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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: 14.1.6
description: >
Default parameters' effect on function length
info: |
Function length is counted by the non initialized parameters in the left.
9.2.4 FunctionInitialize (F, kind, ParameterList, Body, Scope)
[...]
2. Let len be the ExpectedArgumentCount of ParameterList.
3. Perform ! DefinePropertyOrThrow(F, "length", PropertyDescriptor{[[Value]]:
len, [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true}).
[...]
FormalsList : FormalParameter
1. If HasInitializer of FormalParameter is true return 0
2. Return 1.
FormalsList : FormalsList , FormalParameter
1. Let count be the ExpectedArgumentCount of FormalsList.
2. If HasInitializer of FormalsList is true or HasInitializer of
FormalParameter is true, return count.
3. Return count+1.
features: [default-parameters]
includes: [propertyHelper.js]
---*/
var m1 = class { static m(x = 42) {} }.m;
assert.sameValue(m1.length, 0, 'formalslist: x = 42');
verifyNotEnumerable(m1, 'length');
verifyNotWritable(m1, 'length');
verifyConfigurable(m1, 'length');
var m2 = class { static m(x = 42, y) {} }.m;
assert.sameValue(m2.length, 0, 'formalslist: x = 42, y');
verifyNotEnumerable(m2, 'length');
verifyNotWritable(m2, 'length');
verifyConfigurable(m2, 'length');
var m3 = class { static m(x, y = 42) {} }.m;
assert.sameValue(m3.length, 1, 'formalslist: x, y = 42');
verifyNotEnumerable(m3, 'length');
verifyNotWritable(m3, 'length');
verifyConfigurable(m3, 'length');
var m4 = class { static m(x, y = 42, z) {} }.m;
assert.sameValue(m4.length, 1, 'formalslist: x, y = 42, z');
verifyNotEnumerable(m4, 'length');
verifyNotWritable(m4, 'length');
verifyConfigurable(m4, 'length');
reportCompare(0, 0);
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