test/mjsunit/deep-recursion.js

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/**
 * @fileoverview Check that flattening deep trees of cons strings does not
 * cause stack overflows.
 */

function newdeep(start, depth) {
  var d = start;
  for (var i = 0; i < depth; i++) {
    d = d + "f";
  }
  return d;
}

var default_depth = 110000;

var deep = newdeep("foo", default_depth);
assertEquals('f', deep[0]);

var cmp1 = newdeep("a", default_depth);
var cmp2 = newdeep("b", default_depth);

assertEquals(-1, cmp1.localeCompare(cmp2), "ab");

var cmp2empty = newdeep("c", default_depth);
assertTrue(cmp2empty.localeCompare("") > 0, "c");

var cmp3empty = newdeep("d", default_depth);
assertTrue("".localeCompare(cmp3empty) < 0), "d";

var slicer_depth = 1100;

var slicer = newdeep("slice", slicer_depth);

for (i = 0; i < slicer_depth + 4; i += 2) {
  slicer =  slicer.slice(1, -1);
}

assertEquals("f", slicer[0]);
assertEquals(1, slicer.length);