DatabaseMysqlBaseTest.php

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<?php
class FakeDatabaseMysqlBase extends DatabaseMysqlBase {
    // From DatabaseBase
    function __construct() {
    }

    protected function closeConnection() {
    }

    protected function doQuery( $sql ) {
    }

    // From DatabaseMysql
    protected function mysqlConnect( $realServer ) {
    }

    protected function mysqlSetCharset( $charset ) {
    }

    protected function mysqlFreeResult( $res ) {
    }

    protected function mysqlFetchObject( $res ) {
    }

    protected function mysqlFetchArray( $res ) {
    }

    protected function mysqlNumRows( $res ) {
    }

    protected function mysqlNumFields( $res ) {
    }

    protected function mysqlFieldName( $res, $n ) {
    }

    protected function mysqlFieldType( $res, $n ) {
    }

    protected function mysqlDataSeek( $res, $row ) {
    }

    protected function mysqlError( $conn = null ) {
    }

    protected function mysqlFetchField( $res, $n ) {
    }

    protected function mysqlPing() {
    }

    protected function mysqlRealEscapeString( $s ) {

    }

    // From interface DatabaseType
    function insertId() {
    }

    function lastErrno() {
    }

    function affectedRows() {
    }

    function getServerVersion() {
    }
}

class DatabaseMysqlBaseTest extends MediaWikiTestCase {
    public function testAddIdentifierQuotes( $expected, $in ) {
        $db = new FakeDatabaseMysqlBase();
        $quoted = $db->addIdentifierQuotes( $in );
        $this->assertEquals( $expected, $quoted );
    }

    function provideDiapers() {
        return [
            // Format: expected, input
            [ '``', '' ],

            // Yeah I really hate loosely typed PHP idiocies nowadays
            [ '``', null ],

            // Dear codereviewer, guess what addIdentifierQuotes()
            // will return with thoses:
            [ '``', false ],
            [ '`1`', true ],

            // We never know what could happen
            [ '`0`', 0 ],
            [ '`1`', 1 ],

            // Whatchout! Should probably use something more meaningful
            [ "`'`", "'" ],  # single quote
            [ '`"`', '"' ],  # double quote
            [ '````', '`' ], # backtick
            [ '`’`', '’' ],  # apostrophe (look at your encyclopedia)

            // sneaky NUL bytes are lurking everywhere
            [ '``', "\0" ],
            [ '`xyzzy`', "\0x\0y\0z\0z\0y\0" ],

            // unicode chars
            [
                self::createUnicodeString( '`\u0001a\uFFFFb`' ),
                self::createUnicodeString( '\u0001a\uFFFFb' )
            ],
            [
                self::createUnicodeString( '`\u0001\uFFFF`' ),
                self::createUnicodeString( '\u0001\u0000\uFFFF\u0000' )
            ],
            [ '`☃`', '☃' ],
            [ '`メインページ`', 'メインページ' ],
            [ '`Басты_бет`', 'Басты_бет' ],

            // Real world:
            [ '`Alix`', 'Alix' ],  # while( ! $recovered ) { sleep(); }
            [ '`Backtick: ```', 'Backtick: `' ],
            [ '`This is a test`', 'This is a test' ],
        ];
    }

    private static function createUnicodeString( $str ) {
        return json_decode( '"' . $str . '"' );
    }

    function getMockForViews() {
        $db = $this->getMockBuilder( 'DatabaseMysql' )
            ->disableOriginalConstructor()
            ->setMethods( [ 'fetchRow', 'query' ] )
            ->getMock();

        $db->expects( $this->any() )
            ->method( 'query' )
            ->with( $this->anything() )
            ->will(
                $this->returnValue( null )
            );

        $db->expects( $this->any() )
            ->method( 'fetchRow' )
            ->with( $this->anything() )
            ->will( $this->onConsecutiveCalls(
                [ 'Tables_in_' => 'view1' ],
                [ 'Tables_in_' => 'view2' ],
                [ 'Tables_in_' => 'myview' ],
                false  # no more rows
            ) );
        return $db;
    }
    function testListviews() {
        $db = $this->getMockForViews();

        // The first call populate an internal cache of views
        $this->assertEquals( [ 'view1', 'view2', 'myview' ],
            $db->listViews() );
        $this->assertEquals( [ 'view1', 'view2', 'myview' ],
            $db->listViews() );

        // Prefix filtering
        $this->assertEquals( [ 'view1', 'view2' ],
            $db->listViews( 'view' ) );
        $this->assertEquals( [ 'myview' ],
            $db->listViews( 'my' ) );
        $this->assertEquals( [],
            $db->listViews( 'UNUSED_PREFIX' ) );
        $this->assertEquals( [ 'view1', 'view2', 'myview' ],
            $db->listViews( '' ) );
    }

    function testIsView( $isView, $viewName ) {
        $db = $this->getMockForViews();

        switch ( $isView ) {
            case true:
                $this->assertTrue( $db->isView( $viewName ),
                    "$viewName should be considered a view" );
            break;

            case false:
                $this->assertFalse( $db->isView( $viewName ),
                    "$viewName has not been defined as a view" );
            break;
        }

