Update to MediaWiki 1.24.2

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diff --git a/tests/phpunit/includes/GlobalFunctions/wfBCP47Test.php b/tests/phpunit/includes/GlobalFunctions/wfBCP47Test.php
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+<?php
+/**
+ * @group GlobalFunctions
+ * @covers ::wfBCP47
+ */
+class WfBCP47Test extends MediaWikiTestCase {
+	/**
+	 * test @see wfBCP47().
+	 * Please note the BCP 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 http://tools.ietf.org/html/bcp47
+	 * @dataProvider provideLanguageCodes()
+	 */
+	public function testBCP47( $code, $expected ) {
+		$code = strtolower( $code );
+		$this->assertEquals( $expected, wfBCP47( $code ),
+			"Applying BCP47 standard to lower case '$code'"
+		);
+
+		$code = strtoupper( $code );
+		$this->assertEquals( $expected, wfBCP47( $code ),
+			"Applying BCP47 standard to upper case '$code'"
+		);
+	}
+
+	/**
+	 * Array format is ($code, $expected)
+	 */
+	public static function provideLanguageCodes() {
+		return array(
+			// Extracted from BCP47 (list not exhaustive)
+			# 2.1.1
+			array( 'en-ca-x-ca', 'en-CA-x-ca' ),
+			array( 'sgn-be-fr', 'sgn-BE-FR' ),
+			array( 'az-latn-x-latn', 'az-Latn-x-latn' ),
+			# 2.2
+			array( 'sr-Latn-RS', 'sr-Latn-RS' ),
+			array( 'az-arab-ir', 'az-Arab-IR' ),
+
+			# 2.2.5
+			array( 'sl-nedis', 'sl-nedis' ),
+			array( 'de-ch-1996', 'de-CH-1996' ),
+
+			# 2.2.6
+			array(
+				'en-latn-gb-boont-r-extended-sequence-x-private',
+				'en-Latn-GB-boont-r-extended-sequence-x-private'
+			),
+
+			// Examples from BCP47 Appendix A
+			# Simple language subtag:
+			array( 'DE', 'de' ),
+			array( 'fR', 'fr' ),
+			array( 'ja', 'ja' ),
+
+			# Language subtag plus script subtag:
+			array( 'zh-hans', 'zh-Hans' ),
+			array( 'sr-cyrl', 'sr-Cyrl' ),
+			array( 'sr-latn', 'sr-Latn' ),
+
+			# Extended language subtags and their primary language subtag
+			# counterparts:
+			array( 'zh-cmn-hans-cn', 'zh-cmn-Hans-CN' ),
+			array( 'cmn-hans-cn', 'cmn-Hans-CN' ),
+			array( 'zh-yue-hk', 'zh-yue-HK' ),
+			array( 'yue-hk', 'yue-HK' ),
+
+			# Language-Script-Region:
+			array( 'zh-hans-cn', 'zh-Hans-CN' ),
+			array( 'sr-latn-RS', 'sr-Latn-RS' ),
+
+			# Language-Variant:
+			array( 'sl-rozaj', 'sl-rozaj' ),
+			array( 'sl-rozaj-biske', 'sl-rozaj-biske' ),
+			array( 'sl-nedis', 'sl-nedis' ),
+
+			# Language-Region-Variant:
+			array( 'de-ch-1901', 'de-CH-1901' ),
+			array( 'sl-it-nedis', 'sl-IT-nedis' ),
+
+			# Language-Script-Region-Variant:
+			array( 'hy-latn-it-arevela', 'hy-Latn-IT-arevela' ),
+
+			# Language-Region:
+			array( 'de-de', 'de-DE' ),
+			array( 'en-us', 'en-US' ),
+			array( 'es-419', 'es-419' ),
+
+			# Private use subtags:
+			array( 'de-ch-x-phonebk', 'de-CH-x-phonebk' ),
+			array( 'az-arab-x-aze-derbend', 'az-Arab-x-aze-derbend' ),
+			/**
+			 * Previous test does not reflect the BCP which states:
+			 *  az-Arab-x-AZE-derbend
+			 * AZE being private, it should be lower case, hence the test above
+			 * should probably be:
+			 *  array( 'az-arab-x-aze-derbend', 'az-Arab-x-AZE-derbend' ),
+			 */
+
+			# Private use registry values:
+			array( 'x-whatever', 'x-whatever' ),
+			array( 'qaa-qaaa-qm-x-southern', 'qaa-Qaaa-QM-x-southern' ),
+			array( 'de-qaaa', 'de-Qaaa' ),
+			array( 'sr-latn-qm', 'sr-Latn-QM' ),
+			array( 'sr-qaaa-rs', 'sr-Qaaa-RS' ),
+
+			# Tags that use extensions
+			array( 'en-us-u-islamcal', 'en-US-u-islamcal' ),
+			array( 'zh-cn-a-myext-x-private', 'zh-CN-a-myext-x-private' ),
+			array( 'en-a-myext-b-another', 'en-a-myext-b-another' ),
+
+			# Invalid:
+			// de-419-DE
+			// a-DE
+			// ar-a-aaa-b-bbb-a-ccc
+		);
+	}
+}