PrefixSearchTest.php

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<?php
class PrefixSearchTest extends MediaWikiLangTestCase {
    const NS_NONCAP = 12346;

    private $originalHandlers;

    public function addDBDataOnce() {
        if ( !$this->isWikitextNS( NS_MAIN ) ) {
            // tests are skipped if NS_MAIN is not wikitext
            return;
        }

        $this->insertPage( 'Sandbox' );
        $this->insertPage( 'Bar' );
        $this->insertPage( 'Example' );
        $this->insertPage( 'Example Bar' );
        $this->insertPage( 'Example Foo' );
        $this->insertPage( 'Example Foo/Bar' );
        $this->insertPage( 'Example/Baz' );
        $this->insertPage( 'Redirect test', '#REDIRECT [[Redirect Test]]' );
        $this->insertPage( 'Redirect Test' );
        $this->insertPage( 'Redirect Test Worse Result' );
        $this->insertPage( 'Redirect test2', '#REDIRECT [[Redirect Test2]]' );
        $this->insertPage( 'Redirect TEST2', '#REDIRECT [[Redirect Test2]]' );
        $this->insertPage( 'Redirect Test2' );
        $this->insertPage( 'Redirect Test2 Worse Result' );

        $this->insertPage( 'Talk:Sandbox' );
        $this->insertPage( 'Talk:Example' );

        $this->insertPage( 'User:Example' );

        $this->insertPage( Title::makeTitle( self::NS_NONCAP, 'Bar' ) );
        $this->insertPage( Title::makeTitle( self::NS_NONCAP, 'Upper' ) );
        $this->insertPage( Title::makeTitle( self::NS_NONCAP, 'sandbox' ) );
    }

    protected function setUp() {
        parent::setUp();

        if ( !$this->isWikitextNS( NS_MAIN ) ) {
            $this->markTestSkipped( 'Main namespace does not support wikitext.' );
        }

        // Avoid special pages from extensions interferring with the tests
        $this->setMwGlobals( [
            'wgSpecialPages' => [],
            'wgHooks' => [],
            'wgExtraNamespaces' => [ self::NS_NONCAP => 'NonCap' ],
            'wgCapitalLinkOverrides' => [ self::NS_NONCAP => false ],
        ] );

        $this->originalHandlers = TestingAccessWrapper::newFromClass( 'Hooks' )->handlers;
        TestingAccessWrapper::newFromClass( 'Hooks' )->handlers = [];

        // Clear caches so that our new namespace appears
        MWNamespace::getCanonicalNamespaces( true );
        Language::factory( 'en' )->resetNamespaces();

        SpecialPageFactory::resetList();
    }

    public function tearDown() {
        parent::tearDown();

        TestingAccessWrapper::newFromClass( 'Hooks' )->handlers = $this->originalHandlers;

        SpecialPageFactory::resetList();
    }

    protected function searchProvision( array $results = null ) {
        if ( $results === null ) {
            $this->setMwGlobals( 'wgHooks', [] );
        } else {
            $this->setMwGlobals( 'wgHooks', [
                'PrefixSearchBackend' => [
                    function ( $namespaces, $search, $limit, &$srchres ) use ( $results ) {
                        $srchres = $results;
                        return false;
                    }
                ],
            ] );
        }
    }

    public static function provideSearch() {
        return [
            [ [
                'Empty string',
                'query' => '',
                'results' => [],
            ] ],
            [ [
                'Main namespace with title prefix',
                'query' => 'Ex',
                'results' => [
                    'Example',
                    'Example/Baz',
                    'Example Bar',
                ],
                // Third result when testing offset
                'offsetresult' => [
                    'Example Foo',
                ],
            ] ],
            [ [
                'Talk namespace prefix',
                'query' => 'Talk:',
                'results' => [
                    'Talk:Example',
                    'Talk:Sandbox',
                ],
            ] ],
            [ [
                'User namespace prefix',
                'query' => 'User:',
                'results' => [
                    'User:Example',
                ],
            ] ],
            [ [
                'Special namespace prefix',
                'query' => 'Special:',
                'results' => [
                    'Special:ActiveUsers',
                    'Special:AllMessages',
                    'Special:AllMyFiles',
                ],
                // Third result when testing offset
                'offsetresult' => [
                    'Special:AllMyUploads',
                ],
            ] ],
            [ [
                'Special namespace with prefix',
                'query' => 'Special:Un',
                'results' => [
                    'Special:Unblock',
                    'Special:UncategorizedCategories',
                    'Special:UncategorizedFiles',
                ],
                // Third result when testing offset
                'offsetresult' => [
                    'Special:UncategorizedImages',
                ],
            ] ],
            [ [
                'Special page name',
                'query' => 'Special:EditWatchlist',
                'results' => [
                    'Special:EditWatchlist',
                ],
            ] ],
            [ [
                'Special page subpages',
                'query' => 'Special:EditWatchlist/',
                'results' => [
                    'Special:EditWatchlist/clear',
                    'Special:EditWatchlist/raw',
                ],
            ] ],
            [ [
                'Special page subpages with prefix',
                'query' => 'Special:EditWatchlist/cl',
                'results' => [
                    'Special:EditWatchlist/clear',
                ],
            ] ],
            [ [
                'Namespace with case sensitive first letter',
                'query' => 'NonCap:upper',
                'results' => []
            ] ],
            [ [
                'Multinamespace search',
                'query' => 'B',
                'results' => [
                    'Bar',
                    'NonCap:Bar',
                ],
                'namespaces' => [ NS_MAIN, self::NS_NONCAP ],
            ] ],
            [ [
                'Multinamespace search with lowercase first letter',
                'query' => 'sand',
                'results' => [
                    'Sandbox',
                    'NonCap:sandbox',
                ],
                'namespaces' => [ NS_MAIN, self::NS_NONCAP ],
            ] ],
        ];
    }

