Add tests for rejected %AsyncIteratorPrototype%.@@asyncDispose

Author: Sosuke Suzuki

test/built-ins/AsyncIteratorPrototype/Symbol.asyncDispose/throw-rejected-return.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2025 Sosuke Suzuki. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%asynciteratorprototype%-@@asyncDispose
+description: %AsyncIteratorPrototype%.@@asyncDispose should rejects if `return` returns rejected promise
+info: |
+  %AsyncIteratorPrototype% [ @@asyncDispose ] ( )
+
+  ...
+  6. Else,
+    a. Let result be Call(return, O, « undefined »).
+    b. IfAbruptRejectPromise(result, promiseCapability).
+    ...
+
+features: [explicit-resource-management]
+includes: [asyncHelpers.js]
+---*/
+
+async function* generator() {}
+const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(generator.prototype));
+
+var returnCount = 0;
+
+function CatchError() {}
+
+const obj = {
+  return() {
+    returnCount++;
+    return Promise.reject(new CatchError());
+  }
+};
+
+asyncTest(async function () {
+  await assert.throwsAsync(CatchError, function () {
+    return AsyncIteratorPrototype[Symbol.asyncDispose].call(obj);
+  }, "Promise should be rejected");
+  assert.sameValue(returnCount, 1);
+});

test/built-ins/AsyncIteratorPrototype/Symbol.asyncDispose/throw-return-getter.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2025 Sosuke Suzuki. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%asynciteratorprototype%-@@asyncDispose
+description: %AsyncIteratorPrototype%.@@asyncDispose should rejects if `return` getter throws
+info: |
+  %AsyncIteratorPrototype% [ @@asyncDispose ] ( )
+
+  1. Let O be the this value.
+  2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
+  3. Let return be GetMethod(O, "return").
+  4. IfAbruptRejectPromise(return, promiseCapability).
+  ...
+
+features: [explicit-resource-management]
+includes: [asyncHelpers.js]
+---*/
+
+async function* generator() {}
+const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(generator.prototype));
+
+var returnGetCount = 0;
+
+function CatchError() {}
+
+const obj = {
+  get return() {
+    returnGetCount++;
+    throw new CatchError();
+  }
+};
+
+asyncTest(async function () {
+  await assert.throwsAsync(CatchError, function () {
+    return AsyncIteratorPrototype[Symbol.asyncDispose].call(obj);
+  }, "Promise should be rejected");
+  assert.sameValue(returnGetCount, 1);
+});

test/built-ins/AsyncIteratorPrototype/Symbol.asyncDispose/throw-return.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2025 Sosuke Suzuki. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%asynciteratorprototype%-@@asyncDispose
+description: %AsyncIteratorPrototype%.@@asyncDispose should rejects if `return` throws
+info: |
+  %AsyncIteratorPrototype% [ @@asyncDispose ] ( )
+
+  ...
+  6. Else,
+    a. Let result be Call(return, O, « undefined »).
+    b. IfAbruptRejectPromise(result, promiseCapability).
+    ...
+
+features: [explicit-resource-management]
+includes: [asyncHelpers.js]
+---*/
+
+async function* generator() {}
+const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(generator.prototype));
+
+var returnCount = 0;
+
+function CatchError() {}
+
+const obj = {
+  return() {
+    returnCount++;
+    throw new CatchError();
+  }
+};
+
+asyncTest(async function () {
+  await assert.throwsAsync(CatchError, function () {
+    return AsyncIteratorPrototype[Symbol.asyncDispose].call(obj);
+  }, "Promise should be rejected");
+  assert.sameValue(returnCount, 1);
+});