LanguageTest.php

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<?php

class LanguageTest extends LanguageClassesTestCase {
    public function testLanguageConvertDoubleWidthToSingleWidth() {
        $this->assertEquals(
            "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
            $this->getLang()->normalizeForSearch(
                "０１２３４５６７８９ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ"
            ),
            'convertDoubleWidth() with the full alphabet and digits'
        );
    }

    public function testFormatTimePeriod( $seconds, $format, $expected, $desc ) {
        $this->assertEquals( $expected, $this->getLang()->formatTimePeriod( $seconds, $format ), $desc );
    }

    public static function provideFormattableTimes() {
        return [
            [
                9.45,
                [],
                '9.5 s',
                'formatTimePeriod() rounding (<10s)'
            ],
            [
                9.45,
                [ 'noabbrevs' => true ],
                '9.5 seconds',
                'formatTimePeriod() rounding (<10s)'
            ],
            [
                9.95,
                [],
                '10 s',
                'formatTimePeriod() rounding (<10s)'
            ],
            [
                9.95,
                [ 'noabbrevs' => true ],
                '10 seconds',
                'formatTimePeriod() rounding (<10s)'
            ],
            [
                59.55,
                [],
                '1 min 0 s',
                'formatTimePeriod() rounding (<60s)'
            ],
            [
                59.55,
                [ 'noabbrevs' => true ],
                '1 minute 0 seconds',
                'formatTimePeriod() rounding (<60s)'
            ],
            [
                119.55,
                [],
                '2 min 0 s',
                'formatTimePeriod() rounding (<1h)'
            ],
            [
                119.55,
                [ 'noabbrevs' => true ],
                '2 minutes 0 seconds',
                'formatTimePeriod() rounding (<1h)'
            ],
            [
                3599.55,
                [],
                '1 h 0 min 0 s',
                'formatTimePeriod() rounding (<1h)'
            ],
            [
                3599.55,
                [ 'noabbrevs' => true ],
                '1 hour 0 minutes 0 seconds',
                'formatTimePeriod() rounding (<1h)'
            ],
            [
                7199.55,
                [],
                '2 h 0 min 0 s',
                'formatTimePeriod() rounding (>=1h)'
            ],
            [
                7199.55,
                [ 'noabbrevs' => true ],
                '2 hours 0 minutes 0 seconds',
                'formatTimePeriod() rounding (>=1h)'
            ],
            [
                7199.55,
                'avoidseconds',
                '2 h 0 min',
                'formatTimePeriod() rounding (>=1h), avoidseconds'
            ],
            [
                7199.55,
                [ 'avoid' => 'avoidseconds', 'noabbrevs' => true ],
                '2 hours 0 minutes',
                'formatTimePeriod() rounding (>=1h), avoidseconds'
            ],
            [
                7199.55,
                'avoidminutes',
                '2 h 0 min',
                'formatTimePeriod() rounding (>=1h), avoidminutes'
            ],
            [
                7199.55,
                [ 'avoid' => 'avoidminutes', 'noabbrevs' => true ],
                '2 hours 0 minutes',
                'formatTimePeriod() rounding (>=1h), avoidminutes'
            ],
            [
                172799.55,
                'avoidseconds',
                '48 h 0 min',
                'formatTimePeriod() rounding (=48h), avoidseconds'
            ],
            [
                172799.55,
                [ 'avoid' => 'avoidseconds', 'noabbrevs' => true ],
                '48 hours 0 minutes',
                'formatTimePeriod() rounding (=48h), avoidseconds'
            ],
            [
                259199.55,
                'avoidminutes',
                '3 d 0 h',
                'formatTimePeriod() rounding (>48h), avoidminutes'
            ],
            [
                259199.55,
                [ 'avoid' => 'avoidminutes', 'noabbrevs' => true ],
                '3 days 0 hours',
                'formatTimePeriod() rounding (>48h), avoidminutes'
            ],
            [
                176399.55,
                'avoidseconds',
                '2 d 1 h 0 min',
                'formatTimePeriod() rounding (>48h), avoidseconds'
            ],
            [
                176399.55,
                [ 'avoid' => 'avoidseconds', 'noabbrevs' => true ],
                '2 days 1 hour 0 minutes',
                'formatTimePeriod() rounding (>48h), avoidseconds'
            ],
            [
                176399.55,
                'avoidminutes',
                '2 d 1 h',
                'formatTimePeriod() rounding (>48h), avoidminutes'
            ],
            [
                176399.55,
                [ 'avoid' => 'avoidminutes', 'noabbrevs' => true ],
                '2 days 1 hour',
                'formatTimePeriod() rounding (>48h), avoidminutes'
            ],
            [
                259199.55,
                'avoidseconds',
                '3 d 0 h 0 min',
                'formatTimePeriod() rounding (>48h), avoidseconds'
            ],
            [
                259199.55,
                [ 'avoid' => 'avoidseconds', 'noabbrevs' => true ],
                '3 days 0 hours 0 minutes',
                'formatTimePeriod() rounding (>48h), avoidseconds'
            ],
            [
                172801.55,
                'avoidseconds',
                '2 d 0 h 0 min',
                'formatTimePeriod() rounding, (>48h), avoidseconds'
            ],
            [
                172801.55,
                [ 'avoid' => 'avoidseconds', 'noabbrevs' => true ],
                '2 days 0 hours 0 minutes',
                'formatTimePeriod() rounding, (>48h), avoidseconds'
            ],
            [
                176460.55,
                [],
                '2 d 1 h 1 min 1 s',
                'formatTimePeriod() rounding, recursion, (>48h)'
            ],
            [
                176460.55,
                [ 'noabbrevs' => true ],
                '2 days 1 hour 1 minute 1 second',
                'formatTimePeriod() rounding, recursion, (>48h)'
            ],
        ];
    }

    public function testTruncate() {
        $this->assertEquals(
            "XXX",
            $this->getLang()->truncate( "1234567890", 0, 'XXX' ),
            'truncate prefix, len 0, small ellipsis'
        );

        $this->assertEquals(
            "12345XXX",
            $this->getLang()->truncate( "1234567890", 8, 'XXX' ),
            'truncate prefix, small ellipsis'
        );

        $this->assertEquals(
            "123456789",
            $this->getLang()->truncate( "123456789", 5, 'XXXXXXXXXXXXXXX' ),
            'truncate prefix, large ellipsis'
        );

