Adhering to async generator yield behavior change (#6452)

packages/babel-plugin-transform-async-generator-functions/test/fixtures/async-generators/yield-exec/exec.js

@@ -0,0 +1,24 @@
+"use strict";
+
+const actual = [];
+const expected = ["foo", "bar", "baz", "xyz"];
+
+const delay = ms => new Promise(resolve => setTimeout(resolve, ms));
+
+async function* test() {
+  yield await delay(0).then(() => actual.push("foo"));
+  await delay(0).then(() => actual.push("bar"));
+  yield delay(0).then(() => actual.push("baz"));
+  actual.push("xyz");
+}
+
+async function main() {
+  const g = test();
+  g.next();
+  g.next();
+  await g.next();
+}
+
+return main().then(() => {
+  assert.deepEqual(actual, expected);
+});

packages/babel-plugin-transform-async-generator-functions/test/fixtures/async-generators/yield-exec/options.json

@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    "external-helpers",
+    "transform-async-to-generator",
+    "transform-async-generator-functions"
+  ],
+  "presets": ["es2015"],
+  "parserOpts": {
+    "allowReturnOutsideFunction": true
+  }
+}

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-arrow/expected.js

@@ -1,7 +1,8 @@
 babelHelpers.asyncToGenerator(function* () {
   var _iteratorNormalCompletion = true;
   var _didIteratorError = false;
-  var _iteratorError = undefined;
+
+  var _iteratorError;
 
   try {
     for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-function/expected.js

@@ -2,7 +2,8 @@ let f = (() => {
   var _ref = babelHelpers.asyncToGenerator(function* () {
     var _iteratorNormalCompletion = true;
     var _didIteratorError = false;
-    var _iteratorError = undefined;
+
+    var _iteratorError;
 
     try {
       for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/async-generator/expected.js

@@ -2,7 +2,8 @@ let g = (() => {
   var _ref = babelHelpers.wrapAsyncGenerator(function* () {
     var _iteratorNormalCompletion = true;
     var _didIteratorError = false;
-    var _iteratorError = undefined;
+
+    var _iteratorError;
 
     try {
       for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = yield babelHelpers.awaitAsyncGenerator(_iterator.next()), _iteratorNormalCompletion = _step.done, _value = yield babelHelpers.awaitAsyncGenerator(_step.value), !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {

packages/babel-plugin-transform-async-generator-functions/test/fixtures/for-await/destructuring/expected.js

@@ -2,7 +2,8 @@ let f = (() => {
   var _ref = babelHelpers.asyncToGenerator(function* () {
     var _iteratorNormalCompletion = true;
     var _didIteratorError = false;
-    var _iteratorError = undefined;
+
+    var _iteratorError;
 
     try {
       for (var _iterator = babelHelpers.asyncIterator(a), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {