Add AsyncIteratorClose tests

test/language/statements/for-await-of/iterator-close-non-throw-get-method-abrupt.js

@@ -0,0 +1,53 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asynciteratorclose
+description: >
+  If retrieving an iterator's `return` method generates an error while
+  closing the iterator with non-throw completion, the error should be
+  forwarded to the runtime.
+info: |
+  AsyncIteratorClose ( iteratorRecord, completion )
+
+  [...]
+  4. Let innerResult be GetMethod(iterator, "return").
+  5. If innerResult.[[Type]] is normal,
+    [...]
+  6. If completion.[[Type]] is throw, return Completion(completion).
+  7. If innerResult.[[Type]] is throw, return Completion(innerResult).
+
+  GetMethod ( V, P )
+
+  [...]
+  2. Let func be ? GetV(V, P).
+features: [async-iteration]
+flags: [async]
+---*/
+
+const innerError = { name: "inner error" };
+const asyncIterable = {};
+asyncIterable[Symbol.asyncIterator] = function() {
+  return {
+    next: function() {
+      return { done: false, value: null };
+    },
+    get return() {
+      throw innerError;
+    },
+  };
+};
+
+let iterationCount = 0;
+const promise = (async function() {
+  for await (const x of asyncIterable) {
+    iterationCount += 1;
+    break;
+  }
+})();
+
+promise.then(function(value) {
+  throw new Test262Error("Promise should be rejected, got: " + value);
+}, function(error) {
+  assert.sameValue(error, innerError);
+  assert.sameValue(iterationCount, 1, "The loop body is evaluated");
+}).then($DONE, $DONE);

test/language/statements/for-await-of/iterator-close-non-throw-get-method-non-callable.js

@@ -0,0 +1,52 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asynciteratorclose
+description: >
+  If retrieving an iterator's `return` method generates an error while
+  closing the iterator with non-throw completion, the error should be
+  forwarded to the runtime.
+info: |
+  AsyncIteratorClose ( iteratorRecord, completion )
+
+  [...]
+  4. Let innerResult be GetMethod(iterator, "return").
+  5. If innerResult.[[Type]] is normal,
+    [...]
+  6. If completion.[[Type]] is throw, return Completion(completion).
+  7. If innerResult.[[Type]] is throw, return Completion(innerResult).
+
+  GetMethod ( V, P )
+
+  [...]
+  2. Let func be ? GetV(V, P).
+  3. If func is either undefined or null, return undefined.
+  4. If IsCallable(func) is false, throw a TypeError exception.
+features: [async-iteration]
+flags: [async]
+---*/
+
+const asyncIterable = {};
+asyncIterable[Symbol.asyncIterator] = function() {
+  return {
+    next: function() {
+      return { done: false, value: null };
+    },
+    return: Symbol(),
+  };
+};
+
+let iterationCount = 0;
+const promise = (async function() {
+  for await (const x of asyncIterable) {
+    iterationCount += 1;
+    break;
+  }
+})();
+
+promise.then(function(value) {
+  throw new Test262Error("Promise should be rejected, got: " + value);
+}, function(error) {
+  assert.sameValue(error.constructor, TypeError);
+  assert.sameValue(iterationCount, 1, "The loop body is evaluated");
+}).then($DONE, $DONE);

test/language/statements/for-await-of/iterator-close-throw-get-method-abrupt.js

@@ -0,0 +1,51 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asynciteratorclose
+description: >
+  If retrieving an iterator's `return` method generates an error while
+  closing the iterator with throw completion, this error should be suppressed.
+info: |
+  AsyncIteratorClose ( iteratorRecord, completion )
+
+  [...]
+  4. Let innerResult be GetMethod(iterator, "return").
+  5. If innerResult.[[Type]] is normal,
+    [...]
+  6. If completion.[[Type]] is throw, return Completion(completion).
+  7. If innerResult.[[Type]] is throw, return Completion(innerResult).
+
+  GetMethod ( V, P )
+
+  [...]
+  2. Let func be ? GetV(V, P).
+features: [async-iteration]
+flags: [async]
+---*/
+
+const asyncIterable = {};
+asyncIterable[Symbol.asyncIterator] = function() {
+  return {
+    next: function() {
+      return { done: false, value: null };
+    },
+    get return() {
+      throw { name: "inner error" };
+    },
+  };
+};
+
+let iterationCount = 0;
+const promise = (async function() {
+  for await (const x of asyncIterable) {
+    iterationCount += 1;
+    throw new Test262Error("should not be overriden");
+  }
+})();
+
+promise.then(function(value) {
+  throw new Test262Error("Promise should be rejected, got: " + value);
+}, function(error) {
+  assert.sameValue(error.constructor, Test262Error);
+  assert.sameValue(iterationCount, 1, "The loop body is evaluated");
+}).then($DONE, $DONE);

test/language/statements/for-await-of/iterator-close-throw-get-method-non-callable.js

@@ -0,0 +1,51 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asynciteratorclose
+description: >
+  If retrieving an iterator's `return` method generates an error while
+  closing the iterator with throw completion, this error should be suppressed.
+info: |
+  AsyncIteratorClose ( iteratorRecord, completion )
+
+  [...]
+  4. Let innerResult be GetMethod(iterator, "return").
+  5. If innerResult.[[Type]] is normal,
+    [...]
+  6. If completion.[[Type]] is throw, return Completion(completion).
+  7. If innerResult.[[Type]] is throw, return Completion(innerResult).
+
+  GetMethod ( V, P )
+
+  [...]
+  2. Let func be ? GetV(V, P).
+  3. If func is either undefined or null, return undefined.
+  4. If IsCallable(func) is false, throw a TypeError exception.
+features: [async-iteration]
+flags: [async]
+---*/
+
+const asyncIterable = {};
+asyncIterable[Symbol.asyncIterator] = function() {
+  return {
+    next: function() {
+      return { done: false, value: null };
+    },
+    return: true,
+  };
+};
+
+let iterationCount = 0;
+const promise = (async function() {
+  for await (const x of asyncIterable) {
+    iterationCount += 1;
+    throw new Test262Error("should not be overriden");
+  }
+})();
+
+promise.then(function(value) {
+  throw new Test262Error("Promise should be rejected, got: " + value);
+}, function(error) {
+  assert.sameValue(error.constructor, Test262Error);
+  assert.sameValue(iterationCount, 1, "The loop body is evaluated");
+}).then($DONE, $DONE);