js/src/tests/test262/built-ins/RegExp/prototype/source/value-empty.js


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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.
/*---
esid: sec-get-regexp.prototype.source
description: >
  Return value can be used to create an equivalent RegExp when the
  [[OriginalSource]] internal slot is the empty string

  21.2.3.2.4 Runtime Semantics: EscapeRegExpPattern

  [...] the internal procedure that would result from evaluating S as a
  Pattern[~U] (Pattern[+U] if F contains "u") must behave identically to the
  internal procedure given by the constructed object's [[RegExpMatcher]]
  internal slot.
info: |
  [...]
  5. Let src be R.[[OriginalSource]].
  6. Let flags be R.[[OriginalFlags]].
  7. Return EscapeRegExpPattern(src, flags).
---*/

var re = eval('/' + new RegExp('').source + '/');

assert.sameValue(re.test(''), true);

reportCompare(0, 0);