From 0056b0fcd6c9f7c47fe60544f3cb23b26df32a90 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 13 Oct 2014 20:13:20 +1100
Subject: [PATCH] nicer exec test option

---
 lib/6to5/transform.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/6to5/transform.js b/lib/6to5/transform.js
index bac4f7f8ca..5a7798f35d 100644
--- a/lib/6to5/transform.js
+++ b/lib/6to5/transform.js
@@ -19,6 +19,7 @@ transform.test = function (task, assert) {
   var actual = task.actual;
   var expect = task.expect;
   var opts   = task.options;
+  var exec   = opts.exec;
 
   opts.filename = actual.filename;
 
@@ -28,14 +29,14 @@ transform.test = function (task, assert) {
   var actualAst    = actualResult.ast;
   actualCode       = recast.prettyPrint(actualAst).code;
 
-  if (task.options.exec) {
+  if (exec) {
     var fn = new Function("assert", actualCode);
     fn(assert);
   }
 
   var expectCode = expect.code.trim();
 
-  if (!task.options.exec || (task.options.exec && expectCode)) {
+  if (!exec || (exec && expectCode)) {
     var expectAst    = util.parse(expect, expectCode);
     var expectResult = recast.prettyPrint(expectAst);
     expectCode       = expectResult.code;
@@ -60,7 +61,7 @@ transform.test = function (task, assert) {
 
 transform._ensureTransformerNames = function (type, keys) {
   _.each(keys, function (key) {
-    if (key[0] === "_" || !transform.transformers[key]) {
+    if (key[0] === "_" || !_.has(transform.transformers, key)) {
       throw new ReferenceError("unknown transformer " + key + " specified in " + type);
     }
   });