test: fix fixtures test when run with env DUMPIO=1 (#4123)

The DUMPIO env variable is propagated to a spawned process
and results in unfortunate stdout.

.eslintrc.js

@@ -7,7 +7,7 @@ module.exports = {
     },
 
     "parserOptions": {
-        "ecmaVersion": 8
+        "ecmaVersion": 9
     },
 
     /**

package.json

@@ -51,7 +51,7 @@
     "@types/ws": "^6.0.1",
     "commonmark": "^0.28.1",
     "cross-env": "^5.0.5",
-    "eslint": "^5.9.0",
+    "eslint": "^5.15.1",
     "esprima": "^4.0.0",
     "jpeg-js": "^0.3.4",
     "minimist": "^1.2.0",

test/fixtures.spec.js

@@ -41,7 +41,11 @@ module.exports.addTests = function({testRunner, expect, defaultBrowserOptions, p
     });
     it('should close the browser when the node process closes', async({ server }) => {
       const {spawn, execSync} = require('child_process');
-      const res = spawn('node', [path.join(__dirname, 'fixtures', 'closeme.js'), puppeteerPath, JSON.stringify(defaultBrowserOptions)]);
+      const options = Object.assign({}, defaultBrowserOptions, {
+        // Disable DUMPIO to cleanly read stdout.
+        dumpio: false,
+      });
+      const res = spawn('node', [path.join(__dirname, 'fixtures', 'closeme.js'), puppeteerPath, JSON.stringify(options)]);
       let wsEndPointCallback;
       const wsEndPointPromise = new Promise(x => wsEndPointCallback = x);
       let output = '';

utils/node6-transform/index.js

@@ -22,14 +22,19 @@ const transformAsyncFunctions = require('./TransformAsyncFunctions');
 const root = path.join(__dirname, '..', '..');
 const dest = path.join(__dirname, '..', '..', 'node6');
 
+const excludes = [
+  path.resolve(root, 'test', 'assets'),
+];
+
 if (fs.existsSync(dest))
   removeRecursive(dest);
 fs.mkdirSync(dest);
 fs.mkdirSync(path.join(dest, 'utils'));
 
 copyFolder(path.join(root, 'lib'), path.join(dest, 'lib'));
 copyFolder(path.join(root, 'test'), path.join(dest, 'test'));
-copyFolder(path.join(root, 'utils'), path.join(dest, 'utils'));
+copyFolder(path.join(root, 'utils', 'testrunner'), path.join(dest, 'utils', 'testrunner'));
+copyFolder(path.join(root, 'utils', 'testserver'), path.join(dest, 'utils', 'testserver'));
 
 function copyFolder(source, target) {
   if (fs.existsSync(target))
@@ -48,7 +53,8 @@ function copyFolder(source, target) {
 
 function copyFile(from, to) {
   let text = fs.readFileSync(from);
-  if (from.endsWith('.js')) {
+  const isExcluded = excludes.some(exclude => from.startsWith(exclude));
+  if (!isExcluded && from.endsWith('.js')) {
     text = text.toString();
     const prefix = text.startsWith('#!') ? text.substring(0, text.indexOf('\n')) : '';
     text = prefix + transformAsyncFunctions(text.substring(prefix.length));