension() ) {
            $this->markTestSkipped( 'Native CDB support is not available' );
        }
    }

    public function testCdb() {
        $dir = wfTempDir();
        if ( !is_writable( $dir ) ) {
            $this->markTestSkipped( "Temp dir isn't writable" );
        }

        $phpcdbfile = $this->getNewTempFile();
        $dbacdbfile = $this->getNewTempFile();

        $w1 = new CdbWriterPHP( $phpcdbfile );
        $w2 = new CdbWriterDBA( $dbacdbfile );

        $data = array();
        for ( $i = 0; $i < 1000; $i++ ) {
            $key = $this->randomString();
            $value = $this->randomString();
            $w1->set( $key, $value );
            $w2->set( $key, $value );

            if ( !isset( $data[$key] ) ) {
                $data[$key] = $value;
            }
        }

        $w1->close();
        $w2->close();

        $this->assertEquals(
            md5_file( $phpcdbfile ),
            md5_file( $dbacdbfile ),
            'same hash'
        );

        $r1 = new CdbReaderPHP( $phpcdbfile );
        $r2 = new CdbReaderDBA( $dbacdbfile );

        foreach ( $data as $key => $value ) {
            if ( $key === '' ) {
                // Known bug
                continue;
            }
            $v1 = $r1->get( $key );
            $v2 = $r2->get( $key );

            $v1 = $v1 === false ? '(not found)' : $v1;
            $v2 = $v2 === false ? '(not found)' : $v2;

            # cdbAssert( 'Mismatch', $key, $v1, $v2 );
            $this->cdbAssert( "PHP error", $key, $v1, $value );
            $this->cdbAssert( "DBA error", $key, $v2, $value );
        }
    }

    private function randomString() {
        $len = mt_rand( 0, 10 );
        $s = '';
        for ( $j = 0; $j < $len; $j++ ) {
            $s .= chr( mt_rand( 0, 255 ) );
        }

        return $s;
    }

    private function cdbAssert( $msg, $key, $v1, $v2 ) {
        $this->assertEquals(
            $v2,
            $v1,
            $msg . ', k=' . bin2hex( $key )
        );
    }
}