v8/test/mjsunit/string-replace-with-empty.js

// Copyright 2010 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --expose-externalize-string --expose-gc

function test() {
  assertEquals("0123", "aa0bb1cc2dd3".replace(/[a-z]/g, ""));
  assertEquals("0123", "\u1234a0bb1cc2dd3".replace(/[\u1234a-z]/g, ""));

  var expected = "0123";
  var cons = "a0b1c2d3";
  for (var i = 0; i < 5; i++) {
    expected += expected;
    cons += cons;
  }
  assertEquals(expected, cons.replace(/[a-z]/g, ""));
  cons = "\u12340b1c2d3";
  for (var i = 0; i < 5; i++) {
    cons += cons;
  }
  assertEquals(expected, cons.replace(/[\u1234a-z]/g, ""));

  cons = "a0b1c2d3";
  for (var i = 0; i < 5; i++) {
    cons += cons;
  }
  externalizeString(cons, true/* force two-byte */);
  assertEquals(expected, cons.replace(/[a-z]/g, ""));
  cons = "\u12340b1c2d3";
  for (var i = 0; i < 5; i++) {
    cons += cons;
  }
  externalizeString(cons);
  assertEquals(expected, cons.replace(/[\u1234a-z]/g, ""));
}

test();

// Clear the regexp cache to allow the GC to work.
"foo".replace(/foo/g, "");

// GC in order to free up things on the C side so we don't get
// a memory leak.  This makes valgrind happy.
gc();
gc();