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/* -*- 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: 14 Mar 2003
* SUMMARY: Testing left-associativity of the + operator
*
* See ECMA-262 Ed.3, Section 11.6.1, "The Addition operator"
* See http://bugzilla.mozilla.org/show_bug.cgi?id=196290
*
* The upshot: |a + b + c| should always equal |(a + b) + c|
*
*/
//-----------------------------------------------------------------------------
var UBound = 0;
var BUGNUMBER = 196290;
var summary = 'Testing left-associativity of the + operator';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
status = inSection(1);
actual = 1 + 1 + 'px';
expect = '2px';
addThis();
status = inSection(2);
actual = 'px' + 1 + 1;
expect = 'px11';
addThis();
status = inSection(3);
actual = 1 + 1 + 1 + 'px';
expect = '3px';
addThis();
status = inSection(4);
actual = 1 + 1 + 'a' + 1 + 1 + 'b';
expect = '2a11b';
addThis();
/*
* The next sections test the + operator via eval()
*/
status = inSection(5);
actual = sumThese(1, 1, 'a', 1, 1, 'b');
expect = '2a11b';
addThis();
status = inSection(6);
actual = sumThese(new Number(1), new Number(1), 'a');
expect = '2a';
addThis();
status = inSection(7);
actual = sumThese('a', new Number(1), new Number(1));
expect = 'a11';
addThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
/*
* Applies the + operator to the provided arguments via eval().
*
* Form an eval string of the form 'arg1 + arg2 + arg3', but
* remember to add double-quotes inside the eval string around
* any argument that is of string type. For example, suppose the
* arguments were 11, 'a', 22. Then the eval string should be
*
* arg1 + quoteThis(arg2) + arg3
*
* If we didn't put double-quotes around the string argument,
* we'd get this for an eval string:
*
* '11 + a + 22'
*
* If we eval() this, we get 'ReferenceError: a is not defined'.
* With proper quoting, we get eval('11 + "a" + 22') as desired.
*/
function sumThese()
{
var sEval = '';
var arg;
var i;
var L = arguments.length;
for (i=0; i<L; i++)
{
arg = arguments[i];
if (typeof arg === 'string')
arg = quoteThis(arg);
if (i < L-1)
sEval += arg + ' + ';
else
sEval += arg;
}
return eval(sEval);
}
function quoteThis(x)
{
return '"' + x + '"';
}
function test()
{
enterFunc('test');
printBugNumber(BUGNUMBER);
printStatus(summary);
for (var i=0; i<UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
exitFunc ('test');
}
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