// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-thenfinallyfunctions
description: >
valueThunk is anonymous built-in function with length of 1 that returns value.
info: |
Then Finally Functions
...
8. Let valueThunk be equivalent to a function that returns value.
9. Return ? Invoke(promise, "then", « valueThunk »).
The "length" property of a Then Finally function is 1.
features: [Promise.prototype.finally, Reflect.construct, arrow-function]
includes: [isConstructor.js]
flags: [async]
---*/
var value = {};
Promise.resolve(value)
.finally(function() {})
.then(() => $DONE(), $DONE);
var calls = 0;
var expected = [
{ length: 0, name: '' },
{ length: 1, name: '' }
];
var then = Promise.prototype.then;
Promise.prototype.then = function(resolve) {
assert.sameValue(isConstructor(resolve), false, 'isConstructor(resolve) must return false');
assert.throws(TypeError, () => {
new resolve();
});
assert.sameValue(
resolve.length,
expected[calls].length,
'The value of resolve.length is expected to equal the value of expected[calls].length'
);
assert.sameValue(
resolve.name,
expected[calls].name,
'The value of resolve.name is expected to equal the value of expected[calls].name'
);
if (calls === 0) {
assert.sameValue(resolve(), value, 'resolve() must return the value of value');
}
calls += 1;
return then.call(this, resolve);
};