Remove --harmony-async-await runtime flag

test/mjsunit/harmony/async-await-basic.js

Index: test/mjsunit/harmony/async-await-basic.js
diff --git a/test/mjsunit/harmony/async-await-basic.js b/test/mjsunit/harmony/async-await-basic.js
deleted file mode 100644
index ef632f681af7fae8544c6bcccd61ba4dc12406af..0000000000000000000000000000000000000000
--- a/test/mjsunit/harmony/async-await-basic.js
+++ /dev/null
@@ -1,392 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --harmony-async-await --allow-natives-syntax
-
-// Do not install `AsyncFunction` constructor on global object
-
-function assertThrowsAsync(run, errorType, message) {
-  var actual;
-  var hadValue = false;
-  var hadError = false;
-  var promise = run();
-
-  if (typeof promise !== "object" || typeof promise.then !== "function") {
-    throw new MjsUnitAssertionError(
-        "Expected " + run.toString() +
-        " to return a Promise, but it returned " + PrettyPrint(promise));
-  }
-
-  promise.then(function(value) { hadValue = true; actual = value; },
-               function(error) { hadError = true; actual = error; });
-
-  assertFalse(hadValue || hadError);
-
-  %RunMicrotasks();
-
-  if (!hadError) {
-    throw new MjsUnitAssertionError(
-        "Expected " + run + "() to throw " + errorType.name +
-        ", but did not throw.");
-  }
-  if (!(actual instanceof errorType))
-    throw new MjsUnitAssertionError(
-        "Expected " + run + "() to throw " + errorType.name +
-        ", but threw '" + actual + "'");
-  if (message !== void 0 && actual.message !== message)
-    throw new MjsUnitAssertionError(
-        "Expected " + run + "() to throw '" + message + "', but threw '" +
-        actual.message + "'");
-};
-
-function assertEqualsAsync(expected, run, msg) {
-  var actual;
-  var hadValue = false;
-  var hadError = false;
-  var promise = run();
-
-  if (typeof promise !== "object" || typeof promise.then !== "function") {
-    throw new MjsUnitAssertionError(
-        "Expected " + run.toString() +
-        " to return a Promise, but it returned " + PrettyPrint(promise));
-  }
-
-  promise.then(function(value) { hadValue = true; actual = value; },
-               function(error) { hadError = true; actual = error; });
-
-  assertFalse(hadValue || hadError);
-
-  %RunMicrotasks();
-
-  if (hadError) throw actual;
-
-  assertTrue(
-      hadValue, "Expected '" + run.toString() + "' to produce a value");
-
-  assertEquals(expected, actual, msg);
-};
-
-assertEquals(undefined, this.AsyncFunction);
-let AsyncFunction = (async function() {}).constructor;
-
-// The AsyncFunction Constructor is the %AsyncFunction% intrinsic object and
-// is a subclass of Function.
-// (https://tc39.github.io/ecmascript-asyncawait/#async-function-constructor)
-assertEquals(Object.getPrototypeOf(AsyncFunction), Function);
-assertEquals(Object.getPrototypeOf(AsyncFunction.prototype),
-             Function.prototype);
-assertTrue(async function() {} instanceof Function);
-
-
-// Let functionPrototype be the intrinsic object %AsyncFunctionPrototype%.