    }

    function provideViewExistanceChecks() {
        return [
            // format: whether it is a view, view name
            [ true, 'view1' ],
            [ true, 'view2' ],
            [ true, 'myview' ],

            [ false, 'user' ],

            [ false, 'view10' ],
            [ false, 'my' ],
            [ false, 'OH_MY_GOD' ],  # they killed kenny!
        ];
    }

    function testHasReached( MySQLMasterPos $lowerPos, MySQLMasterPos $higherPos ) {
        $this->assertTrue( $higherPos->hasReached( $lowerPos ) );
        $this->assertTrue( $higherPos->hasReached( $higherPos ) );
        $this->assertTrue( $lowerPos->hasReached( $lowerPos ) );
        $this->assertFalse( $lowerPos->hasReached( $higherPos ) );
    }

    function provideComparePositions() {
        return [
            [
                new MySQLMasterPos( 'db1034-bin.000976', '843431247' ),
                new MySQLMasterPos( 'db1034-bin.000976', '843431248' )
            ],
            [
                new MySQLMasterPos( 'db1034-bin.000976', '999' ),
                new MySQLMasterPos( 'db1034-bin.000976', '1000' )
            ],
            [
                new MySQLMasterPos( 'db1034-bin.000976', '999' ),
                new MySQLMasterPos( 'db1035-bin.000976', '1000' )
            ],
        ];
    }

    function testChannelsMatch( MySQLMasterPos $pos1, MySQLMasterPos $pos2, $matches ) {
        $this->assertEquals( $matches, $pos1->channelsMatch( $pos2 ) );
        $this->assertEquals( $matches, $pos2->channelsMatch( $pos1 ) );
    }

    function provideChannelPositions() {
        return [
            [
                new MySQLMasterPos( 'db1034-bin.000876', '44' ),
                new MySQLMasterPos( 'db1034-bin.000976', '74' ),
                true
            ],
            [
                new MySQLMasterPos( 'db1052-bin.000976', '999' ),
                new MySQLMasterPos( 'db1052-bin.000976', '1000' ),
                true
            ],
            [
                new MySQLMasterPos( 'db1066-bin.000976', '9999' ),
                new MySQLMasterPos( 'db1035-bin.000976', '10000' ),
                false
            ],
            [
                new MySQLMasterPos( 'db1066-bin.000976', '9999' ),
                new MySQLMasterPos( 'trump2016.000976', '10000' ),
                false
            ],
        ];
    }

    function testPtHeartbeat( $lag ) {
        $db = $this->getMockBuilder( 'DatabaseMysql' )
            ->disableOriginalConstructor()
            ->setMethods( [
                'getLagDetectionMethod', 'getHeartbeatData', 'getMasterServerInfo' ] )
            ->getMock();

        $db->expects( $this->any() )
            ->method( 'getLagDetectionMethod' )
            ->will( $this->returnValue( 'pt-heartbeat' ) );

        $db->expects( $this->any() )
            ->method( 'getMasterServerInfo' )
            ->will( $this->returnValue( [ 'serverId' => 172, 'asOf' => time() ] ) );

        // Fake the current time.
        list( $nowSecFrac, $nowSec ) = explode( ' ', microtime() );
        $now = (float)$nowSec + (float)$nowSecFrac;
        // Fake the heartbeat time.
        // Work arounds for weak DataTime microseconds support.
        $ptTime = $now - $lag;
        $ptSec = (int)$ptTime;
        $ptSecFrac = ( $ptTime - $ptSec );
        $ptDateTime = new DateTime( "@$ptSec" );
        $ptTimeISO = $ptDateTime->format( 'Y-m-d\TH:i:s' );
        $ptTimeISO .= ltrim( number_format( $ptSecFrac, 6 ), '0' );

        $db->expects( $this->any() )
            ->method( 'getHeartbeatData' )
            ->with( [ 'server_id' => 172 ] )
            ->will( $this->returnValue( [ $ptTimeISO, $now ] ) );

        $db->setLBInfo( 'clusterMasterHost', 'db1052' );
        $lagEst = $db->getLag();

        $this->assertGreaterThan( $lag - .010, $lagEst, "Correct heatbeat lag" );
        $this->assertLessThan( $lag + .010, $lagEst, "Correct heatbeat lag" );
    }

    function provideLagAmounts() {
        return [
            [ 0 ],
            [ 0.3 ],
            [ 6.5 ],
            [ 10.1 ],
            [ 200.2 ],
            [ 400.7 ],
            [ 600.22 ],
            [ 1000.77 ],
        ];
    }
}