        $this->assertEquals(
            "XXX67890",
            $this->getLang()->truncate( "1234567890", -8, 'XXX' ),
            'truncate suffix, small ellipsis'
        );

        $this->assertEquals(
            "123456789",
            $this->getLang()->truncate( "123456789", -5, 'XXXXXXXXXXXXXXX' ),
            'truncate suffix, large ellipsis'
        );
        $this->assertEquals(
            "123XXX",
            $this->getLang()->truncate( "123                ", 9, 'XXX' ),
            'truncate prefix, with spaces'
        );
        $this->assertEquals(
            "12345XXX",
            $this->getLang()->truncate( "12345            8", 11, 'XXX' ),
            'truncate prefix, with spaces and non-space ending'
        );
        $this->assertEquals(
            "XXX234",
            $this->getLang()->truncate( "1              234", -8, 'XXX' ),
            'truncate suffix, with spaces'
        );
        $this->assertEquals(
            "12345XXX",
            $this->getLang()->truncate( "1234567890", 5, 'XXX', false ),
            'truncate without adjustment'
        );
        $this->assertEquals(
            "泰乐菌...",
            $this->getLang()->truncate( "泰乐菌素123456789", 11, '...', false ),
            'truncate does not chop Unicode characters in half'
        );
        $this->assertEquals(
            "\n泰乐菌...",
            $this->getLang()->truncate( "\n泰乐菌素123456789", 12, '...', false ),
            'truncate does not chop Unicode characters in half if there is a preceding newline'
        );
    }

    public function testTruncateHtml( $len, $ellipsis, $input, $expected ) {
        // Actual HTML...
        $this->assertEquals(
            $expected,
            $this->getLang()->truncateHtml( $input, $len, $ellipsis )
        );
    }

    public static function provideHTMLTruncateData() {
        return [
            [ 0, 'XXX', "1234567890", "XXX" ],
            [ 8, 'XXX', "1234567890", "12345XXX" ],
            [ 5, 'XXXXXXXXXXXXXXX', '1234567890', "1234567890" ],
            [ 2, '***',
                '<p><span style="font-weight:bold;"></span></p>',
                '<p><span style="font-weight:bold;"></span></p>',
            ],
            [ 2, '***',
                '<p><span style="font-weight:bold;">123456789</span></p>',
                '<p><span style="font-weight:bold;">***</span></p>',
            ],
            [ 2, '***',
                '<p><span style="font-weight:bold;">&nbsp;23456789</span></p>',
                '<p><span style="font-weight:bold;">***</span></p>',
            ],
            [ 3, '***',
                '<p><span style="font-weight:bold;">123456789</span></p>',
                '<p><span style="font-weight:bold;">***</span></p>',
            ],
            [ 4, '***',
                '<p><span style="font-weight:bold;">123456789</span></p>',
                '<p><span style="font-weight:bold;">1***</span></p>',
            ],
            [ 5, '***',
                '<tt><span style="font-weight:bold;">123456789</span></tt>',
                '<tt><span style="font-weight:bold;">12***</span></tt>',
            ],
            [ 6, '***',
                '<p><a href="www.mediawiki.org">123456789</a></p>',
                '<p><a href="www.mediawiki.org">123***</a></p>',
            ],
            [ 6, '***',
                '<p><a href="www.mediawiki.org">12&nbsp;456789</a></p>',
                '<p><a href="www.mediawiki.org">12&nbsp;***</a></p>',
            ],
            [ 7, '***',
                '<small><span style="font-weight:bold;">123<p id="#moo">456</p>789</span></small>',
                '<small><span style="font-weight:bold;">123<p id="#moo">4***</p></span></small>',
            ],
            [ 8, '***',
                '<div><span style="font-weight:bold;">123<span>4</span>56789</span></div>',
                '<div><span style="font-weight:bold;">123<span>4</span>5***</span></div>',
            ],
            [ 9, '***',
                '<p><table style="font-weight:bold;"><tr><td>123456789</td></tr></table></p>',
                '<p><table style="font-weight:bold;"><tr><td>123456789</td></tr></table></p>',
            ],
            [ 10, '***',
                '<p><font style="font-weight:bold;">123456789</font></p>',
                '<p><font style="font-weight:bold;">123456789</font></p>',
            ],
        ];
    }

    public function testWellFormedLanguageTag( $code, $message = '' ) {
        $this->assertTrue(
            Language::isWellFormedLanguageTag( $code ),
            "validating code $code $message"
        );
    }

    public static function provideWellFormedLanguageTags() {
        return [
            [ 'fr', 'two-letter code' ],
            [ 'fr-latn', 'two-letter code with lower case script code' ],
            [ 'fr-Latn-FR', 'two-letter code with title case script code and uppercase country code' ],
            [ 'fr-Latn-419', 'two-letter code with title case script code and region number' ],
            [ 'fr-FR', 'two-letter code with uppercase' ],
            [ 'ax-TZ', 'Not in the registry, but well-formed' ],
            [ 'fr-shadok', 'two-letter code with variant' ],
            [ 'fr-y-myext-myext2', 'non-x singleton' ],
            [ 'fra-Latn', 'ISO 639 can be 3-letters' ],
            [ 'fra', 'three-letter language code' ],
            [ 'fra-FX', 'three-letter language code with country code' ],
            [ 'i-klingon', 'grandfathered with singleton' ],
            [ 'I-kLINgon', 'tags are case-insensitive...' ],
            [ 'no-bok', 'grandfathered without singleton' ],
            [ 'i-enochian', 'Grandfathered' ],
            [ 'x-fr-CH', 'private use' ],
            [ 'es-419', 'two-letter code with region number' ],
            [ 'en-Latn-GB-boont-r-extended-sequence-x-private', 'weird, but well-formed' ],
            [ 'ab-x-abc-x-abc', 'anything goes after x' ],
            [ 'ab-x-abc-a-a', 'anything goes after x, including several non-x singletons' ],
            [ 'i-default', 'grandfathered' ],
            [ 'abcd-Latn', 'Language of 4 chars reserved for future use' ],
            [ 'AaBbCcDd-x-y-any-x', 'Language of 5-8 chars, registered' ],
            [ 'de-CH-1901', 'with country and year' ],
            [ 'en-US-x-twain', 'with country and singleton' ],
            [ 'zh-cmn', 'three-letter variant' ],
            [ 'zh-cmn-Hant', 'three-letter variant and script' ],
            [ 'zh-cmn-Hant-HK', 'three-letter variant, script and country' ],
            [ 'xr-p-lze', 'Extension' ],
        ];
    }

