fix: only log sass warning once

Author: eddyerburgh

lib/logger.js

@@ -5,3 +5,5 @@ module.exports.info = function info (msg) {
 module.exports.warn = function info (msg) {
   console.warn('\n[vue-jest]: ' + (msg) + '\n')
 }
+
+module.exports.shouldLogStyleWarn = true

lib/process.js

@@ -101,8 +101,9 @@ module.exports = function (src, filePath) {
   }
 
   if (Array.isArray(parts.styles) && parts.styles.length > 0) {
-    if (parts.styles.some(ast => /^scss|sass|less|pcss|postcss/.test(ast.lang))) {
+    if ((parts.styles.some(ast => /^scss|sass|less|pcss|postcss/.test(ast.lang))) && logger.shouldLogStyleWarn) {
       logger.warn('Sass/SCSS, Less and PostCSS are not currently compiled by vue-jest')
+      logger.shouldLogStyleWarn = false
     }
 
     const styleStr = parts.styles.map(ast => {