Fix JSDoc comments for jest helpers

lib/jest-helpers.js

@@ -20,11 +20,11 @@ const nunjucksEnv = nunjucks.configure([configPaths.src, configPaths.components]
 /**
  * Render the raw HTML for a component
  *
- * @param {String} componentName
- * @param {Object} options options to pass to the component macro
- * @param {String} [callBlock] if provided, the macro is called using the
+ * @param {string} componentName
+ * @param {object} options - options to pass to the component macro
+ * @param {string} [callBlock] - if provided, the macro is called using the
  *   Nunjucks call tag, with the callBlock passed as the contents of the block
- * @returns {String} HTML rendered by the macro
+ * @returns {string} HTML rendered by the macro
  */
 function renderHtml (componentName, options, callBlock = false) {
   if (typeof options === 'undefined') {
@@ -52,12 +52,11 @@ function renderHtml (componentName, options, callBlock = false) {
  *
  * Allows us to interrogate the output of the macro using a jQuery-like syntax
  *
- * @param {String} componentName
- * @param {Object} options options to pass to the component macro
- * @param {String} [callBlock] if provided, the macro is called using the
+ * @param {string} componentName
+ * @param {object} options - options to pass to the component macro
+ * @param {string} [callBlock] - if provided, the macro is called using the
  *   Nunjucks call tag, with the callBlock passed as the contents of the block
- *
- * @returns {CheerioAPI} a jQuery-like representation of the macro output
+ * @returns {import('cheerio')} a jQuery-like representation of the macro output
  */
 function render (componentName, options, callBlock = false) {
   return cheerio.load(
@@ -82,6 +81,7 @@ function renderTemplate (params = {}, blocks = {}) {
 
 /**
  * Get examples from a component's metadata file
+ *
  * @param {string} componentName
  * @returns {object} returns object that includes all examples at once
  */
@@ -100,8 +100,8 @@ async function getExamples (componentName) {
 /**
  * Render Sass
  *
- * @param {object} options Options to pass to sass.render
- * @return {promise} Result of calling sass.render
+ * @param {import('node-sass').Options} options - Options to pass to sass.render
+ * @returns {Promise<import('node-sass').Result>} Result of calling sass.render
  */
 function renderSass (options) {
   return sassRender({
@@ -115,9 +115,10 @@ function renderSass (options) {
  * child elements that do not match the component.
  * Relies on B.E.M naming ensuring that child components relating to a component
  * are namespaced.
- * @param {function} $ requires an instance of cheerio (jQuery) that includes the
+ *
+ * @param {import('cheerio')} $ - requires an instance of cheerio (jQuery) that includes the
  * rendered component.
- * @param {string} className the top level class 'Block' in B.E.M terminology
+ * @param {string} className - the top level class 'Block' in B.E.M terminology
  * @returns {string} returns HTML
  */
 function htmlWithClassName ($, className) {