+<?php
+
+/**
+ * @covers LanguageCode
+ * @group Language
+ *
+ * @author Thiemo Kreuz
+ */
+class LanguageCodeTest extends MediaWikiUnitTestCase {
+
+ public function testConstructor() {
+ $instance = new LanguageCode();
+
+ $this->assertInstanceOf( LanguageCode::class, $instance );
+ }
+
+ public function testGetDeprecatedCodeMapping() {
+ $map = LanguageCode::getDeprecatedCodeMapping();
+
+ $this->assertInternalType( 'array', $map );
+ $this->assertContainsOnly( 'string', array_keys( $map ) );
+ $this->assertArrayNotHasKey( '', $map );
+ $this->assertContainsOnly( 'string', $map );
+ $this->assertNotContains( '', $map );
+
+ // Codes special to MediaWiki should never appear in a map of "deprecated" codes
+ $this->assertArrayNotHasKey( 'qqq', $map, 'documentation' );
+ $this->assertNotContains( 'qqq', $map, 'documentation' );
+ $this->assertArrayNotHasKey( 'qqx', $map, 'debug code' );
+ $this->assertNotContains( 'qqx', $map, 'debug code' );
+
+ // Valid language codes that are currently not "deprecated"
+ $this->assertArrayNotHasKey( 'bh', $map, 'family of Bihari languages' );
+ $this->assertArrayNotHasKey( 'no', $map, 'family of Norwegian languages' );
+ $this->assertArrayNotHasKey( 'simple', $map );
+ }
+
+ public function testReplaceDeprecatedCodes() {
+ $this->assertEquals( 'gsw', LanguageCode::replaceDeprecatedCodes( 'als' ) );
+ $this->assertEquals( 'gsw', LanguageCode::replaceDeprecatedCodes( 'gsw' ) );
+ $this->assertEquals( null, LanguageCode::replaceDeprecatedCodes( null ) );
+ }
+
+ /**
+ * test @see LanguageCode::bcp47().
+ * Please note the BCP 47 explicitly state that language codes are case
+ * insensitive, there are some exceptions to the rule :)
+ * This test is used to verify our formatting against all lower and
+ * all upper cases language code.
+ *
+ * @see https://tools.ietf.org/html/bcp47
+ * @dataProvider provideLanguageCodes()
+ */
+ public function testBcp47( $code, $expected ) {
+ $this->assertEquals( $expected, LanguageCode::bcp47( $code ),
+ "Applying BCP 47 standard to '$code'"
+ );
+
+ $code = strtolower( $code );
+ $this->assertEquals( $expected, LanguageCode::bcp47( $code ),
+ "Applying BCP 47 standard to lower case '$code'"
+ );
+
+ $code = strtoupper( $code );
+ $this->assertEquals( $expected, LanguageCode::bcp47( $code ),
+ "Applying BCP 47 standard to upper case '$code'"
+ );
+ }
+
+ /**
+ * Array format is ($code, $expected)
+ */
+ public static function provideLanguageCodes() {
+ return [
+ // Extracted from BCP 47 (list not exhaustive)
+ # 2.1.1
+ [ 'en-ca-x-ca', 'en-CA-x-ca' ],
+ [ 'sgn-be-fr', 'sgn-BE-FR' ],
+ [ 'az-latn-x-latn', 'az-Latn-x-latn' ],
+ # 2.2
+ [ 'sr-Latn-RS', 'sr-Latn-RS' ],
+ [ 'az-arab-ir', 'az-Arab-IR' ],
+
+ # 2.2.5
+ [ 'sl-nedis', 'sl-nedis' ],
+ [ 'de-ch-1996', 'de-CH-1996' ],
+
+ # 2.2.6
+ [
+ 'en-latn-gb-boont-r-extended-sequence-x-private',
