fix: simplify validate-addons logic & npm-exists (#67)

* hotfix: simplify validate-addons logic & npm-exists

Simplifies the usage of validate-addons and replaces the manual mock of
nom-exists with the actual.

fix: refactor function convention and add jsdcos

fix: rename validateAddons to npmPackagesExists

Renames the validateAddons packages to npmPackagesExists. Synced with
master to get latest changes from origin. Also added lint ignore to
coverage folder.

fix: remove coverage folder from commit

fix: rename test header

* fix: remove coverage from build

fix: remove coverage folder

Author: evenstensberg

.eslintignore

@@ -1 +1,2 @@
 **/__testfixtures__/*
+coverage

.gitignore

@@ -11,3 +11,6 @@ npm-debug.*
 
 # yarn log
 yarn-error.log
+
+# Jest Coverage
+coverage

__mocks__/inquirer/initialize.mock.js

@@ -1,27 +1,14 @@
 /* eslint node/no-unsupported-features: 0 */
 'use strict';
 const Rx = require('rx');
-const got = require('got');
 const questions = require('../../lib/utils/initial-questions');
+const exists = require('../../lib/utils/npm-exists');
+const initialConfig = require('../../lib/utils/initial-config');
+
 //eslint-disable-next-line
 const prompt = require('./prompt.mock');
-const initialConfig = jest.genMockFromModule('../../lib/utils/initial-config');
-
-
-function exists(pkg) {
-	const hostname = 'https://www.npmjs.org';
-	const pkgUrl = `${hostname}/package/${pkg}`;
-	return got(pkgUrl, {method: 'HEAD'})
-			.then( () => {
-				return true;
-			})
-			.catch(() => {
-				return false;
-			});
-}
 
-//
-async function validateAddons(addon) {
+async function npmPackagesExists(addon) {
 	let arr = [];
 	for(let k of addon) {
 		arr.push(await exists(k));
@@ -40,7 +27,6 @@ function init(pkg, answer) {
 
 
 module.exports = {
-	exists,
-	validateAddons,
+	npmPackagesExists,
 	init
 };

lib/initialize.js

@@ -1,5 +1,5 @@
 const questions = require('./utils/initial-questions');
-const validateAddons = require('./utils/validate-addons');
+const npmPackagesExists = require('./utils/npm-packages-exists');
 const prompt = require('./inquirer-prompt');
 const initialConfig = require('./utils/initial-config');
 const Rx = require('rx');
@@ -11,7 +11,7 @@ const Rx = require('rx');
 * if we are running the init command with no arguments or if we got dependencies
 *
 * @param { Object } pkg - packages included when running the init command
-* @returns { <Function> } prompt|validateAddons - returns either an inquirer prompt with
+* @returns { <Function> } prompt|npmPackagesExists - returns either an inquirer prompt with
 * the initial questions we provide, or validates the packages given
 */
 
@@ -20,6 +20,6 @@ module.exports = function initializeInquirer(pkg) {
 		return prompt(Rx.Observable.from(questions), initialConfig);
 	}
 	else {
-		return validateAddons(pkg);
+		return npmPackagesExists(pkg);
 	}
 };

lib/utils/npm-exists.spec.js

@@ -1,6 +1,6 @@
 /* eslint node/no-unsupported-features: 0 */
 'use strict';
-const {exists} = require('../../__mocks__/inquirer/initialize.mock');
+const exists = require('./npm-exists');
 
 describe('exists', () => {
 

lib/utils/npm-packages-exists.js

@@ -0,0 +1,41 @@
+const npmExists = require('./npm-exists');
+const resolvePackages = require('./resolve-packages');
+
+
+/*
+* @function npmPackagesExists
+*
+* Loops through an array and checks if a package is registered
+* on npm and throws an error if it is not from @checkEachPackage
+*
+* @param { Array <String> } pkg - Array of packages to check existence of
+* @returns { Array } resolvePackages - Returns an process to install the pkg
+*/
+
+module.exports = function npmPackagesExists(addons) {
+	return addons.map( pkg => checkEachPackage(pkg));
+};
+
+/*
+* @function checkEachPackage
+*
+* Checks if a package is registered on npm and throws if it is not
+*
+* @param { Object } pkg - pkg to check existence of
+* @returns { <Function|Error> } resolvePackages - Returns an process to install the pkg
+*/
+
+function checkEachPackage(pkg) {
+	return npmExists(pkg).then( (moduleExists) => {
+		if(!moduleExists) {
+			Error.stackTraceLimit = 0;
+			throw new TypeError('Package isn\'t registered on npm.');
+		}
+		if (moduleExists) {
+			return resolvePackages(pkg);
+		}
+	}).catch(err => {
+		console.error(err.stack || err);
+		process.exit(0);
+	});
+}

lib/utils/validate-addons.spec.js renamed to lib/utils/npm-packages-exists.spec.js

@@ -1,12 +1,12 @@
 /* eslint node/no-unsupported-features: 0 */
 'use strict';
 
-describe('validate-addons', () => {
+describe('npm-packages-exists', () => {
 	//eslint-disable-next-line
-	const {validateAddons} = require('../../__mocks__/inquirer/initialize.mock');
+	const {npmPackagesExists} = require('../../__mocks__/inquirer/initialize.mock');
 
 	it('should validate multiple packages if supplied', async () => {
-		let itValidatesAddon = await validateAddons(['webpack-addons-ylvis', 'webpack-addons-noop']);
+		let itValidatesAddon = await npmPackagesExists(['webpack-addons-ylvis', 'webpack-addons-noop']);
 		// BUG: We are making the values strings, so the tests pass
 		expect(itValidatesAddon.toString()).toBe([true, false].toString());
 	});