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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.4.3
description: Subclassing the Promise object
info: |
25.4.3 The Promise Constructor
...
The Promise constructor is designed to be subclassable. It may be used as the
value in an extends clause of a class definition. Subclass constructors that
intend to inherit the specified Promise behaviour must include a super call
to the Promise constructor to create and initialize the subclass instance with
the internal state necessary to support the Promise and Promise.prototype
built-in methods.
---*/
class Prom extends Promise {}
assert.throws(TypeError, function() {
new Prom();
});
var calledExecutor = false;
var executorArguments;
var prom1 = new Prom(function() {
calledExecutor = true;
executorArguments = arguments;
});
assert(calledExecutor);
assert.sameValue(executorArguments.length, 2);
assert.sameValue(typeof executorArguments[0], "function");
assert.sameValue(typeof executorArguments[1], "function");
reportCompare(0, 0);
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