    public function testSearch( array $case ) {
        $this->searchProvision( null );

        $namespaces = isset( $case['namespaces'] ) ? $case['namespaces'] : [];

        $searcher = new StringPrefixSearch;
        $results = $searcher->search( $case['query'], 3, $namespaces );
        $this->assertEquals(
            $case['results'],
            $results,
            $case[0]
        );
    }

    public function testSearchWithOffset( array $case ) {
        $this->searchProvision( null );

        $namespaces = isset( $case['namespaces'] ) ? $case['namespaces'] : [];

        $searcher = new StringPrefixSearch;
        $results = $searcher->search( $case['query'], 3, $namespaces, 1 );

        // We don't expect the first result when offsetting
        array_shift( $case['results'] );
        // And sometimes we expect a different last result
        $expected = isset( $case['offsetresult'] ) ?
            array_merge( $case['results'], $case['offsetresult'] ) :
            $case['results'];

        $this->assertEquals(
            $expected,
            $results,
            $case[0]
        );
    }

    public static function provideSearchBackend() {
        return [
            [ [
                'Simple case',
                'provision' => [
                    'Bar',
                    'Barcelona',
                    'Barbara',
                ],
                'query' => 'Bar',
                'results' => [
                    'Bar',
                    'Barcelona',
                    'Barbara',
                ],
            ] ],
            [ [
                'Exact match not on top (bug 70958)',
                'provision' => [
                    'Barcelona',
                    'Bar',
                    'Barbara',
                ],
                'query' => 'Bar',
                'results' => [
                    'Bar',
                    'Barcelona',
                    'Barbara',
                ],
            ] ],
            [ [
                'Exact match missing (bug 70958)',
                'provision' => [
                    'Barcelona',
                    'Barbara',
                    'Bart',
                ],
                'query' => 'Bar',
                'results' => [
                    'Bar',
                    'Barcelona',
                    'Barbara',
                ],
            ] ],
            [ [
                'Exact match missing and not existing',
                'provision' => [
                    'Exile',
                    'Exist',
                    'External',
                ],
                'query' => 'Ex',
                'results' => [
                    'Exile',
                    'Exist',
                    'External',
                ],
            ] ],
            [ [
                "Exact match shouldn't override already found match if " .
                    "exact is redirect and found isn't",
                'provision' => [
                    // Target of the exact match is low in the list
                    'Redirect Test Worse Result',
                    'Redirect Test',
                ],
                'query' => 'redirect test',
                'results' => [
                    // Redirect target is pulled up and exact match isn't added
                    'Redirect Test',
                    'Redirect Test Worse Result',
                ],
            ] ],
            [ [
                "Exact match shouldn't override already found match if " .
                    "both exact match and found match are redirect",
                'provision' => [
                    // Another redirect to the same target as the exact match
                    // is low in the list
                    'Redirect Test2 Worse Result',
                    'Redirect test2',
                ],
                'query' => 'redirect TEST2',
                'results' => [
                    // Found redirect is pulled to the top and exact match isn't
                    // added
                    'Redirect test2',
                    'Redirect Test2 Worse Result',
                ],
            ] ],
            [ [
                "Exact match should override any already found matches that " .
                    "are redirects to it",
                'provision' => [
                    // Another redirect to the same target as the exact match
                    // is low in the list
                    'Redirect Test Worse Result',
                    'Redirect test',
                ],
                'query' => 'Redirect Test',
                'results' => [
                    // Found redirect is pulled to the top and exact match isn't
                    // added
                    'Redirect Test',
                    'Redirect Test Worse Result',
                ],
            ] ],
        ];
    }

    public function testSearchBackend( array $case ) {
        $this->searchProvision( $case['provision'] );
        $searcher = new StringPrefixSearch;
        $results = $searcher->search( $case['query'], 3 );
        $this->assertEquals(
            $case['results'],
            $results,
            $case[0]
        );
    }
}