-async function asyncFunctionForProto() {}
-assertEquals(AsyncFunction.prototype,
-             Object.getPrototypeOf(asyncFunctionForProto));
-assertEquals(AsyncFunction.prototype,
-             Object.getPrototypeOf(async function() {}));
-assertEquals(AsyncFunction.prototype, Object.getPrototypeOf(async () => {}));
-assertEquals(AsyncFunction.prototype,
-             Object.getPrototypeOf({ async method() {} }.method));
-assertEquals(AsyncFunction.prototype, Object.getPrototypeOf(AsyncFunction()));
-assertEquals(AsyncFunction.prototype,
-             Object.getPrototypeOf(new AsyncFunction()));
-
-// AsyncFunctionCreate does not produce an object with a Prototype
-assertEquals(undefined, asyncFunctionForProto.prototype);
-assertEquals(false, asyncFunctionForProto.hasOwnProperty("prototype"));
-assertEquals(undefined, (async function() {}).prototype);
-assertEquals(false, (async function() {}).hasOwnProperty("prototype"));
-assertEquals(undefined, (async() => {}).prototype);
-assertEquals(false, (async() => {}).hasOwnProperty("prototype"));
-assertEquals(undefined, ({ async method() {} }).method.prototype);
-assertEquals(false, ({ async method() {} }).method.hasOwnProperty("prototype"));
-assertEquals(undefined, AsyncFunction().prototype);
-assertEquals(false, AsyncFunction().hasOwnProperty("prototype"));
-assertEquals(undefined, (new AsyncFunction()).prototype);
-assertEquals(false, (new AsyncFunction()).hasOwnProperty("prototype"));
-
-assertEquals(1, async function(a) { await 1; }.length);
-assertEquals(2, async function(a, b) { await 1; }.length);
-assertEquals(1, async function(a, b = 2) { await 1; }.length);
-assertEquals(2, async function(a, b, ...c) { await 1; }.length);
-
-assertEquals(1, (async(a) => await 1).length);
-assertEquals(2, (async(a, b) => await 1).length);
-assertEquals(1, (async(a, b = 2) => await 1).length);
-assertEquals(2, (async(a, b, ...c) => await 1).length);
-
-assertEquals(1, ({ async f(a) { await 1; } }).f.length);
-assertEquals(2, ({ async f(a, b) { await 1; } }).f.length);
-assertEquals(1, ({ async f(a, b = 2) { await 1; } }).f.length);
-assertEquals(2, ({ async f(a, b, ...c) { await 1; } }).f.length);
-
-assertEquals(1, AsyncFunction("a", "await 1").length);
-assertEquals(2, AsyncFunction("a", "b", "await 1").length);
-assertEquals(1, AsyncFunction("a", "b = 2", "await 1").length);
-assertEquals(2, AsyncFunction("a", "b", "...c", "await 1").length);
-
-assertEquals(1, (new AsyncFunction("a", "await 1")).length);
-assertEquals(2, (new AsyncFunction("a", "b", "await 1")).length);
-assertEquals(1, (new AsyncFunction("a", "b = 2", "await 1")).length);
-assertEquals(2, (new AsyncFunction("a", "b", "...c", "await 1")).length);
-
-// AsyncFunction.prototype[ @@toStringTag ]
-var descriptor =
-    Object.getOwnPropertyDescriptor(AsyncFunction.prototype,
-                                    Symbol.toStringTag);
-assertEquals("AsyncFunction", descriptor.value);
-assertEquals(false, descriptor.enumerable);
-assertEquals(false, descriptor.writable);
-assertEquals(true, descriptor.configurable);
-
-assertEquals(1, AsyncFunction.length);
-
-// Let F be ! FunctionAllocate(functionPrototype, Strict, "non-constructor")
-async function asyncNonConstructorDecl() {}
-assertThrows(() => new asyncNonConstructorDecl(), TypeError);
-assertThrows(() => asyncNonConstructorDecl.caller, TypeError);
-assertThrows(() => asyncNonConstructorDecl.arguments, TypeError);
-
-assertThrows(() => new (async function() {}), TypeError);
-assertThrows(() => (async function() {}).caller, TypeError);
-assertThrows(() => (async function() {}).arguments, TypeError);
-
-assertThrows(
-    () => new ({ async nonConstructor() {} }).nonConstructor(), TypeError);
