feat: add expirmentalCSSCompile flag

Author: eddyerburgh

lib/process-style.js

@@ -1,8 +1,9 @@
 const cssExtract = require('extract-from-css')
 
-module.exports = function processStyle (stylePart, filePath, config) {
-  if (!stylePart) return {}
-
+module.exports = function processStyle (stylePart, filePath, config = {}) {
+  if (!stylePart || config.experimentalCSSCompile === false) {
+    return {}
+  }
   const processStyleByLang = lang => require('./compilers/' + lang + '-compiler')(stylePart.content, filePath, config)
 
   let cssCode = stylePart.content
@@ -17,8 +18,8 @@ module.exports = function processStyle (stylePart, filePath, config) {
   }
 
   const cssNames = cssExtract.extractClasses(cssCode)
-  const obj = {}
 
+  const obj = {}
   for (let i = 0, l = cssNames.length; i < l; i++) {
     obj[cssNames[i]] = cssNames[i]
   }

package.json

@@ -79,7 +79,12 @@
       "^.+\\.js$": "<rootDir>/node_modules/babel-jest",
       ".*\\.(vue)$": "<rootDir>/vue-jest.js"
     },
-    "mapCoverage": true
+    "mapCoverage": true,
+    "globals": {
+      "vue-jest": {
+        "experimentalStyles": true
+      }
+    }
   },
   "repository": {
     "type": "git",

test/stylus.spec.js

@@ -1,6 +1,9 @@
 import { shallow } from 'vue-test-utils'
 import Stylus from './resources/Stylus.vue'
 import StylusRelative from './resources/StylusRelative.vue'
+import { resolve } from 'path'
+import { readFileSync } from 'fs'
+import jestVue from '../vue-jest'
 
 describe('processes .vue file with Stylus style', () => {
   let wrapper
@@ -23,4 +26,14 @@ describe('processes .vue file with Stylus style', () => {
   it('should handle relative imports', () => {
     expect(() => shallow(StylusRelative)).not.toThrow()
   })
+
+  it('does not attempty to compile if experimentalStyles flag is passed', () => {
+    const filePath = resolve(__dirname, './resources/Basic.vue')
+    const fileString = readFileSync(filePath, { encoding: 'utf8' })
+    const fileStringWithInvalidSass = `
+      ${fileString}
+      <style lang="stylus">@something</style>
+    `
+    jestVue.process(fileStringWithInvalidSass, filePath, { globals: { 'vue-jest': { experimentalCSSCompile: false }}})
+  })
 })