Bug 1317389: Change property attributes for generator and async functions to match ES2015/2017.

Tag #1287

1 files changed, 76 insertions, 0 deletions

diff --git a/js/src/tests/ecma_2017/AsyncFunctions/properties.js b/js/src/tests/ecma_2017/AsyncFunctions/properties.js
new file mode 100644
index 000000000..ca383901b
--- /dev/null
+++ b/js/src/tests/ecma_2017/AsyncFunctions/properties.js
@@ -0,0 +1,76 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function assertOwnDescriptor(object, propertyKey, expected) {
+  var desc = Object.getOwnPropertyDescriptor(object, propertyKey);
+  if (desc === undefined) {
+    assertEq(expected, undefined, "Property shouldn't be present");
+    return;
+  }
+
+  assertEq(desc.enumerable, expected.enumerable, `${String(propertyKey)}.[[Enumerable]]`);
+  assertEq(desc.configurable, expected.configurable, `${String(propertyKey)}.[[Configurable]]`);
+
+  if (Object.prototype.hasOwnProperty.call(desc, "value")) {
+    assertEq(desc.value, expected.value, `${String(propertyKey)}.[[Value]]`);
+    assertEq(desc.writable, expected.writable, `${String(propertyKey)}.[[Writable]]`);
+  } else {
+    assertEq(desc.get, expected.get, `${String(propertyKey)}.[[Get]]`);
+    assertEq(desc.set, expected.set, `${String(propertyKey)}.[[Set]]`);
+  }
+}
+
+async function asyncFunc(){}
+var AsyncFunctionPrototype = Object.getPrototypeOf(asyncFunc);
+var AsyncFunction = AsyncFunctionPrototype.constructor;
+
+
+// ES2017, 25.5.2 Properties of the AsyncFunction Constructor
+
+assertEqArray(Object.getOwnPropertyNames(AsyncFunction).sort(), ["length", "name", "prototype"]);
+assertEqArray(Object.getOwnPropertySymbols(AsyncFunction), []);
+
+assertOwnDescriptor(AsyncFunction, "length", {
+    value: 1, writable: false, enumerable: false, configurable: true
+});
+
+assertOwnDescriptor(AsyncFunction, "name", {
+    value: "AsyncFunction", writable: false, enumerable: false, configurable: true
+});
+
+assertOwnDescriptor(AsyncFunction, "prototype", {
+    value: AsyncFunctionPrototype, writable: false, enumerable: false, configurable: false
+});
+
+
+// ES2017, 25.5.3 Properties of the AsyncFunction Prototype Object
+
+assertEqArray(Object.getOwnPropertyNames(AsyncFunctionPrototype).sort(), ["constructor"]);
+assertEqArray(Object.getOwnPropertySymbols(AsyncFunctionPrototype), [Symbol.toStringTag]);
+
+assertOwnDescriptor(AsyncFunctionPrototype, "constructor", {
+    value: AsyncFunction, writable: false, enumerable: false, configurable: true
+});
+
+assertOwnDescriptor(AsyncFunctionPrototype, Symbol.toStringTag, {
+    value: "AsyncFunction", writable: false, enumerable: false, configurable: true
+});
+
+
+// ES2017, 25.5.4 AsyncFunction Instances
+
+assertEqArray(Object.getOwnPropertyNames(asyncFunc).sort(), ["length", "name"]);
+assertEqArray(Object.getOwnPropertySymbols(asyncFunc), []);
+
+assertOwnDescriptor(asyncFunc, "length", {
+    value: 0, writable: false, enumerable: false, configurable: true
+});
+
+assertOwnDescriptor(asyncFunc, "name", {
+    value: "asyncFunc", writable: false, enumerable: false, configurable: true
+});
+
+
+if (typeof reportCompare == "function")
+    reportCompare(true, true);