-assertThrows(
-    () => ({ async nonConstructor() {} }).nonConstructor.caller, TypeError);
-assertThrows(
-    () => ({ async nonConstructor() {} }).nonConstructor.arguments, TypeError);
-
-assertThrows(() => new (() => "not a constructor!"), TypeError);
-assertThrows(() => (() => 1).caller, TypeError);
-assertThrows(() => (() => 1).arguments, TypeError);
-
-assertThrows(() => new (AsyncFunction()), TypeError);
-assertThrows(() => AsyncFunction().caller, TypeError);
-assertThrows(() => AsyncFunction().arguments, TypeError);
-
-assertThrows(() => new (new AsyncFunction()), TypeError);
-assertThrows(() => (new AsyncFunction()).caller, TypeError);
-assertThrows(() => (new AsyncFunction()).arguments, TypeError);
-
-// Normal completion
-async function asyncDecl() { return "test"; }
-assertEqualsAsync("test", asyncDecl);
-assertEqualsAsync("test2", async function() { return "test2"; });
-assertEqualsAsync("test3", async () => "test3");
-assertEqualsAsync("test4", () => ({ async f() { return "test4"; } }).f());
-assertEqualsAsync("test5", () => AsyncFunction("no", "return 'test' + no;")(5));
-assertEqualsAsync("test6",
-                  () => (new AsyncFunction("no", "return 'test' + no;"))(6));
-
-class MyError extends Error {};
-
-// Throw completion
-async function asyncDeclThrower(e) { throw new MyError(e); }
-assertThrowsAsync(() => asyncDeclThrower("boom!"), MyError, "boom!");
-assertThrowsAsync(
-  () => (async function(e) { throw new MyError(e); })("boom!!!"),
-  MyError, "boom!!!");
-assertThrowsAsync(
-  () => (async e => { throw new MyError(e) })("boom!!"), MyError, "boom!!");
-assertThrowsAsync(
-  () => ({ async thrower(e) { throw new MyError(e); } }).thrower("boom!1!"),
-  MyError, "boom!1!");
-assertThrowsAsync(
-  () => AsyncFunction("msg", "throw new MyError(msg)")("boom!2!!"),
-  MyError, "boom!2!!");
-assertThrowsAsync(
-  () => (new AsyncFunction("msg", "throw new MyError(msg)"))("boom!2!!!"),
-  MyError, "boom!2!!!");
-
-function resolveLater(value) { return Promise.resolve(value); }
-function rejectLater(error) { return Promise.reject(error); }
-
-// Resume after Normal completion
-var log = [];
-async function resumeAfterNormal(value) {
-  log.push("start:" + value);
-  value = await resolveLater(value + 1);
-  log.push("resume:" + value);
-  value = await resolveLater(value + 1);
-  log.push("resume:" + value);
-  return value + 1;
-}
-
-assertEqualsAsync(4, () => resumeAfterNormal(1));
-assertEquals("start:1 resume:2 resume:3", log.join(" "));
-
-var O = {
-  async resumeAfterNormal(value) {
-    log.push("start:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    return value + 1;
-  }
-};
-log = [];
-assertEqualsAsync(5, () => O.resumeAfterNormal(2));
-assertEquals("start:2 resume:3 resume:4", log.join(" "));
-
-var resumeAfterNormalArrow = async (value) => {
-  log.push("start:" + value);
-  value = await resolveLater(value + 1);
-  log.push("resume:" + value);
-  value = await resolveLater(value + 1);
-  log.push("resume:" + value);
-  return value + 1;
-};
-log = [];
-assertEqualsAsync(6, () => resumeAfterNormalArrow(3));
-assertEquals("start:3 resume:4 resume:5", log.join(" "));
-
-var resumeAfterNormalEval = AsyncFunction("value", `
-    log.push("start:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    return value + 1;`);
-log = [];
-assertEqualsAsync(7, () => resumeAfterNormalEval(4));
-assertEquals("start:4 resume:5 resume:6", log.join(" "));
-
-var resumeAfterNormalNewEval = new AsyncFunction("value", `
-    log.push("start:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    value = await resolveLater(value + 1);
-    log.push("resume:" + value);
-    return value + 1;`);
-log = [];
