test262/test/built-ins/Number/string-numeric-separator-literal-dds-dot-dd-nsl-dd-ep-dd.js

// Copyright (C) 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: prod-NumericLiteralSeparator
description: NumericLiteralSeparator is not valid on string conversions for ToNumber operations
info: |
  DecimalDigits `.` DecimalDigits NumericLiteralSeparator DecimalDigits
  ExponentPart SignedInteger

  NumericLiteralSeparator ::
    _

  DecimalLiteral ::
    . DecimalDigits ExponentPart_opt

  DecimalDigits ::
    ...
    DecimalDigits NumericLiteralSeparator DecimalDigit

  ExponentIndicator :: one of
    e E

features: [numeric-separator-literal]
---*/

assert.sameValue(Number("10.00_01e2"), NaN, "10.00_01e2");