CollationTest.php

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<?php

class CollationTest extends MediaWikiLangTestCase {
    protected function setUp() {
        parent::setUp();
        $this->checkPHPExtension( 'intl' );
    }

    public function testIsPrefix( $lang, $base, $extended ) {
        $cp = Collator::create( $lang );
        $cp->setStrength( Collator::PRIMARY );
        $baseBin = $cp->getSortKey( $base );
        // Remove sortkey terminator
        $baseBin = rtrim( $baseBin, "\0" );
        $extendedBin = $cp->getSortKey( $extended );
        $this->assertStringStartsWith( $baseBin, $extendedBin, "$base is not a prefix of $extended" );
    }

    public static function prefixDataProvider() {
        return [
            [ 'en', 'A', 'AA' ],
            [ 'en', 'A', 'AAA' ],
            [ 'en', 'Д', 'ДЂ' ],
            [ 'en', 'Д', 'ДA' ],
            // 'Ʒ' should expand to 'Z ' (note space).
            [ 'fi', 'Z', 'Ʒ' ],
            // 'Þ' should expand to 'th'
            [ 'sv', 't', 'Þ' ],
            // Javanese is a limited use alphabet, so should have 3 bytes
            // per character, so do some tests with it.
            [ 'en', 'ꦲ', 'ꦲꦤ' ],
            [ 'en', 'ꦲ', 'ꦲД' ],
            [ 'en', 'A', 'Aꦲ' ],
        ];
    }

    public function testNotIsPrefix( $lang, $base, $extended ) {
        $cp = Collator::create( $lang );
        $cp->setStrength( Collator::PRIMARY );
        $baseBin = $cp->getSortKey( $base );
        // Remove sortkey terminator
        $baseBin = rtrim( $baseBin, "\0" );
        $extendedBin = $cp->getSortKey( $extended );
        $this->assertStringStartsNotWith( $baseBin, $extendedBin, "$base is a prefix of $extended" );
    }

    public static function notPrefixDataProvider() {
        return [
            [ 'en', 'A', 'B' ],
            [ 'en', 'AC', 'ABC' ],
            [ 'en', 'Z', 'Ʒ' ],
            [ 'en', 'A', 'ꦲ' ],
        ];
    }

    public function testGetFirstLetter( $collation, $string, $firstLetter ) {
        $col = Collation::factory( $collation );
        $this->assertEquals( $firstLetter, $col->getFirstLetter( $string ) );
    }

    function firstLetterProvider() {
        return [
            [ 'uppercase', 'Abc', 'A' ],
            [ 'uppercase', 'abc', 'A' ],
            [ 'identity', 'abc', 'a' ],
            [ 'uca-en', 'abc', 'A' ],
            [ 'uca-en', ' ', ' ' ],
            [ 'uca-en', 'Êveryone', 'E' ],
            [ 'uca-vi', 'Êveryone', 'Ê' ],
            // Make sure thorn is not a first letter.
            [ 'uca-sv', 'The', 'T' ],
            [ 'uca-sv', 'Å', 'Å' ],
            [ 'uca-hu', 'dzsdo', 'Dzs' ],
            [ 'uca-hu', 'dzdso', 'Dz' ],
            [ 'uca-hu', 'CSD', 'Cs' ],
            [ 'uca-root', 'CSD', 'C' ],
            [ 'uca-fi', 'Ǥ', 'G' ],
            [ 'uca-fi', 'Ŧ', 'T' ],
            [ 'uca-fi', 'Ʒ', 'Z' ],
            [ 'uca-fi', 'Ŋ', 'N' ],
        ];
    }
}