    public function testMalformedLanguageTag( $code, $message = '' ) {
        $this->assertFalse(
            Language::isWellFormedLanguageTag( $code ),
            "validating that code $code is a malformed language tag - $message"
        );
    }

    public static function provideMalformedLanguageTags() {
        return [
            [ 'f', 'language too short' ],
            [ 'f-Latn', 'language too short with script' ],
            [ 'xr-lxs-qut', 'variants too short' ], # extlangS
            [ 'fr-Latn-F', 'region too short' ],
            [ 'a-value', 'language too short with region' ],
            [ 'tlh-a-b-foo', 'valid three-letter with wrong variant' ],
            [
                'i-notexist',
                'grandfathered but not registered: invalid, even if we only test well-formedness'
            ],
            [ 'abcdefghi-012345678', 'numbers too long' ],
            [ 'ab-abc-abc-abc-abc', 'invalid extensions' ],
            [ 'ab-abcd-abc', 'invalid extensions' ],
            [ 'ab-ab-abc', 'invalid extensions' ],
            [ 'ab-123-abc', 'invalid extensions' ],
            [ 'a-Hant-ZH', 'short language with valid extensions' ],
            [ 'a1-Hant-ZH', 'invalid character in language' ],
            [ 'ab-abcde-abc', 'invalid extensions' ],
            [ 'ab-1abc-abc', 'invalid characters in extensions' ],
            [ 'ab-ab-abcd', 'invalid order of extensions' ],
            [ 'ab-123-abcd', 'invalid order of extensions' ],
            [ 'ab-abcde-abcd', 'invalid extensions' ],
            [ 'ab-1abc-abcd', 'invalid characters in extensions' ],
            [ 'ab-a-b', 'extensions too short' ],
            [ 'ab-a-x', 'extensions too short, even with singleton' ],
            [ 'ab--ab', 'two separators' ],
            [ 'ab-abc-', 'separator in the end' ],
            [ '-ab-abc', 'separator in the beginning' ],
            [ 'abcd-efg', 'language too long' ],
            [ 'aabbccddE', 'tag too long' ],
            [ 'pa_guru', 'A tag with underscore is invalid in strict mode' ],
            [ 'de-f', 'subtag too short' ],
        ];
    }

    public function testLenientLanguageTag() {
        $this->assertTrue(
            Language::isWellFormedLanguageTag( 'pa_guru', true ),
            'pa_guru is a well-formed language tag in lenient mode'
        );
    }

    public function testBuiltInCodeValidation( $code, $expected, $message = '' ) {
        $this->assertEquals( $expected,
            (bool)Language::isValidBuiltInCode( $code ),
            "validating code $code $message"
        );
    }

    public static function provideLanguageCodes() {
        return [
            [ 'fr', true, 'Two letters, minor case' ],
            [ 'EN', false, 'Two letters, upper case' ],
            [ 'tyv', true, 'Three letters' ],
            [ 'tokipona', true, 'long language code' ],
            [ 'be-tarask', true, 'With dash' ],
            [ 'be-x-old', true, 'With extension (two dashes)' ],
            [ 'be_tarask', false, 'Reject underscores' ],
        ];
    }

    public function testKnownLanguageTag( $code, $message = '' ) {
        $this->assertTrue(
            (bool)Language::isKnownLanguageTag( $code ),
            "validating code $code - $message"
        );
    }

    public static function provideKnownLanguageTags() {
        return [
            [ 'fr', 'simple code' ],
            [ 'bat-smg', 'an MW legacy tag' ],
            [ 'sgs', 'an internal standard MW name, for which a legacy tag is used externally' ],
        ];
    }

    public function testKnownCldrLanguageTag() {
        if ( !class_exists( 'LanguageNames' ) ) {
            $this->markTestSkipped( 'The LanguageNames class is not available. '
                . 'The CLDR extension is probably not installed.' );
        }

        $this->assertTrue(
            (bool)Language::isKnownLanguageTag( 'pal' ),
            'validating code "pal" an ancient language, which probably will '
                . 'not appear in Names.php, but appears in CLDR in English'
        );
    }

    public function testUnknownLanguageTag( $code, $message = '' ) {
        $this->assertFalse(
            (bool)Language::isKnownLanguageTag( $code ),
            "checking that code $code is invalid - $message"
        );
    }

    public static function provideUnknownLanguageTags() {
        return [
            [ 'mw', 'non-existent two-letter code' ],
            [ 'foo"<bar', 'very invalid language code' ],
        ];
    }

    public function testSprintfDateTooShortTimestamp() {
        $this->getLang()->sprintfDate( 'xiY', '1234567890123' );
    }

    public function testSprintfDateTooLongTimestamp() {
        $this->getLang()->sprintfDate( 'xiY', '123456789012345' );
    }

    public function testSprintfDateNotAllDigitTimestamp() {
        $this->getLang()->sprintfDate( 'xiY', '-1234567890123' );
    }

    public function testSprintfDate( $format, $ts, $expected, $msg ) {
        $ttl = null;
        $this->assertEquals(
            $expected,
            $this->getLang()->sprintfDate( $format, $ts, null, $ttl ),
            "sprintfDate('$format', '$ts'): $msg"
        );
        if ( $ttl ) {
            $dt = new DateTime( $ts );
            $lastValidTS = $dt->add( new DateInterval( 'PT' . ( $ttl - 1 ) . 'S' ) )->format( 'YmdHis' );
            $this->assertEquals(
                $expected,
                $this->getLang()->sprintfDate( $format, $lastValidTS, null ),
                "sprintfDate('$format', '$ts'): TTL $ttl too high (output was different at $lastValidTS)"
            );
        } else {
            // advance the time enough to make all of the possible outputs different (except possibly L)
            $dt = new DateTime( $ts );
            $newTS = $dt->add( new DateInterval( 'P1Y1M8DT13H1M1S' ) )->format( 'YmdHis' );
            $this->assertEquals(
                $expected,
                $this->getLang()->sprintfDate( $format, $newTS, null ),
                "sprintfDate('$format', '$ts'): Missing TTL (output was different at $newTS)"
            );
        }
    }

    public function testSprintfDateNoZone( $format, $ts, $expected, $ignore, $msg ) {
        $oldTZ = date_default_timezone_get();
        $res = date_default_timezone_set( 'Asia/Seoul' );
        if ( !$res ) {
            $this->markTestSkipped( "Error setting Timezone" );
        }

