LayoutTests/js/mozilla/strict/script-tests/8.7.2.js

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/licenses/publicdomain/
 */

/*
 * These tests depend on the fact that testLenientAndStrict tries the
 * strict case first; otherwise, the non-strict evaluation creates the
 * variable. Ugh. Ideally, we would use evalcx, but that's not
 * available in the browser.
 */

/* Assigning to an undeclared variable should fail in strict mode. */
assertEq(testLenientAndStrict('undeclared=1',
                              completesNormally,
                              raisesException(ReferenceError)),
         true);

/*
 * Assigning to a var-declared variable should be okay in strict and
 * lenient modes.
 */
assertEq(testLenientAndStrict('var var_declared; var_declared=1',
                              completesNormally,
                              completesNormally),
         true);

/*
 * We mustn't report errors until the code is actually run; the variable
 * could be created in the mean time.
 */
assertEq(testLenientAndStrict('undeclared_at_compiletime=1',
                              parsesSuccessfully,
                              parsesSuccessfully),
         true);

function obj() {
  var o = { x: 1, y: 1 };
  Object.defineProperty(o, 'x', { writable: false });
  return o;
}

/* Put EXPR in a strict mode code context with 'with' bindings in scope. */
function in_strict_with(expr) {
  return "with(obj()) { (function () { 'use strict'; " + expr + " })(); }";
}

assertEq(raisesException(TypeError)(in_strict_with('x = 2; y = 2;')), true);
assertEq(raisesException(TypeError)(in_strict_with('x++;')), true);
assertEq(raisesException(TypeError)(in_strict_with('++x;')), true);
assertEq(raisesException(TypeError)(in_strict_with('x--;')), true);
assertEq(raisesException(TypeError)(in_strict_with('--x;')), true);

reportCompare(true, true);

var successfullyParsed = true;