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Test for the difference between toFixed and toString 

This test comes from a note in the specification under toFixed.
It fails in ChakraCore and passes in other engines that I tested.
This commit is contained in:
Daniel Ehrenberg 2017-03-23 19:05:32 +01:00
parent 975e54de17
commit e9a745646a
1 changed files with 19 additions and 0 deletions
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19
test/built-ins/Number/prototype/toFixed/exactness.js vendored Normal file
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// Copyright (C) 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-number.prototype.tofixed
description: Number.prototype.toFixed does not use ToString's cleaner rounding
info: >
Number.prototype.toFixed ( fractionDigits )
...
8. Else x < 10^21,
a. Let n be an integer for which the exact mathematical value of n ÷ 10f - x is as close to zero as possible. If there are two such n, pick the larger n.
b. If n = 0, let m be the String "0". Otherwise, let m be the String consisting of the digits of the decimal representation of n (in order, with no leading zeroes).
...
---*/
// Test from a note in the specification
assert.sameValue((1000000000000000128).toString(0), "1000000000000000100");
assert.sameValue((1000000000000000128).toFixed(0), "1000000000000000128");