        $this->assertEquals(
            $expected,
            $this->getLang()->sprintfDate( $format, $ts ),
            "sprintfDate('$format', '$ts'): $msg"
        );

        date_default_timezone_set( $oldTZ );
    }

    public function testSprintfDateTZ( $format, $ts, $ignore, $expected, $msg ) {
        $tz = new DateTimeZone( 'Asia/Seoul' );
        if ( !$tz ) {
            $this->markTestSkipped( "Error getting Timezone" );
        }

        $this->assertEquals(
            $expected,
            $this->getLang()->sprintfDate( $format, $ts, $tz ),
            "sprintfDate('$format', '$ts', 'Asia/Seoul'): $msg"
        );
    }

    public function testSprintfDateNoTtlIfNotNeeded() {
        $noTtl = 'unused'; // Value used to represent that the caller didn't pass a variable in.
        $ttl = null;
        $this->getLang()->sprintfDate( 'YmdHis', wfTimestampNow(), null, $noTtl );
        $this->getLang()->sprintfDate( 'YmdHis', wfTimestampNow(), null, $ttl );

        $this->assertSame(
            'unused',
            $noTtl,
            'If the caller does not set the $ttl variable, do not compute it.'
        );
        $this->assertInternalType( 'int', $ttl, 'TTL should have been computed.' );
    }

    public static function provideSprintfDateSamples() {
        return [
            [
                'xiY',
                '20111212000000',
                '1390', // note because we're testing English locale we get Latin-standard digits
                '1390',
                'Iranian calendar full year'
            ],
            [
                'xiy',
                '20111212000000',
                '90',
                '90',
                'Iranian calendar short year'
            ],
            [
                'o',
                '20120101235000',
                '2011',
                '2011',
                'ISO 8601 (week) year'
            ],
            [
                'W',
                '20120101235000',
                '52',
                '52',
                'Week number'
            ],
            [
                'W',
                '20120102235000',
                '1',
                '1',
                'Week number'
            ],
            [
                'o-\\WW-N',
                '20091231235000',
                '2009-W53-4',
                '2009-W53-4',
                'leap week'
            ],
            // What follows is mostly copied from
            // https://www.mediawiki.org/wiki/Help:Extension:ParserFunctions#.23time
            [
                'Y',
                '20120102090705',
                '2012',
                '2012',
                'Full year'
            ],
            [
                'y',
                '20120102090705',
                '12',
                '12',
                '2 digit year'
            ],
            [
                'L',
                '20120102090705',
                '1',
                '1',
                'Leap year'
            ],
            [
                'n',
                '20120102090705',
                '1',
                '1',
                'Month index, not zero pad'
            ],
            [
                'N',
                '20120102090705',
                '01',
                '01',
                'Month index. Zero pad'
            ],
            [
                'M',
                '20120102090705',
                'Jan',
                'Jan',
                'Month abbrev'
            ],
            [
                'F',
                '20120102090705',
                'January',
                'January',
                'Full month'
            ],
            [
                'xg',
                '20120102090705',
                'January',
                'January',
                'Genitive month name (same in EN)'
            ],
            [
                'j',
                '20120102090705',
                '2',
                '2',
                'Day of month (not zero pad)'
            ],
            [
                'd',
                '20120102090705',
                '02',
                '02',
                'Day of month (zero-pad)'
            ],
            [
                'z',
                '20120102090705',
                '1',
                '1',
                'Day of year (zero-indexed)'
            ],
            [
                'D',
                '20120102090705',
                'Mon',
                'Mon',
                'Day of week (abbrev)'
            ],
            [
                'l',
                '20120102090705',
                'Monday',
                'Monday',
                'Full day of week'
            ],
            [
                'N',
                '20120101090705',
                '7',
                '7',
                'Day of week (Mon=1, Sun=7)'
            ],
            [
                'w',
                '20120101090705',
                '0',
                '0',
                'Day of week (Sun=0, Sat=6)'
            ],
            [
                'N',
                '20120102090705',
                '1',
                '1',
                'Day of week'
            ],
            [
                'a',
                '20120102090705',
                'am',
                'am',
                'am vs pm'
            ],
            [
                'A',
                '20120102120000',
                'PM',
                'PM',
                'AM vs PM'
            ],
            [
                'a',
                '20120102000000',
                'am',
                'am',
                'AM vs PM'
            ],
            [
                'g',
                '20120102090705',
                '9',
                '9',
                '12 hour, not Zero'
            ],
            [
                'h',
                '20120102090705',
                '09',
                '09',
                '12 hour, zero padded'
            ],
            [
                'G',
                '20120102090705',
                '9',
                '9',
                '24 hour, not zero'
            ],
            [
                'H',
                '20120102090705',
                '09',
                '09',
                '24 hour, zero'
            ],
            [
                'H',
                '20120102110705',
                '11',
                '11',
                '24 hour, zero'
            ],
            [
                'i',
                '20120102090705',
                '07',
                '07',
                'Minutes'
            ],
            [
                's',
                '20120102090705',
                '05',
                '05',
                'seconds'
            ],
            [
                'U',
                '20120102090705',
                '1325495225',
                '1325462825',
                'unix time'
            ],
            [
                't',
                '20120102090705',
                '31',
                '31',
                'Days in current month'
            ],
            [
                'c',
                '20120102090705',
                '2012-01-02T09:07:05+00:00',
                '2012-01-02T09:07:05+09:00',
                'ISO 8601 timestamp'
            ],
            [
                'r',
                '20120102090705',
                'Mon, 02 Jan 2012 09:07:05 +0000',
                'Mon, 02 Jan 2012 09:07:05 +0900',
                'RFC 5322'
            ],
            [
                'e',
                '20120102090705',
                'UTC',
                'Asia/Seoul',
                'Timezone identifier'
            ],
            [
                'I',
                '19880602090705',
                '0',
                '1',
                'DST indicator'
            ],
            [
                'O',
                '20120102090705',
                '+0000',
                '+0900',
                'Timezone offset'
            ],
            [
                'P',
                '20120102090705',
                '+00:00',
                '+09:00',
                'Timezone offset with colon'
            ],
            [
                'T',
                '20120102090705',
                'UTC',
                'KST',
                'Timezone abbreviation'
            ],
            [
                'Z',
                '20120102090705',
                '0',
                '32400',
                'Timezone offset in seconds'
            ],
            [
                'xmj xmF xmn xmY',
                '20120102090705',
                '7 Safar 2 1433',
                '7 Safar 2 1433',
                'Islamic'
            ],
            [
                'xij xiF xin xiY',
                '20120102090705',
                '12 Dey 10 1390',
                '12 Dey 10 1390',
                'Iranian'
            ],
            [
                'xjj xjF xjn xjY',
                '20120102090705',
                '7 Tevet 4 5772',
                '7 Tevet 4 5772',
                'Hebrew'
            ],
            [
                'xjt',
                '20120102090705',
                '29',
                '29',
                'Hebrew number of days in month'
            ],
            [
                'xjx',
                '20120102090705',
                'Tevet',
                'Tevet',
                'Hebrew genitive month name (No difference in EN)'
            ],
            [
                'xkY',
                '20120102090705',
                '2555',
                '2555',
                'Thai year'
            ],
            [
                'xoY',
                '20120102090705',
                '101',
                '101',
                'Minguo'
            ],
            [
                'xtY',
                '20120102090705',
                '平成24',
                '平成24',
                'nengo'
            ],
            [
                'xrxkYY',
                '20120102090705',
                'MMDLV2012',
                'MMDLV2012',
                'Roman numerals'
            ],
            [
                'xhxjYY',
                '20120102090705',
                'ה\'תשע"ב2012',
                'ה\'תשע"ב2012',
                'Hebrew numberals'
            ],
            [
                'xnY',
                '20120102090705',
                '2012',
                '2012',
                'Raw numerals (doesn\'t mean much in EN)'
            ],
            [
                '[[Y "(yea"\\r)]] \\"xx\\"',
                '20120102090705',
                '[[2012 (year)]] "x"',
                '[[2012 (year)]] "x"',
                'Various escaping'
            ],

