diff --git a/test/built-ins/Promise/prototype/then/ctor-access-count.js b/test/built-ins/Promise/prototype/then/ctor-access-count.js new file mode 100644 index 0000000000000000000000000000000000000000..e01e593cd63a02e5220418a4b71a361806d7245b --- /dev/null +++ b/test/built-ins/Promise/prototype/then/ctor-access-count.js @@ -0,0 +1,48 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 25.4.5.3 +description: The instance's `constructor` property is accessed exactly once +info: > + 1. Let promise be the this value. + 2. If IsPromise(promise) is false, throw a TypeError exception. + 3. Let C be SpeciesConstructor(promise, %Promise%). + 4. ReturnIfAbrupt(C). + 5. Let resultCapability be NewPromiseCapability(C). + 6. ReturnIfAbrupt(resultCapability). + 7. Return PerformPromiseThen(promise, onFulfilled, onRejected, + resultCapability). + + 7.3.20 SpeciesConstructor ( O, defaultConstructor ) + + 1. Assert: Type(O) is Object. + 2. Let C be Get(O, "constructor"). + 3. ReturnIfAbrupt(C). + 4. If C is undefined, return defaultConstructor. + 5. If Type(C) is not Object, throw a TypeError exception. + 6. Let S be Get(C, @@species). + 7. ReturnIfAbrupt(S). + 8. If S is either undefined or null, return defaultConstructor. + 9. If IsConstructor(S) is true, return S. + 10. Throw a TypeError exception. +---*/ + +var callCount = 0; +var prms = new Promise(function(resolve) { resolve(); }); +Object.defineProperty(prms, 'constructor', { + get: function() { + callCount += 1; + return Promise; + } +}); + +prms.then(function() { + if (callCount !== 1) { + $DONE('Expected constructor access count: 1. Actual: ' + callCount); + return; + } + + $DONE(); + }, function() { + $DONE('The promise should not be rejected.'); + });