-assertEqualsAsync(8, () => resumeAfterNormalNewEval(5));
-assertEquals("start:5 resume:6 resume:7", log.join(" "));
-
-// Resume after Throw completion
-async function resumeAfterThrow(value) {
-  log.push("start:" + value);
-  try {
-    value = await rejectLater("throw1");
-  } catch (e) {
-    log.push("resume:" + e);
-  }
-  try {
-    value = await rejectLater("throw2");
-  } catch (e) {
-    log.push("resume:" + e);
-  }
-  return value + 1;
-}
-
-log = [];
-assertEqualsAsync(2, () => resumeAfterThrow(1));
-assertEquals("start:1 resume:throw1 resume:throw2", log.join(" "));
-
-var O = {
-  async resumeAfterThrow(value) {
-    log.push("start:" + value);
-    try {
-      value = await rejectLater("throw1");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    try {
-      value = await rejectLater("throw2");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    return value + 1;
-  }
-}
-log = [];
-assertEqualsAsync(3, () => O.resumeAfterThrow(2));
-assertEquals("start:2 resume:throw1 resume:throw2", log.join(" "));
-
-var resumeAfterThrowArrow = async (value) => {
-  log.push("start:" + value);
-  try {
-    value = await rejectLater("throw1");
-  } catch (e) {
-    log.push("resume:" + e);
-  }
-  try {
-    value = await rejectLater("throw2");
-  } catch (e) {
-    log.push("resume:" + e);
-  }
- return value + 1;
-};
-
-log = [];
-
-assertEqualsAsync(4, () => resumeAfterThrowArrow(3));
-assertEquals("start:3 resume:throw1 resume:throw2", log.join(" "));
-
-var resumeAfterThrowEval = AsyncFunction("value", `
-    log.push("start:" + value);
-    try {
-      value = await rejectLater("throw1");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    try {
-      value = await rejectLater("throw2");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    return value + 1;`);
-log = [];
-assertEqualsAsync(5, () => resumeAfterThrowEval(4));
-assertEquals("start:4 resume:throw1 resume:throw2", log.join(" "));
-
-var resumeAfterThrowNewEval = new AsyncFunction("value", `
-    log.push("start:" + value);
-    try {
-      value = await rejectLater("throw1");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    try {
-      value = await rejectLater("throw2");
-    } catch (e) {
-      log.push("resume:" + e);
-    }
-    return value + 1;`);
-log = [];
-assertEqualsAsync(6, () => resumeAfterThrowNewEval(5));
-assertEquals("start:5 resume:throw1 resume:throw2", log.join(" "));
-
-async function foo() {}
-assertEquals("async function foo() {}", foo.toString());
-assertEquals("async function () {}", async function () {}.toString());
-assertEquals("async x => x", (async x => x).toString());
-assertEquals("async x => { return x }", (async x => { return x }).toString());
-class AsyncMethod { async foo() { } }
-assertEquals("async foo() { }",
-             Function.prototype.toString.call(AsyncMethod.prototype.foo));
-assertEquals("async foo() { }",
-             Function.prototype.toString.call({async foo() { }}.foo));
-
-// Async functions are not constructible
-assertThrows(() => class extends (async function() {}) {}, TypeError);
-
-// Regress v8:5148
-assertEqualsAsync("1", () => (async({ a = NaN }) => a)({ a: "1" }));
-assertEqualsAsync(
-    "10", () => (async(foo, { a = NaN }) => foo + a)("1", { a: "0" }));
-assertEqualsAsync("2", () => (async({ a = "2" }) => a)({ a: undefined }));
-assertEqualsAsync(
-    "20", () => (async(foo, { a = "0" }) => foo + a)("2", { a: undefined }));
-assertThrows(() => eval("async({ foo = 1 })"), SyntaxError);
-assertThrows(() => eval("async(a, { foo = 1 })"), SyntaxError);
-
-// https://bugs.chromium.org/p/chromium/issues/detail?id=638019
-async function gaga() {
-  let i = 1;
-  while (i-- > 0) { await 42 }
-}
-assertDoesNotThrow(gaga);