fix fast forOf and add tests

test/fixtures/transformation/es6-for-of-fast/identifier/actual.js

@@ -0,0 +1,3 @@
+for (i of arr) {
+
+}

test/fixtures/transformation/es6-for-of-fast/identifier/expected.js

@@ -0,0 +1,15 @@
+"use strict";
+
+for (var _iterator = arr,
+    _isArray = Array.isArray(_iterator),
+    _i = 0,
+    _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+  if (_isArray) {
+    if (_i >= _iterator.length) break;
+    i = _iterator[_i++];
+  } else {
+    _i = _iterator.next();
+    if (_i.done) break;
+    i = _i.value;
+  }
+}

test/fixtures/transformation/es6-for-of-fast/let/actual.js

@@ -0,0 +1,3 @@
+for (let i of arr) {
+
+}

test/fixtures/transformation/es6-for-of-fast/let/expected.js

@@ -0,0 +1,16 @@
+"use strict";
+
+for (var _iterator = arr,
+    _isArray = Array.isArray(_iterator),
+    _i = 0,
+    _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+  var i = undefined;
+  if (_isArray) {
+    if (_i >= _iterator.length) break;
+    i = _iterator[_i++];
+  } else {
+    _i = _iterator.next();
+    if (_i.done) break;
+    i = _i.value;
+  }
+}

test/fixtures/transformation/es6-for-of-fast/multiple/actual.js

@@ -0,0 +1,7 @@
+for (var i of arr) {
+
+}
+
+for (var i of numbers) {
+
+}

test/fixtures/transformation/es6-for-of-fast/multiple/expected.js

@@ -0,0 +1,31 @@
+"use strict";
+
+for (var _iterator = arr,
+    _isArray = Array.isArray(_iterator),
+    _i = 0,
+    _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+  var i;
+  if (_isArray) {
+    if (_i >= _iterator.length) break;
+    i = _iterator[_i++];
+  } else {
+    _i = _iterator.next();
+    if (_i.done) break;
+    i = _i.value;
+  }
+}
+
+for (var _iterator2 = numbers,
+    _isArray2 = Array.isArray(_iterator2),
+    _i2 = 0,
+    _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
+  var i;
+  if (_isArray2) {
+    if (_i2 >= _iterator2.length) break;
+    i = _iterator2[_i2++];
+  } else {
+    _i2 = _iterator2.next();
+    if (_i2.done) break;
+    i = _i2.value;
+  }
+}

test/fixtures/transformation/es6-for-of-fast/options.json

@@ -0,0 +1,3 @@
+{
+  "fast": ["forOf"]
+}

test/fixtures/transformation/es6-for-of-fast/var/actual.js

@@ -0,0 +1,3 @@
+for (var i of arr) {
+
+}

test/fixtures/transformation/es6-for-of-fast/var/expected.js

@@ -0,0 +1,16 @@
+"use strict";
+
+for (var _iterator = arr,
+    _isArray = Array.isArray(_iterator),
+    _i = 0,
+    _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+  var i;
+  if (_isArray) {
+    if (_i >= _iterator.length) break;
+    i = _iterator[_i++];
+  } else {
+    _i = _iterator.next();
+    if (_i.done) break;
+    i = _i.value;
+  }
+}