properties.js (2854B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 function assertOwnDescriptor(object, propertyKey, expected) { 6 var desc = Object.getOwnPropertyDescriptor(object, propertyKey); 7 if (desc === undefined) { 8 assertEq(expected, undefined, "Property shouldn't be present"); 9 return; 10 } 11 12 assertEq(desc.enumerable, expected.enumerable, `${String(propertyKey)}.[[Enumerable]]`); 13 assertEq(desc.configurable, expected.configurable, `${String(propertyKey)}.[[Configurable]]`); 14 15 if (Object.prototype.hasOwnProperty.call(desc, "value")) { 16 assertEq(desc.value, expected.value, `${String(propertyKey)}.[[Value]]`); 17 assertEq(desc.writable, expected.writable, `${String(propertyKey)}.[[Writable]]`); 18 } else { 19 assertEq(desc.get, expected.get, `${String(propertyKey)}.[[Get]]`); 20 assertEq(desc.set, expected.set, `${String(propertyKey)}.[[Set]]`); 21 } 22 } 23 24 async function asyncFunc(){} 25 var AsyncFunctionPrototype = Object.getPrototypeOf(asyncFunc); 26 var AsyncFunction = AsyncFunctionPrototype.constructor; 27 28 29 // ES2017, 25.5.2 Properties of the AsyncFunction Constructor 30 31 assertEqArray(Object.getOwnPropertyNames(AsyncFunction).sort(), ["length", "name", "prototype"]); 32 assertEqArray(Object.getOwnPropertySymbols(AsyncFunction), []); 33 34 assertOwnDescriptor(AsyncFunction, "length", { 35 value: 1, writable: false, enumerable: false, configurable: true 36 }); 37 38 assertOwnDescriptor(AsyncFunction, "name", { 39 value: "AsyncFunction", writable: false, enumerable: false, configurable: true 40 }); 41 42 assertOwnDescriptor(AsyncFunction, "prototype", { 43 value: AsyncFunctionPrototype, writable: false, enumerable: false, configurable: false 44 }); 45 46 47 // ES2017, 25.5.3 Properties of the AsyncFunction Prototype Object 48 49 assertEqArray(Object.getOwnPropertyNames(AsyncFunctionPrototype).sort(), ["constructor"]); 50 assertEqArray(Object.getOwnPropertySymbols(AsyncFunctionPrototype), [Symbol.toStringTag]); 51 52 assertOwnDescriptor(AsyncFunctionPrototype, "constructor", { 53 value: AsyncFunction, writable: false, enumerable: false, configurable: true 54 }); 55 56 assertOwnDescriptor(AsyncFunctionPrototype, Symbol.toStringTag, { 57 value: "AsyncFunction", writable: false, enumerable: false, configurable: true 58 }); 59 60 61 // ES2017, 25.5.4 AsyncFunction Instances 62 63 assertEqArray(Object.getOwnPropertyNames(asyncFunc).sort(), ["length", "name"]); 64 assertEqArray(Object.getOwnPropertySymbols(asyncFunc), []); 65 66 assertOwnDescriptor(asyncFunc, "length", { 67 value: 0, writable: false, enumerable: false, configurable: true 68 }); 69 70 assertOwnDescriptor(asyncFunc, "name", { 71 value: "asyncFunc", writable: false, enumerable: false, configurable: true 72 }); 73 74 75 if (typeof reportCompare == "function") 76 reportCompare(true, true);