test: add integration test with corejs3 polyfill

packages/babel-plugin-proposal-async-generator-functions/package.json

@@ -25,6 +25,7 @@
   },
   "devDependencies": {
     "@babel/core": "workspace:^7.10.5",
-    "@babel/helper-plugin-test-runner": "workspace:^7.10.4"
+    "@babel/helper-plugin-test-runner": "workspace:^7.10.4",
+    "core-js-pure": "3.6.5"
   }
 }

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/inject-corejs-async-iterator-polyfill.js

@@ -0,0 +1,13 @@
+// prettier-ignore
+module.exports = ({ types: t, template }) => ({
+  visitor: {
+    Program: {
+      exit(path) {
+        path.unshiftContainer(
+          "body",
+          template.ast`Symbol.asyncIterator = require("core-js-pure/es/symbol/async-iterator.js");`
+        );
+      }
+    }
+  }
+});

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/issue-9905/exec.js

@@ -0,0 +1,20 @@
+const log = [];
+
+async function* func1() {
+  log.push(1);
+  yield "a";
+  log.push(2);
+}
+
+async function* func2() {
+  yield* func1();
+  log.push(3);
+}
+
+return (async () => {
+  const iterator = func2();
+  await iterator.next();
+  await iterator.return();
+
+  expect(log).toEqual([1]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/issue-9905/options.json

@@ -0,0 +1,3 @@
+{
+  "minNodeVersion": "8.0.0"
+}

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/options.json

@@ -0,0 +1,10 @@
+{
+  "parserOpts": {
+    "allowReturnOutsideFunction": true
+  },
+  "plugins": [
+    "transform-async-to-generator",
+    "proposal-async-generator-functions",
+    "./inject-corejs-async-iterator-polyfill.js"
+  ]
+}

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method-with-finally-multiple-parallel/exec.js

@@ -0,0 +1,34 @@
+const log = [];
+
+async function* inner() {
+  try {
+    log.push(1);
+    yield "a";
+    log.push(2);
+    yield "b";
+    log.push(3);
+  } finally {
+    log.push(4);
+    yield "c";
+    log.push(5);
+  }
+}
+
+async function* outer() {
+  log.push(6);
+  yield* inner();
+  log.push(7);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([6, 1]);
+
+  const [res1, res2] = await Promise.all([ iterator.return("x"), iterator.return("y") ]);
+  expect(res1).toEqual({ value: "c", done: false });
+  expect(res2).toEqual({ value: "y", done: true });
+  expect(log).toEqual([6, 1, 4]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method-with-finally-multiple-parallel/options.json

@@ -0,0 +1,3 @@
+{
+  "minNodeVersion": "8.0.0"
+}

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method-with-finally-multiple-serial/exec.js

@@ -0,0 +1,37 @@
+const log = [];
+
+async function* inner() {
+  try {
+    log.push(1);
+    yield "a";
+    log.push(2);
+    yield "b";
+    log.push(3);
+  } finally {
+    log.push(4);
+    yield "c";
+    log.push(5);
+  }
+}
+
+async function* outer() {
+  log.push(6);
+  yield* inner();
+  log.push(7);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([6, 1]);
+
+  res = await iterator.return("x");
+  expect(res).toEqual({ value: "c", done: false });
+  expect(log).toEqual([6, 1, 4]);
+
+  res = await iterator.return("y");
+  expect(res).toEqual({ value: "y", done: true });
+  expect(log).toEqual([6, 1, 4]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method-with-finally-multiple-serial/options.json

@@ -0,0 +1,3 @@
+{
+  "minNodeVersion": "8.0.0"
+}

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method-with-finally/exec.js

@@ -0,0 +1,37 @@
+const log = [];
+
+async function* inner() {
+  try {
+    log.push(1);
+    yield "a";
+    log.push(2);
+    yield "b";
+    log.push(3);
+  } finally {
+    log.push(4);
+    yield "c";
+    log.push(5);
+  }
+}
+
+async function* outer() {
+  log.push(6);
+  yield* inner();
+  log.push(7);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([6, 1]);
+
+  res = await iterator.return();
+  expect(res).toEqual({ value: "c", done: false });
+  expect(log).toEqual([6, 1, 4]);
+
+  res = await iterator.next();
+  expect(res).toEqual({ value: undefined, done: true });
+  expect(log).toEqual([6, 1, 4, 5, 7]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method/exec.js