        ];
    }

    public function testFormatSize( $size, $expected, $msg ) {
        $this->assertEquals(
            $expected,
            $this->getLang()->formatSize( $size ),
            "formatSize('$size'): $msg"
        );
    }

    public static function provideFormatSizes() {
        return [
            [
                0,
                "0 bytes",
                "Zero bytes"
            ],
            [
                1024,
                "1 KB",
                "1 kilobyte"
            ],
            [
                1024 * 1024,
                "1 MB",
                "1,024 megabytes"
            ],
            [
                1024 * 1024 * 1024,
                "1 GB",
                "1 gigabyte"
            ],
            [
                pow( 1024, 4 ),
                "1 TB",
                "1 terabyte"
            ],
            [
                pow( 1024, 5 ),
                "1 PB",
                "1 petabyte"
            ],
            [
                pow( 1024, 6 ),
                "1 EB",
                "1,024 exabyte"
            ],
            [
                pow( 1024, 7 ),
                "1 ZB",
                "1 zetabyte"
            ],
            [
                pow( 1024, 8 ),
                "1 YB",
                "1 yottabyte"
            ],
            // How big!? THIS BIG!
        ];
    }

    public function testFormatBitrate( $bps, $expected, $msg ) {
        $this->assertEquals(
            $expected,
            $this->getLang()->formatBitrate( $bps ),
            "formatBitrate('$bps'): $msg"
        );
    }

    public static function provideFormatBitrate() {
        return [
            [
                0,
                "0 bps",
                "0 bits per second"
            ],
            [
                999,
                "999 bps",
                "999 bits per second"
            ],
            [
                1000,
                "1 kbps",
                "1 kilobit per second"
            ],
            [
                1000 * 1000,
                "1 Mbps",
                "1 megabit per second"
            ],
            [
                pow( 10, 9 ),
                "1 Gbps",
                "1 gigabit per second"
            ],
            [
                pow( 10, 12 ),
                "1 Tbps",
                "1 terabit per second"
            ],
            [
                pow( 10, 15 ),
                "1 Pbps",
                "1 petabit per second"
            ],
            [
                pow( 10, 18 ),
                "1 Ebps",
                "1 exabit per second"
            ],
            [
                pow( 10, 21 ),
                "1 Zbps",
                "1 zetabit per second"
            ],
            [
                pow( 10, 24 ),
                "1 Ybps",
                "1 yottabit per second"
            ],
            [
                pow( 10, 27 ),
                "1,000 Ybps",
                "1,000 yottabits per second"
            ],
        ];
    }

    public function testFormatDuration( $duration, $expected, $intervals = [] ) {
        $this->assertEquals(
            $expected,
            $this->getLang()->formatDuration( $duration, $intervals ),
            "formatDuration('$duration'): $expected"
        );
    }

    public static function provideFormatDuration() {
        return [
            [
                0,
                '0 seconds',
            ],
            [
                1,
                '1 second',
            ],
            [
                2,
                '2 seconds',
            ],
            [
                60,
                '1 minute',
            ],
            [
                2 * 60,
                '2 minutes',
            ],
            [
                3600,
                '1 hour',
            ],
            [
                2 * 3600,
                '2 hours',
            ],
            [
                24 * 3600,
                '1 day',
            ],
            [
                2 * 86400,
                '2 days',
            ],
            [
                // ( 365 + ( 24 * 3 + 25 ) / 400 ) * 86400 = 31556952
                ( 365 + ( 24 * 3 + 25 ) / 400.0 ) * 86400,
                '1 year',
            ],
            [
                2 * 31556952,
                '2 years',
            ],
            [
                10 * 31556952,
                '1 decade',
            ],
            [
                20 * 31556952,
                '2 decades',
            ],
            [
                100 * 31556952,
                '1 century',
            ],
            [
                200 * 31556952,
                '2 centuries',
            ],
            [
                1000 * 31556952,
                '1 millennium',
            ],
            [
                2000 * 31556952,
                '2 millennia',
            ],
            [
                9001,
                '2 hours, 30 minutes and 1 second'
            ],
            [
                3601,
                '1 hour and 1 second'
            ],
            [
                31556952 + 2 * 86400 + 9000,
                '1 year, 2 days, 2 hours and 30 minutes'
            ],
            [
                42 * 1000 * 31556952 + 42,
                '42 millennia and 42 seconds'
            ],
            [
                60,
                '60 seconds',
                [ 'seconds' ],
            ],
            [
                61,
                '61 seconds',
                [ 'seconds' ],
            ],
            [
                1,
                '1 second',
                [ 'seconds' ],
            ],
            [
                31556952 + 2 * 86400 + 9000,
                '1 year, 2 days and 150 minutes',
                [ 'years', 'days', 'minutes' ],
            ],
            [
                42,
                '0 days',
                [ 'years', 'days' ],
            ],
            [
                31556952 + 2 * 86400 + 9000,
                '1 year, 2 days and 150 minutes',
                [ 'minutes', 'days', 'years' ],
            ],
            [
                42,
                '0 days',
                [ 'days', 'years' ],
            ],
        ];
    }

    public function testCheckTitleEncoding( $s ) {
        $this->assertEquals(
            $s,
            $this->getLang()->checkTitleEncoding( $s ),
            "checkTitleEncoding('$s')"
        );
    }

    public static function provideCheckTitleEncodingData() {
        // @codingStandardsIgnoreStart Ignore Generic.Files.LineLength.TooLong
        return [
            [ "" ],
            [ "United States of America" ], // 7bit ASCII
            [ rawurldecode( "S%C3%A9rie%20t%C3%A9l%C3%A9vis%C3%A9e" ) ],
            [
                rawurldecode(
                    "Acteur%7CAlbert%20Robbins%7CAnglais%7CAnn%20Donahue%7CAnthony%20E.%20Zuiker%7CCarol%20Mendelsohn"
                )
            ],
            // The following two data sets come from bug 36839. They fail if checkTitleEncoding uses a regexp to test for
            // valid UTF-8 encoding and the pcre.recursion_limit is low (like, say, 1024). They succeed if checkTitleEncoding
            // uses mb_check_encoding for its test.
            [
                rawurldecode(
                    "Acteur%7CAlbert%20Robbins%7CAnglais%7CAnn%20Donahue%7CAnthony%20E.%20Zuiker%7CCarol%20Mendelsohn%7C"
                        . "Catherine%20Willows%7CDavid%20Hodges%7CDavid%20Phillips%7CGil%20Grissom%7CGreg%20Sanders%7CHodges%7C"
                        . "Internet%20Movie%20Database%7CJim%20Brass%7CLady%20Heather%7C"
                        . "Les%20Experts%20(s%C3%A9rie%20t%C3%A9l%C3%A9vis%C3%A9e)%7CLes%20Experts%20:%20Manhattan%7C"
                        . "Les%20Experts%20:%20Miami%7CListe%20des%20personnages%20des%20Experts%7C"
                        . "Liste%20des%20%C3%A9pisodes%20des%20Experts%7CMod%C3%A8le%20discussion:Palette%20Les%20Experts%7C"
                        . "Nick%20Stokes%7CPersonnage%20de%20fiction%7CPersonnage%20fictif%7CPersonnage%20de%20fiction%7C"
                        . "Personnages%20r%C3%A9currents%20dans%20Les%20Experts%7CRaymond%20Langston%7CRiley%20Adams%7C"
                        . "Saison%201%20des%20Experts%7CSaison%2010%20des%20Experts%7CSaison%2011%20des%20Experts%7C"
                        . "Saison%2012%20des%20Experts%7CSaison%202%20des%20Experts%7CSaison%203%20des%20Experts%7C"
                        . "Saison%204%20des%20Experts%7CSaison%205%20des%20Experts%7CSaison%206%20des%20Experts%7C"
                        . "Saison%207%20des%20Experts%7CSaison%208%20des%20Experts%7CSaison%209%20des%20Experts%7C"
                        . "Sara%20Sidle%7CSofia%20Curtis%7CS%C3%A9rie%20t%C3%A9l%C3%A9vis%C3%A9e%7CWallace%20Langham%7C"
                        . "Warrick%20Brown%7CWendy%20Simms%7C%C3%89tats-Unis"
                ),
            ],
            [
                rawurldecode(
                    "Mod%C3%A8le%3AArrondissements%20homonymes%7CMod%C3%A8le%3ABandeau%20standard%20pour%20page%20d'homonymie%7C"
                        . "Mod%C3%A8le%3ABatailles%20homonymes%7CMod%C3%A8le%3ACantons%20homonymes%7C"
                        . "Mod%C3%A8le%3ACommunes%20fran%C3%A7aises%20homonymes%7CMod%C3%A8le%3AFilms%20homonymes%7C"
                        . "Mod%C3%A8le%3AGouvernements%20homonymes%7CMod%C3%A8le%3AGuerres%20homonymes%7CMod%C3%A8le%3AHomonymie%7C"
                        . "Mod%C3%A8le%3AHomonymie%20bateau%7CMod%C3%A8le%3AHomonymie%20d'%C3%A9tablissements%20scolaires%20ou"
                        . "%20universitaires%7CMod%C3%A8le%3AHomonymie%20d'%C3%AEles%7CMod%C3%A8le%3AHomonymie%20de%20clubs%20sportifs%7C"
                        . "Mod%C3%A8le%3AHomonymie%20de%20comt%C3%A9s%7CMod%C3%A8le%3AHomonymie%20de%20monument%7C"
                        . "Mod%C3%A8le%3AHomonymie%20de%20nom%20romain%7CMod%C3%A8le%3AHomonymie%20de%20parti%20politique%7C"
                        . "Mod%C3%A8le%3AHomonymie%20de%20route%7CMod%C3%A8le%3AHomonymie%20dynastique%7C"
                        . "Mod%C3%A8le%3AHomonymie%20vid%C3%A9oludique%7CMod%C3%A8le%3AHomonymie%20%C3%A9difice%20religieux%7C"
                        . "Mod%C3%A8le%3AInternationalisation%7CMod%C3%A8le%3AIsom%C3%A9rie%7CMod%C3%A8le%3AParonymie%7C"
                        . "Mod%C3%A8le%3APatronyme%7CMod%C3%A8le%3APatronyme%20basque%7CMod%C3%A8le%3APatronyme%20italien%7C"
                        . "Mod%C3%A8le%3APatronymie%7CMod%C3%A8le%3APersonnes%20homonymes%7CMod%C3%A8le%3ASaints%20homonymes%7C"
                        . "Mod%C3%A8le%3ATitres%20homonymes%7CMod%C3%A8le%3AToponymie%7CMod%C3%A8le%3AUnit%C3%A9s%20homonymes%7C"
                        . "Mod%C3%A8le%3AVilles%20homonymes%7CMod%C3%A8le%3A%C3%89difices%20religieux%20homonymes"
                )
            ]
        ];
        // @codingStandardsIgnoreEnd
    }

    public function testRomanNumerals( $num, $numerals ) {
        $this->assertEquals(
            $numerals,
            Language::romanNumeral( $num ),
            "romanNumeral('$num')"
        );
    }

