resolve-poisoned-then.js (1304B)
1 // |reftest| async 2 // Copyright (C) 2015 the V8 project authors. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 /*--- 5 description: Resolving with an object with a "poisoned" `then` property 6 es6id: 25.4.4.3 7 info: | 8 [...] 9 6. Let promiseCapability be NewPromiseCapability(C). 10 [...] 11 11. Let result be PerformPromiseRace(iteratorRecord, promiseCapability, C). 12 [...] 13 14 25.4.4.3.1 Runtime Semantics: PerformPromiseRace 15 1. Repeat 16 [...] 17 j. Let result be Invoke(nextPromise, "then", 18 «promiseCapability.[[Resolve]], promiseCapability.[[Reject]]»). 19 20 25.4.1.3.2 Promise Resolve Functions 21 [...] 22 8. Let then be Get(resolution, "then"). 23 9. If then is an abrupt completion, then 24 a. Return RejectPromise(promise, then.[[value]]). 25 flags: [async] 26 ---*/ 27 28 var value = {}; 29 var poisonedThen = Object.defineProperty({}, 'then', { 30 get: function() { 31 throw value; 32 } 33 }); 34 var thenable = { 35 then: function(resolve) { 36 resolve(poisonedThen); 37 } 38 }; 39 40 Promise.race([thenable]) 41 .then(function() { 42 $DONE('The promise should not be fulfilled.'); 43 }, function(val) { 44 if (val !== value) { 45 $DONE('The promise should be rejected with the correct value.'); 46 return; 47 } 48 $DONE(); 49 });