@@ -0,0 +1,31 @@
+const log = [];
+
+async function* inner() {
+  log.push(1);
+  yield "a";
+  log.push(2);
+  yield "b";
+  log.push(3);
+}
+
+async function* outer() {
+  log.push(4);
+  yield* inner();
+  log.push(5);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([4, 1]);
+
+  res = await iterator.return();
+  expect(res).toEqual({ value: undefined, done: true });
+  expect(log).toEqual([4, 1]);
+
+  res = await iterator.next();
+  expect(res).toEqual({ value: undefined, done: true });
+  expect(log).toEqual([4, 1]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/return-method/options.json

@@ -0,0 +1,3 @@
+{
+  "minNodeVersion": "8.0.0"
+}

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/throw-method-with-catch/exec.js

@@ -0,0 +1,37 @@
+const log = [];
+
+async function* inner() {
+  try {
+    log.push(1);
+    yield "a";
+    log.push(2);
+    yield "b";
+    log.push(3);
+  } catch (e) {
+    log.push(4);
+    yield "c";
+    log.push(5);
+  }
+}
+
+async function* outer() {
+  log.push(6);
+  yield* inner();
+  log.push(7);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([6, 1]);
+
+  res = await iterator.throw(new Error("TEST"));
+  expect(res).toEqual({ value: "c", done: false });
+  expect(log).toEqual([6, 1, 4]);
+
+  res = await iterator.next();
+  expect(res).toEqual({ value: undefined, done: true });
+  expect(log).toEqual([6, 1, 4, 5, 7]);
+})();

packages/babel-plugin-proposal-async-generator-functions/test/fixtures/yield-star-polyfill-corejs3/throw-method-with-finally/exec.js

@@ -0,0 +1,37 @@
+const log = [];
+
+async function* inner() {
+  try {
+    log.push(1);
+    yield "a";
+    log.push(2);
+    yield "b";
+    log.push(3);
+  } finally {
+    log.push(4);
+    yield "c";
+    log.push(5);
+  }
+}
+
+async function* outer() {
+  log.push(6);
+  yield* inner();
+  log.push(7);
+}
+
+return (async () => {
+  const iterator = outer();
+
+  let res = await iterator.next();
+  expect(res).toEqual({ value: "a", done: false });
+  expect(log).toEqual([6, 1]);
+
+  res = await iterator.throw(new Error("TEST"));
+  expect(res).toEqual({ value: "c", done: false });
+  expect(log).toEqual([6, 1, 4]);
+
+  // "yield" in finally suspended the exception for one turn
+  await expect(iterator.next()).rejects.toThrow(/TEST/);
+  expect(log).toEqual([6, 1, 4, 5]);
+})();

yarn.lock

@@ -971,6 +971,7 @@ __metadata:
     "@babel/helper-plugin-utils": "workspace:^7.10.4"
     "@babel/helper-remap-async-to-generator": "workspace:^7.10.4"
     "@babel/plugin-syntax-async-generators": ^7.8.0
+    core-js-pure: 3.6.5
   peerDependencies:
     "@babel/core": ^7.0.0-0
   languageName: unknown
@@ -7000,7 +7001,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"core-js-pure@npm:^3.0.0, core-js-pure@npm:^3.2.1":
+"core-js-pure@npm:3.6.5, core-js-pure@npm:^3.0.0, core-js-pure@npm:^3.2.1":
   version: 3.6.5
   resolution: "core-js-pure@npm:3.6.5"
   checksum: 91fc8e0b699d5bcb11f265ad4544d08c98096b86ad6c9b4c00109616db0aa992ceb58ea82d0dbae2a16658a7aaf2922aa6f9fc1107dc3b0055270799d0414a3f