add Promise.try tests

features.txt

@@ -105,6 +105,10 @@ iterator-helpers
 # https://github.com/tc39/proposal-promise-with-resolvers
 promise-with-resolvers
 
+# Promise.try
+# https://github.com/tc39/proposal-promise-try
+promise-try
+
 # Set methods
 # https://github.com/tc39/proposal-set-methods
 set-methods

test/built-ins/Promise/race/resolved-sequence-with-rejections.js

@@ -21,7 +21,7 @@ info: |
     Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], resultCapability.[[Reject]] »).
 
 flags: [async]
-includes: [compareArray.js,promiseHelper.js]
+includes: [compareArray.js, promiseHelper.js]
 ---*/
 
 let a = new Promise((_, reject) => reject('a'));

test/built-ins/Promise/try/args.js

@@ -0,0 +1,21 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try forwards arguments
+esid: sec-promise.try
+features: [promise-try, async]
+includes: [asyncHelpers.js, compareArray.js]
+---*/
+
+var sentinel = { sentinel: true };
+
+asyncTest(
+  Promise.try(function () {
+    assert.compareArray(
+      Array.prototype.slice.call(arguments),
+      [1, 2, Test262Error, sentinel]
+    );
+  }, 1, 2, Test262Error, sentinel)
+);
+

test/built-ins/Promise/try/ctx-ctor-throws.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    `Promise.try` invoked on a constructor value that throws an error
+features: [promise-try]
+---*/
+
+var CustomPromise = function () {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function () {
+  Promise.try.call(CustomPromise, function () {});
+});

test/built-ins/Promise/try/ctx-ctor.js

@@ -0,0 +1,27 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try produces instances of the receiver
+esid: sec-promise.try
+features: [promise-try, class]
+---*/
+
+var executor = null;
+var callCount = 0;
+
+class SubPromise extends Promise {
+  constructor(a) {
+    super(a);
+    executor = a;
+    callCount += 1;
+  }
+}
+
+var instance = Promise.try.call(SubPromise, function () {});
+
+assert.sameValue(instance.promise.constructor, SubPromise);
+assert.sameValue(instance.promise instanceof SubPromise, true);
+
+assert.sameValue(callCount, 1);
+assert.sameValue(typeof executor, 'function');

test/built-ins/Promise/try/ctx-non-ctor.js

@@ -0,0 +1,12 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try errors when the receiver is not a constructor
+esid: sec-promise.try
+features: [promise-try]
+---*/
+
+assert.throws(TypeError, function () {
+  Promise.try.call(eval);
+});

test/built-ins/Promise/try/ctx-non-object.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try errors when the receiver is not an object
+esid: sec-promise.try
+features: [promise-try]
+---*/
+
+assert.throws(TypeError, function () {
+  Promise.try.call(undefined);
+});
+
+assert.throws(TypeError, function () {
+  Promise.try.call(null);
+});
+
+assert.throws(TypeError, function () {
+  Promise.try.call(86);
+});
+
+assert.throws(TypeError, function () {
+  Promise.try.call('string');
+});
+
+assert.throws(TypeError, function () {
+  Promise.try.call(true);
+});
+
+assert.throws(TypeError, function () {
+  Promise.try.call(Symbol());
+});

test/built-ins/Promise/try/length.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: Promise.try `length` property
+includes: [propertyHelper.js]
+features: [promise-try]
+---*/
+
+verifyProperty(Promise.try, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});

test/built-ins/Promise/try/name.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: Promise.try `name` property
+includes: [propertyHelper.js]
+features: [promise-try]
+---*/
+
+verifyProperty(Promise.try, "name", {
+  value: "try",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});

test/built-ins/Promise/try/not-a-constructor.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+  Promise.try does not implement [[Construct]], is not new-able
+includes: [isConstructor.js]
+features: [Reflect.construct, promise-try]
+---*/
+
+assert.sameValue(isConstructor(Promise.try), false, 'isConstructor(Promise.all) must return false');
+
+assert.throws(TypeError, function () {
+  new Promise.try(function () {});
+});
+

test/built-ins/Promise/try/promise.js

@@ -0,0 +1,12 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try return value is a Promise
+features: [promise-try]
+---*/
+
+var instance = Promise.try(function () {});
+
+assert.sameValue(instance.constructor, Promise);
+assert.sameValue(instance instanceof Promise, true);

test/built-ins/Promise/try/prop-desc.js

@@ -0,0 +1,16 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// See LICENSE for details.
+
+/*---
+author: Jordan Harband
+description: Promise.try property descriptor
+features: [promise-try]
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Promise, 'try', {
+  value: Promise.try,
+  writable: true,
+  enumerable: false,
+  configurable: true
+})

test/built-ins/Promise/try/return-value.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try returns a Promise resolved to the callback's return value
+esid: sec-promise.try
+features: [promise-try, async]
+includes: [asyncHelpers.js]
+---*/
+
+var sentinel = { sentinel: true };
+
+asyncTest(
+  Promise.try(function () {
+    return sentinel;
+  }).then(function (v) {
+    assert.sameValue(v, sentinel);
+  })
+);
+

test/built-ins/Promise/try/throws.js

@@ -0,0 +1,17 @@
+// Copyright (C) 2024 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Promise.try returns a Promise that rejects when the function throws
+esid: sec-promise.try
+features: [promise-try, async]
+includes: [asyncHelpers.js]
+---*/
+
+assert.throwsAsync(
+  Test262Error,
+  function () {
+    Promise.try(function () { throw new Test262Error(); })
+  },
+  "error thrown from callback must become a rejection"
+);

test/built-ins/Promise/withResolvers/ctx-ctor.js

@@ -4,7 +4,7 @@
 /*---
 description: Promise.withResolvers produces instances of the receiver
 esid: sec-promise.withresolvers
-features: [promise-with-resolvers]
+features: [promise-with-resolvers, class]
 ---*/
 
 class SubPromise extends Promise {}