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test/index.js

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+var languageData = require( '../index' ),
+	assert = require( 'assert' );
+
+describe( 'languagedata', function () {
+	var orphanScripts, badRedirects, doubleRedirects, languagesWithoutAutonym;
+	/*
+	 * Runs over all script codes mentioned in langdb and checks whether
+	 * they belong to the 'Other' group.
+	 */
+	orphanScripts = function () {
+		var language, script,
+			result = [];
+		for ( language in languageData.languages ) {
+			script = languageData.getScript( language );
+			if ( languageData.getGroupOfScript( script ) === 'Other' ) {
+				result.push( script );
+			}
+		}
+		return result;
+	};
+	/*
+	 * Runs over all languages and checks that all redirects have a valid target.
+	 */
+	badRedirects = function () {
+		var language, target,
+			result = [];
+		for ( language in languageData.languages ) {
+			target = languageData.isRedirect( language );
+			if ( target && !languageData.languages[ target ] ) {
+				result.push( language );
+			}
+		}
+		return result;
+	};
+	/*
+	 * Runs over all languages and checks that all redirects point to a language.
+	 * There's no reason to have double redirects.
+	 */
+	doubleRedirects = function () {
+		var language, target,
+			result = [];
+		for ( language in languageData.languages ) {
+			target = languageData.isRedirect( language );
+			if ( target && languageData.isRedirect( target ) ) {
+				result.push( language );
+			}
+		}
+		return result;
+	};
+	/*
+	 * Runs over all script codes mentioned in langdb and checks whether
+	 * they have something that looks like an autonym.
+	 */
+	languagesWithoutAutonym = function () {
+		var language,
+			result = [];
+		for ( language in languageData.languages ) {
+			if ( typeof languageData.getAutonym( language ) !== 'string' ) {
+				result.push( language );
+			}
+		}
+		return result;
+	};
+	it( 'autonyms', function () {
+		var autonyms;
+		// Add a language in run time.
+		// This is done early to make sure that it doesn't break other functions.
+		languageData.addLanguage( 'qqq', {
+			script: 'Latn',
+			regions: [ 'SP' ],
+			autonym: 'Language documentation'
+		} );
+		assert.ok( languageData.getAutonym( 'qqq' ), 'Language documentation', 'Language qqq was added with the correct autonym' );
+		autonyms = languageData.getAutonyms();
+		assert.strictEqual( autonyms[ 'zu' ], 'isiZulu', 'Correct autonym is returned for Zulu using getAutonyms().' );
+		assert.strictEqual( autonyms[ 'pa' ], undefined, 'Language "pa" is not listed in autonyms, because it is a redirect' );
+		assert.strictEqual( autonyms[ 'pa-guru' ], 'ਪੰਜਾਬੀ', 'Language "pa-guru" has the correct autonym' );
+		assert.deepEqual( languagesWithoutAutonym(), [], 'All languages have autonyms.' );
+		assert.strictEqual( languageData.getAutonym( 'pa' ), 'ਪੰਜਾਬੀ', 'Correct autonym of the Punjabi language was selected using code pa.' );
+		assert.strictEqual( languageData.getAutonym( 'pa-guru' ), 'ਪੰਜਾਬੀ', 'Correct autonym of the Punjabi language was selected using code pa-guru.' );
+		// autonyms: gn: avañe'ẽ, de: deutsch, hu: magyar, fi: suomi
+		assert.deepEqual( [ 'de', 'fi', 'gn', 'hu' ].sort( languageData.sortByAutonym ), [
+			'gn', 'de', 'hu', 'fi'
+		], 'Languages are correctly sorted by autonym' );
+	} );
+	it( 'regions and groups', function () {
+		var languagesToGroup, groupedLanguages;
+		// This test assumes that we don't want any scripts to be in the 'Other'
+		// group. Actually, this may become wrong some day.
+		assert.deepEqual( orphanScripts(), [], 'All scripts belong to script groups.' );
+		languagesToGroup = {
+			en: 'English',
+			'fiu-vro': 'Võro', // Alias before target
+			ru: 'русский',
+			sr: 'српски', // Alias before target
+			'sr-cyrl': 'српски', // Target before alias
+			'sr-latn': 'srpski', // Target before alias
+			'sr-el': 'srpski', // Alias after target
+			vro: 'Võro' // Target after alias
+		};
+		groupedLanguages = {
+			Latin: [ 'en', 'fiu-vro', 'sr-latn', 'sr-el', 'vro' ],
+			Cyrillic: [ 'ru', 'sr', 'sr-cyrl' ]
+		};
+		assert.deepEqual( languageData.getLanguagesByScriptGroup( languagesToGroup ), groupedLanguages, 'A custom list of languages is grouped correctly using getLanguagesByScriptGroup.' );
+		assert.deepEqual( languageData.getRegions( 'lzz' ), [
+			'EU', 'ME'
+		], 'Correct regions of the Laz language were selected' );
+		assert.strictEqual( languageData.getRegions( 'no-such-language' ), 'UNKNOWN', 'The region of an invalid language is "UNKNOWN"' );
+		assert.ok( languageData.getLanguagesInTerritory( 'RU' ).includes( 'sah' ), 'Sakha language is spoken in Russia' );
+	} );
+	it( 'scripts', function () {
+		// This test assumes that we don't want any scripts to be in the 'Other'
+		// group. Actually, this may become wrong some day.
+		assert.deepEqual( orphanScripts(), [], 'All scripts belong to script groups.' );
+		assert.deepEqual( languageData.getLanguagesInScript( 'Guru' ), [ 'pa-guru' ], '"pa-guru" is written in script Guru, and "pa" is skipped as a redirect' );
+		assert.deepEqual( languageData.getLanguagesInScripts( [ 'Geor', 'Armn' ] ), [ 'hy', 'ka', 'xmf' ], 'languages in scripts Geor and Armn are selected correctly' );
+		assert.deepEqual( languageData.getLanguagesInScript( 'Knda' ), [
+			'kn', 'tcy'
+		], 'languages in script Knda are selected correctly' );
+		assert.strictEqual( languageData.getGroupOfScript( 'Beng' ), 'SouthAsian', 'Bengali script belongs to the SouthAsian group.' );
+		assert.strictEqual( languageData.getScriptGroupOfLanguage( 'iu' ), 'NativeAmerican', 'The script of the Inupiaq language belongs to the NativeAmerican group.' );
+	} );
+	it( 'redirects', function () {
+		assert.strictEqual( languageData.isRedirect( 'sr-ec' ), 'sr-cyrl', '"sr-ec" is a redirect to "sr-cyrl"' );
+		assert.deepEqual( badRedirects(), [], 'All redirects have valid targets.' );
+		assert.deepEqual( doubleRedirects(), [], 'There are no double redirects.' );
+		assert.strictEqual( languageData.getScript( 'no-such-language' ), 'Zyyy', 'A script for an unknown language is Zyyy - undetermined' );
+		assert.strictEqual( languageData.getScript( 'ii' ), 'Yiii', 'Correct script of the Yi language was selected' );
+	} );
+	it( 'directionality', function () {
+		assert.strictEqual( languageData.isRtl( 'te' ), false, 'Telugu language is not RTL' );
+		assert.strictEqual( languageData.isRtl( 'dv' ), true, 'Divehi language is RTL' );
+		assert.strictEqual( languageData.getDir( 'mzn' ), 'rtl', 'Mazandarani language is RTL' );
+		assert.strictEqual( languageData.getDir( 'uk' ), 'ltr', 'Ukrainian language is LTR' );
+	} );
+} );