/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* * * Date: 09 November 2002 * SUMMARY: Test that interpreter can handle string literals exceeding 64K * See http://bugzilla.mozilla.org/show_bug.cgi?id=179068 * * Test that the interpreter can handle string literals exceeding 64K limit. * For that the script passes to eval() "str ='LONG_STRING_LITERAL';" where * LONG_STRING_LITERAL is a string with 200K chars. * * Igor Bukanov explains the technique used below: * * > Philip Schwartau wrote: * >... * > Here is the heart of the testcase: * > * > // Generate 200K long string * > var long_str = duplicate(LONG_STR_SEED, N); * > var str = ""; * > eval("str='".concat(long_str, "';")); * > var test_is_ok = (str.length == LONG_STR_SEED.length * N); * > * > * > The testcase creates two identical strings, |long_str| and |str|. It * > uses eval() simply to assign the value of |long_str| to |str|. Why is * > it necessary to have the variable |str|, then? Why not just create * > |long_str| and test it? Wouldn't this be enough: * > * > // Generate 200K long string * > var long_str = duplicate(LONG_STR_SEED, N); * > var test_is_ok = (long_str.length == LONG_STR_SEED.length * N); * > * > Or do we specifically need to test eval() to exercise the interpreter? * * The reason for eval is to test string literals like in 'a string literal * with 100 000 characters...', Rhino deals fine with strings generated at * run time where lengths > 64K. Without eval it would be necessary to have * a test file excedding 64K which is not that polite for CVS and then a * special treatment for the compiled mode in Rhino should be added. * * * > * > If so, is it important to use the concat() method in the assignment, as * > you have done: |eval("str='".concat(long_str, "';"))|, or can we simply * > do |eval("str = long_str;")| ? * * The concat is a replacement for eval("str='"+long_str+"';"), but as * long_str is huge, this leads to constructing first a new string via * "str='"+long_str and then another one via ("str='"+long_str) + "';" * which takes time under JDK 1.1 on a something like StrongArm 200MHz. * Calling concat makes less copies, that is why it is used in the * duplicate function and this is faster then doing recursion like in the * test case to test that 64K different string literals can be handled. *
*/ //----------------------------------------------------------------------------- var UBound = 0; var BUGNUMBER = 179068; var summary = 'Test that interpreter can handle string literals exceeding 64K'; var status = ''; var statusitems = []; var actual = ''; var actualvalues = []; var expect= ''; var expectedvalues = []; var LONG_STR_SEED = "0123456789"; var N = 20 * 1024; var str = "";
// Generate 200K long string and assign it to |str| via eval() var long_str = duplicate(LONG_STR_SEED, N);
eval("str='".concat(long_str, "';"));
status = inSection(1);
actual = str.length == LONG_STR_SEED.length * N
expect = true;
addThis();
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