Source code

Revision control

Copy as Markdown

Other Tools

// Copyright (C) 2017 Robin Templeton. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-abstract-equality-comparison
description: Object operands coerced without ToPrimitive hint
info: |
7.2.14 Abstract Equality Comparison
...
6. If Type(x) is Boolean, return the result of the comparison !
ToNumber(x) == y.
7. If Type(y) is Boolean, return the result of the comparison x == !
ToNumber(y).
8. If Type(x) is either String, Number, or Symbol and Type(y) is
Object, return the result of the comparison x == ToPrimitive(y).
9. If Type(x) is Object and Type(y) is either String, Number, or
Symbol, return the result of the comparison ToPrimitive(x) == y.
...
features: [Symbol.toPrimitive]
---*/
let count = 0;
let obj = {
[Symbol.toPrimitive](hint) {
count += 1;
assert.sameValue(hint, "default");
return 1;
}
};
assert.sameValue(true == obj, true);
assert.sameValue(count, 1);
assert.sameValue(obj == true, true);
assert.sameValue(count, 2);
reportCompare(0, 0);