    public static function provideRomanNumeralsData() {
        return [
            [ 1, 'I' ],
            [ 2, 'II' ],
            [ 3, 'III' ],
            [ 4, 'IV' ],
            [ 5, 'V' ],
            [ 6, 'VI' ],
            [ 7, 'VII' ],
            [ 8, 'VIII' ],
            [ 9, 'IX' ],
            [ 10, 'X' ],
            [ 20, 'XX' ],
            [ 30, 'XXX' ],
            [ 40, 'XL' ],
            [ 49, 'XLIX' ],
            [ 50, 'L' ],
            [ 60, 'LX' ],
            [ 70, 'LXX' ],
            [ 80, 'LXXX' ],
            [ 90, 'XC' ],
            [ 99, 'XCIX' ],
            [ 100, 'C' ],
            [ 200, 'CC' ],
            [ 300, 'CCC' ],
            [ 400, 'CD' ],
            [ 500, 'D' ],
            [ 600, 'DC' ],
            [ 700, 'DCC' ],
            [ 800, 'DCCC' ],
            [ 900, 'CM' ],
            [ 999, 'CMXCIX' ],
            [ 1000, 'M' ],
            [ 1989, 'MCMLXXXIX' ],
            [ 2000, 'MM' ],
            [ 3000, 'MMM' ],
            [ 4000, 'MMMM' ],
            [ 5000, 'MMMMM' ],
            [ 6000, 'MMMMMM' ],
            [ 7000, 'MMMMMMM' ],
            [ 8000, 'MMMMMMMM' ],
            [ 9000, 'MMMMMMMMM' ],
            [ 9999, 'MMMMMMMMMCMXCIX' ],
            [ 10000, 'MMMMMMMMMM' ],
        ];
    }

    public function testHebrewNumeral( $num, $numerals ) {
        $this->assertEquals(
            $numerals,
            Language::hebrewNumeral( $num ),
            "hebrewNumeral('$num')"
        );
    }

    public static function provideHebrewNumeralsData() {
        return [
            [ -1, -1 ],
            [ 0, 0 ],
            [ 1, "א'" ],
            [ 2, "ב'" ],
            [ 3, "ג'" ],
            [ 4, "ד'" ],
            [ 5, "ה'" ],
            [ 6, "ו'" ],
            [ 7, "ז'" ],
            [ 8, "ח'" ],
            [ 9, "ט'" ],
            [ 10, "י'" ],
            [ 11, 'י"א' ],
            [ 14, 'י"ד' ],
            [ 15, 'ט"ו' ],
            [ 16, 'ט"ז' ],
            [ 17, 'י"ז' ],
            [ 20, "כ'" ],
            [ 21, 'כ"א' ],
            [ 30, "ל'" ],
            [ 40, "מ'" ],
            [ 50, "נ'" ],
            [ 60, "ס'" ],
            [ 70, "ע'" ],
            [ 80, "פ'" ],
            [ 90, "צ'" ],
            [ 99, 'צ"ט' ],
            [ 100, "ק'" ],
            [ 101, 'ק"א' ],
            [ 110, 'ק"י' ],
            [ 200, "ר'" ],
            [ 300, "ש'" ],
            [ 400, "ת'" ],
            [ 500, 'ת"ק' ],
            [ 800, 'ת"ת' ],
            [ 1000, "א' אלף" ],
            [ 1001, "א'א'" ],
            [ 1012, "א'י\"ב" ],
            [ 1020, "א'ך'" ],
            [ 1030, "א'ל'" ],
            [ 1081, "א'פ\"א" ],
            [ 2000, "ב' אלפים" ],
            [ 2016, "ב'ט\"ז" ],
            [ 3000, "ג' אלפים" ],
            [ 4000, "ד' אלפים" ],
            [ 4904, "ד'תתק\"ד" ],
            [ 5000, "ה' אלפים" ],
            [ 5680, "ה'תר\"ף" ],
            [ 5690, "ה'תר\"ץ" ],
            [ 5708, "ה'תש\"ח" ],
            [ 5720, "ה'תש\"ך" ],
            [ 5740, "ה'תש\"ם" ],
            [ 5750, "ה'תש\"ן" ],
            [ 5775, "ה'תשע\"ה" ],
        ];
    }

    public function testConvertPlural( $expected, $number, $forms ) {
        $chosen = $this->getLang()->convertPlural( $number, $forms );
        $this->assertEquals( $expected, $chosen );
    }

    public static function providePluralData() {
        // Params are: [expected text, number given, [the plural forms]]
        return [
            [ 'plural', 0, [
                'singular', 'plural'
            ] ],
            [ 'explicit zero', 0, [
                '0=explicit zero', 'singular', 'plural'
            ] ],
            [ 'explicit one', 1, [
                'singular', 'plural', '1=explicit one',
            ] ],
            [ 'singular', 1, [
                'singular', 'plural', '0=explicit zero',
            ] ],
            [ 'plural', 3, [
                '0=explicit zero', '1=explicit one', 'singular', 'plural'
            ] ],
            [ 'explicit eleven', 11, [
                'singular', 'plural', '11=explicit eleven',
            ] ],
            [ 'plural', 12, [
                'singular', 'plural', '11=explicit twelve',
            ] ],
            [ 'plural', 12, [
                'singular', 'plural', '=explicit form',
            ] ],
            [ 'other', 2, [
                'kissa=kala', '1=2=3', 'other',
            ] ],
            [ '', 2, [
                '0=explicit zero', '1=explicit one',
            ] ],
        ];
    }

    public function testEmbedBidi() {
        $lre = "\xE2\x80\xAA"; // U+202A LEFT-TO-RIGHT EMBEDDING
        $rle = "\xE2\x80\xAB"; // U+202B RIGHT-TO-LEFT EMBEDDING
        $pdf = "\xE2\x80\xAC"; // U+202C POP DIRECTIONAL FORMATTING
        $lang = $this->getLang();
        $this->assertEquals(
            '123',
            $lang->embedBidi( '123' ),
            'embedBidi with neutral argument'
        );
        $this->assertEquals(
            $lre . 'Ben_(WMF)' . $pdf,
            $lang->embedBidi( 'Ben_(WMF)' ),
            'embedBidi with LTR argument'
        );
        $this->assertEquals(
            $rle . 'יהודי (מנוחין)' . $pdf,
            $lang->embedBidi( 'יהודי (מנוחין)' ),
            'embedBidi with RTL argument'
        );
    }