+ 'en-Latn-GB-boont-r-extended-sequence-x-private'
+ ],
+
+ // Examples from BCP 47 Appendix A
+ # Simple language subtag:
+ [ 'DE', 'de' ],
+ [ 'fR', 'fr' ],
+ [ 'ja', 'ja' ],
+
+ # Language subtag plus script subtag:
+ [ 'zh-hans', 'zh-Hans' ],
+ [ 'sr-cyrl', 'sr-Cyrl' ],
+ [ 'sr-latn', 'sr-Latn' ],
+
+ # Extended language subtags and their primary language subtag
+ # counterparts:
+ [ 'zh-cmn-hans-cn', 'zh-cmn-Hans-CN' ],
+ [ 'cmn-hans-cn', 'cmn-Hans-CN' ],
+ [ 'zh-yue-hk', 'zh-yue-HK' ],
+ [ 'yue-hk', 'yue-HK' ],
+
+ # Language-Script-Region:
+ [ 'zh-hans-cn', 'zh-Hans-CN' ],
+ [ 'sr-latn-RS', 'sr-Latn-RS' ],
+
+ # Language-Variant:
+ [ 'sl-rozaj', 'sl-rozaj' ],
+ [ 'sl-rozaj-biske', 'sl-rozaj-biske' ],
+ [ 'sl-nedis', 'sl-nedis' ],
+
+ # Language-Region-Variant:
+ [ 'de-ch-1901', 'de-CH-1901' ],
+ [ 'sl-it-nedis', 'sl-IT-nedis' ],
+
+ # Language-Script-Region-Variant:
+ [ 'hy-latn-it-arevela', 'hy-Latn-IT-arevela' ],
+
+ # Language-Region:
+ [ 'de-de', 'de-DE' ],
+ [ 'en-us', 'en-US' ],
+ [ 'es-419', 'es-419' ],
+
+ # Private use subtags:
+ [ 'de-ch-x-phonebk', 'de-CH-x-phonebk' ],
+ [ 'az-arab-x-aze-derbend', 'az-Arab-x-aze-derbend' ],
+ /**
+ * Previous test does not reflect the BCP 47 which states:
+ * az-Arab-x-AZE-derbend
+ * AZE being private, it should be lower case, hence the test above
+ * should probably be:
+ * [ 'az-arab-x-aze-derbend', 'az-Arab-x-AZE-derbend' ],
+ */
+
+ # Private use registry values:
+ [ 'x-whatever', 'x-whatever' ],
+ [ 'qaa-qaaa-qm-x-southern', 'qaa-Qaaa-QM-x-southern' ],
+ [ 'de-qaaa', 'de-Qaaa' ],
+ [ 'sr-latn-qm', 'sr-Latn-QM' ],
+ [ 'sr-qaaa-rs', 'sr-Qaaa-RS' ],
+
+ # Tags that use extensions
+ [ 'en-us-u-islamcal', 'en-US-u-islamcal' ],
+ [ 'zh-cn-a-myext-x-private', 'zh-CN-a-myext-x-private' ],
+ [ 'en-a-myext-b-another', 'en-a-myext-b-another' ],
+
+ # Invalid:
+ // de-419-DE
+ // a-DE
+ // ar-a-aaa-b-bbb-a-ccc
+
+ # Non-standard and deprecated language codes used by MediaWiki
+ [ 'als', 'gsw' ],
+ [ 'bat-smg', 'sgs' ],
+ [ 'be-x-old', 'be-tarask' ],
+ [ 'fiu-vro', 'vro' ],
+ [ 'roa-rup', 'rup' ],
+ [ 'zh-classical', 'lzh' ],
+ [ 'zh-min-nan', 'nan' ],
+ [ 'zh-yue', 'yue' ],
+ [ 'cbk-zam', 'cbk' ],
+ [ 'de-formal', 'de-x-formal' ],
+ [ 'eml', 'egl' ],
+ [ 'en-rtl', 'en-x-rtl' ],
+ [ 'es-formal', 'es-x-formal' ],
+ [ 'hu-formal', 'hu-x-formal' ],
+ [ 'kk-Arab', 'kk-Arab' ],
+ [ 'kk-Cyrl', 'kk-Cyrl' ],
+ [ 'kk-Latn', 'kk-Latn' ],
+ [ 'map-bms', 'jv-x-bms' ],
+ [ 'mo', 'ro-Cyrl-MD' ],
+ [ 'nrm', 'nrf' ],
+ [ 'nl-informal', 'nl-x-informal' ],
+ [ 'roa-tara', 'nap-x-tara' ],
+ [ 'simple', 'en-simple' ],
+ [ 'sr-ec', 'sr-Cyrl' ],
+ [ 'sr-el', 'sr-Latn' ],
+ [ 'zh-cn', 'zh-Hans-CN' ],
+ [ 'zh-sg', 'zh-Hans-SG' ],
+ [ 'zh-my', 'zh-Hans-MY' ],
+ [ 'zh-tw', 'zh-Hant-TW' ],
+ [ 'zh-hk', 'zh-Hant-HK' ],
+ [ 'zh-mo', 'zh-Hant-MO' ],
+ [ 'zh-hans', 'zh-Hans' ],
+ [ 'zh-hant', 'zh-Hant' ],
+ ];
+ }
+
+}