text: // Copyright 2008 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Test that array join calls toString on subarrays.
  var a = [[1,2],3,4,[5,6]];
  assertEquals('1,2345,6', a.join(''));
  assertEquals('1,2*3*4*5,6', a.join('*'));
  assertEquals('1,2**3**4**5,6', a.join('**'));
  assertEquals('1,2****3****4****5,6', a.join('****'));
  assertEquals('1,2********3********4********5,6', a.join('********'));
  assertEquals('1,2**********3**********4**********5,6', a.join('**********'));
  
  // Create a cycle.
  a.push(a);
  assertEquals('1,2345,6', a.join(''));
  assertEquals('1,2*3*4*5,6*', a.join('*'));
  assertEquals('1,2**3**4**5,6**', a.join('**'));
  assertEquals('1,2****3****4****5,6****', a.join('****'));
  assertEquals('1,2********3********4********5,6********', a.join('********'));
  assertEquals('1,2**********3**********4**********5,6**********', a.join('**********'));
  
  // Replace array.prototype.toString.
  var oldToString = Array.prototype.toString;
  Array.prototype.toString = function() { return "array"; };
  assertEquals('array34arrayarray', a.join(''));
  assertEquals('array*3*4*array*array', a.join('*'));
  assertEquals('array**3**4**array**array', a.join('**'));
  assertEquals('array****3****4****array****array', a.join('****'));
  assertEquals('array********3********4********array********array', a.join('********'));
  assertEquals('array**********3**********4**********array**********array', a.join('**********'));
  
  Array.prototype.toString = function() { throw 42; };
  assertThrows("a.join('')");
  assertThrows("a.join('*')");
  assertThrows("a.join('**')");
  assertThrows("a.join('****')");
  assertThrows("a.join('********')");
  assertThrows("a.join('**********')");
  
  Array.prototype.toString = function() { return "array"; };
  assertEquals('array34arrayarray', a.join(''));
  assertEquals('array*3*4*array*array', a.join('*'));
  assertEquals('array**3**4**array**array', a.join('**'));
  assertEquals('array****3****4****array****array', a.join('****'));
  assertEquals('array********3********4********array********array', a.join('********'));
  assertEquals('array**********3**********4**********array**********array', a.join('**********'));
  
  // Restore original toString.
  delete Array.prototype.toString;
  if (Array.prototype.toString != oldToString) {
    Array.prototype.toString = oldToString;
  }
  
  var a = new Array(123123123);
  assertEquals(123123122, String(a).length);
  assertEquals(123123122, a.join(",").length);
  assertEquals(246246244, a.join("oo").length);
  
  a = new Array(Math.pow(2,32) - 1);  // Max length.
  assertEquals("", a.join(""));
  a[123123123] = "o";
  a[1255215215] = "p";
  assertEquals("op", a.join(""));
  
  a = new Array(100001);
  for (var i = 0; i < a.length; i++) a[i] = undefined;
  a[5] = "ab";
  a[90000] = "cd";
  assertEquals("abcd", a.join(""));  // Must not throw.