kmx.io/prism.js/tests/aliases-test.js

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• Hash : f46938e9
  Author :
  Date : 2021-04-17T22:35:25
  

  ESLint: Added no-var rule (#2837)

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• tests/aliases-test.js

• 'use strict';
  
  const { assert } = require('chai');
  const PrismLoader = require('./helper/prism-loader');
  const { languages } = require('./../components.json');
  
  
  function toArray(value) {
  	if (Array.isArray(value)) {
  		return value;
  	} else if (value === undefined) {
  		return [];
  	}
  	return [value];
  }
  
  // the keys of Prism.languages without any loaded languages (basically just a few functions)
  const ignoreKeys = Object.keys(PrismLoader.createEmptyPrism().languages);
  
  
  for (const lang in languages) {
  	if (lang === 'meta') {
  		continue;
  	}
  
  	describe(`Testing language aliases of '${lang}'`, function () {
  
  		if (languages[lang].aliasTitles) {
  			it('- should have all alias titles registered as alias', function () {
  				let aliases = new Set(toArray(languages[lang].alias));
  
  				Object.keys(languages[lang].aliasTitles).forEach(id => {
  					if (!aliases.has(id)) {
  						const titleJson = JSON.stringify(languages[lang].aliasTitles[id]);
  						assert.fail(`The alias '${id}' with the title ${titleJson} is not registered as an alias.`);
  					}
  				});
  			});
  		}
  
  		it('- should known all aliases', function () {
  
  			let loadedLanguages = new Set(Object.keys(PrismLoader.createInstance(lang).languages));
  
  			// check that all aliases are defined
  			toArray(languages[lang].alias).forEach(alias => {
  				assert.isTrue(loadedLanguages.has(alias), `The registered alias '${alias}' is not present.`);
  			});
  
  
  			// remove ignore keys
  			ignoreKeys.forEach(x => loadedLanguages.delete(x));
  
  			// remove language, aliases, and requirements
  			function remove(lang) {
  				loadedLanguages.delete(lang);
  				toArray(languages[lang].alias).forEach(alias => loadedLanguages.delete(alias));
  
  				// remove recursively
  				toArray(languages[lang].require).forEach(id => remove(id));
  			}
  			remove(lang);
  
  
  			// there should be nothing left
  			if (loadedLanguages.size > 0) {
  				const unregisteredAliases = `(${loadedLanguages.size}) ${JSON.stringify([...loadedLanguages])}`;
  				assert.fail(`There are unregistered aliases: ${unregisteredAliases}`);
  			}
  		});
  	});
  }
  

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