test - integration - better error handling

test/integration/index.js

@@ -6,15 +6,14 @@ const bundlePath = path.join(__dirname, 'bundle.js')
 
 const b = browserify()
 
-try {
-  const writeStream = fs.createWriteStream(bundlePath)
+const writeStream = fs.createWriteStream(bundlePath)
 
-  tests.forEach(function (fileName) {
+tests.forEach(function (fileName) {
   b.add(path.join(__dirname, 'lib', fileName))
-  })
-
-  b.bundle().pipe(writeStream)
-} catch (err) {
-  throw new Error('Integration tests build failure - ' + err.stack)
-}
+})
 
+b.bundle()
+.pipe(writeStream)
+.on('error', (err) => {
+  throw err
+})