JSTests/test262/test/built-ins/RegExp/prototype/Symbol.replace/exec-invocation.js

// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
description: Invocation of `exec` method
es6id: 21.2.5.8
info: |
    [...]
    13. Repeat, while done is false
        a. Let result be RegExpExec(rx, S).
        [...]

    21.2.5.2.1 Runtime Semantics: RegExpExec ( R, S )

    [...]
    3. Let exec be Get(R, "exec").
    4. ReturnIfAbrupt(exec).
    5. If IsCallable(exec) is true, then
       a. Let result be Call(exec, R, «S»).
features: [Symbol.replace]
---*/

var r = /./;
var callCount = 0;
var arg = {
  toString: function() {
    return 'string form';
  }
};
var thisValue, args;

r.exec = function() {
  thisValue = this;
  args = arguments;
  callCount += 1;
  return null;
};

r[Symbol.replace](arg, '');

assert.sameValue(callCount, 1);
assert.sameValue(thisValue, r);
assert.sameValue(args.length, 1);
assert.sameValue(args[0], 'string form');