    public function testTranslateBlockExpiry( $expectedData, $str, $desc ) {
        $lang = $this->getLang();
        if ( is_array( $expectedData ) ) {
            list( $func, $arg ) = $expectedData;
            $expected = $lang->$func( $arg );
        } else {
            $expected = $expectedData;
        }
        $this->assertEquals( $expected, $lang->translateBlockExpiry( $str ), $desc );
    }

    public static function provideTranslateBlockExpiry() {
        return [
            [ '2 hours', '2 hours', 'simple data from ipboptions' ],
            [ 'indefinite', 'infinite', 'infinite from ipboptions' ],
            [ 'indefinite', 'infinity', 'alternative infinite from ipboptions' ],
            [ 'indefinite', 'indefinite', 'another alternative infinite from ipboptions' ],
            [ [ 'formatDuration', 1023 * 60 * 60 ], '1023 hours', 'relative' ],
            [ [ 'formatDuration', -1023 ], '-1023 seconds', 'negative relative' ],
            [ [ 'formatDuration', 0 ], 'now', 'now' ],
            [
                [ 'timeanddate', '20120102070000' ],
                '2012-1-1 7:00 +1 day',
                'mixed, handled as absolute'
            ],
            [ [ 'timeanddate', '19910203040506' ], '1991-2-3 4:05:06', 'absolute' ],
            [ [ 'timeanddate', '19700101000000' ], '1970-1-1 0:00:00', 'absolute at epoch' ],
            [ [ 'timeanddate', '19691231235959' ], '1969-12-31 23:59:59', 'time before epoch' ],
            [ 'dummy', 'dummy', 'return garbage as is' ],
        ];
    }

    public function testParseFormattedNumber( $langCode, $number ) {
        $lang = Language::factory( $langCode );

        $localisedNum = $lang->formatNum( $number );
        $normalisedNum = $lang->parseFormattedNumber( $localisedNum );

        $this->assertEquals( $number, $normalisedNum );
    }

    public function parseFormattedNumberProvider() {
        return [
            [ 'de', 377.01 ],
            [ 'fa', 334 ],
            [ 'fa', 382.772 ],
            [ 'ar', 1844 ],
            [ 'lzh', 3731 ],
            [ 'zh-classical', 7432 ]
        ];
    }

    public function testCommafy( $number, $numbersWithCommas ) {
        $this->assertEquals(
            $numbersWithCommas,
            $this->getLang()->commafy( $number ),
            "commafy('$number')"
        );
    }

    public static function provideCommafyData() {
        return [
            [ -1, '-1' ],
            [ 10, '10' ],
            [ 100, '100' ],
            [ 1000, '1,000' ],
            [ 10000, '10,000' ],
            [ 100000, '100,000' ],
            [ 1000000, '1,000,000' ],
            [ -1.0001, '-1.0001' ],
            [ 1.0001, '1.0001' ],
            [ 10.0001, '10.0001' ],
            [ 100.0001, '100.0001' ],
            [ 1000.0001, '1,000.0001' ],
            [ 10000.0001, '10,000.0001' ],
            [ 100000.0001, '100,000.0001' ],
            [ 1000000.0001, '1,000,000.0001' ],
            [ '200000000000000000000', '200,000,000,000,000,000,000' ],
            [ '-200000000000000000000', '-200,000,000,000,000,000,000' ],
        ];
    }

    public function testListToText() {
        $lang = $this->getLang();
        $and = $lang->getMessageFromDB( 'and' );
        $s = $lang->getMessageFromDB( 'word-separator' );
        $c = $lang->getMessageFromDB( 'comma-separator' );

        $this->assertEquals( '', $lang->listToText( [] ) );
        $this->assertEquals( 'a', $lang->listToText( [ 'a' ] ) );
        $this->assertEquals( "a{$and}{$s}b", $lang->listToText( [ 'a', 'b' ] ) );
        $this->assertEquals( "a{$c}b{$and}{$s}c", $lang->listToText( [ 'a', 'b', 'c' ] ) );
        $this->assertEquals( "a{$c}b{$c}c{$and}{$s}d", $lang->listToText( [ 'a', 'b', 'c', 'd' ] ) );
    }

    public function testIsSupportedLanguage( $code, $expected, $comment ) {
        $this->assertEquals( $expected, Language::isSupportedLanguage( $code ), $comment );
    }

    public static function provideIsSupportedLanguage() {
        return [
            [ 'en', true, 'is supported language' ],
            [ 'fi', true, 'is supported language' ],
            [ 'bunny', false, 'is not supported language' ],
            [ 'FI', false, 'is not supported language, input should be in lower case' ],
        ];
    }

    public function testGetParentLanguage( $code, $expected, $comment ) {
        $lang = Language::factory( $code );
        if ( is_null( $expected ) ) {
            $this->assertNull( $lang->getParentLanguage(), $comment );
        } else {
            $this->assertEquals( $expected, $lang->getParentLanguage()->getCode(), $comment );
        }
    }

    public static function provideGetParentLanguage() {
        return [
            [ 'zh-cn', 'zh', 'zh is the parent language of zh-cn' ],
            [ 'zh', 'zh', 'zh is defined as the parent language of zh, '
                . 'because zh converter can convert zh-cn to zh' ],
            [ 'zh-invalid', null, 'do not be fooled by arbitrarily composed language codes' ],
            [ 'en-gb', null, 'en does not have converter' ],
            [ 'en', null, 'en does not have converter. Although FakeConverter '
                    . 'handles en -> en conversion but it is useless' ],
        ];
    }

    public function testGetNamespaceAliases( $languageCode, $subset ) {
        $language = Language::factory( $languageCode );
        $aliases = $language->getNamespaceAliases();
        foreach ( $subset as $alias => $nsId ) {
            $this->assertEquals( $nsId, $aliases[$alias] );
        }
    }

    public static function provideGetNamespaceAliases() {
        // TODO: Add tests for NS_PROJECT_TALK and GenderNamespaces
        return [
            [
                'zh',
                [
                    '文件' => NS_FILE,
                    '檔案' => NS_FILE,
                ],
            ],
        ];
    }

    public function testEquals() {
        $en1 = new Language();
        $en1->setCode( 'en' );

        $en2 = Language::factory( 'en' );
        $en2->setCode( 'en' );

        $this->assertTrue( $en1->equals( $en2 ), 'en equals en' );

        $fr = Language::factory( 'fr' );
        $this->assertFalse( $en1->equals( $fr ), 'en not equals fr' );
    }
}