chore(test): update jest (#484)

* bring jest up to latest version
* remove babel-regenerator dependency
* make test:coverage work
* mock / test logging message for less noisy tests

Fixes N/A

.babelrc

@@ -1,11 +1,11 @@
 {
   "presets": [
     [
-      "env",
+      "@babel/preset-env",
       {
         "useBuiltIns": true,
         "targets": {
-          "node": "6.9.0"
+          "node": "10"
         },
         "exclude": [
           "transform-async-to-generator",
@@ -16,7 +16,7 @@
   ],
   "plugins": [
     [
-      "transform-object-rest-spread",
+      "@babel/plugin-proposal-object-rest-spread",
       {
         "useBuiltIns": true
       }
@@ -25,10 +25,10 @@
   "env": {
     "test": {
       "presets": [
-        "env"
+        "@babel/preset-env"
       ],
       "plugins": [
-        "transform-object-rest-spread"
+        "@babel/plugin-proposal-object-rest-spread"
       ]
     }
   }

lib/karma-webpack/controller.js

@@ -62,15 +62,15 @@ defaulting ${newOptions.output.filename} to [name].js.`.trim()
     });
   }
 
-  async bundle() {
+  bundle() {
     if (this.isActive === false && this.hasBeenBuiltAtLeastOnce === false) {
       console.log('Webpack bundling...');
       this._activePromise = this._bundle();
     }
     return this._activePromise;
   }
 
-  async _bundle() {
+  _bundle() {
     this.isActive = true;
 
     return new Promise((resolve) => {

lib/karma-webpack/preprocessor.js

@@ -83,17 +83,17 @@ ignoring attempt to set the entry option...
       return `${path.join(info.dir, info.name)}.js`;
     });
 
-  return async function processFile(content, file, done) {
-    await controller.bundle();
+  return function processFile(content, file, done) {
+    controller.bundle().then(() => {
+      file.path = normalize(file.path); // eslint-disable-line no-param-reassign
 
-    file.path = normalize(file.path); // eslint-disable-line no-param-reassign
+      const transformedFilePath = transformPath(getPathKey(file.path, true));
+      const bundleContent = controller.bundlesContent[transformedFilePath];
 
-    const transformedFilePath = transformPath(getPathKey(file.path, true));
-    const bundleContent = controller.bundlesContent[transformedFilePath];
+      file.path = transformedFilePath;
 
-    file.path = transformedFilePath;
-
-    done(null, bundleContent);
+      done(null, bundleContent);
+    });
   };
 }
 

lib/webpack/plugin.js

@@ -10,7 +10,7 @@ class KW_WebpackPlugin {
     this.compiler = compiler;
 
     // webpack bundles are finished
-    compiler.hooks.done.tap('KW_WebpackPlugin', async (stats) => {
+    compiler.hooks.done.tap('KW_WebpackPlugin', (stats) => {
       // read generated file content and store for karma preprocessor
       this.controller.bundlesContent = {};
       stats.toJson().assets.forEach((webpackFileObj) => {