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// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/**
* The production x += y is the same as x = x + y
*
* @path ch11/11.13/11.13.2/S11.13.2_A4.4_T1.3.js
* @description Type(x) and Type(y) vary between Null and Undefined
*/
//CHECK#1
x = null;
x += undefined;
if (isNaN(x) !== true) {
$ERROR('#1: x = null; x += undefined; x === Not-a-Number. Actual: ' + (x));
}
//CHECK#2
x = undefined;
x += null;
if (isNaN(x) !== true) {
$ERROR('#2: x = undefined; x += null; x === Not-a-Number. Actual: ' + (x));
}
//CHECK#3
x = undefined;
x += undefined;
if (isNaN(x) !== true) {
$ERROR('#3: x = undefined; x += undefined; x === Not-a-Number. Actual: ' + (x));
}
//CHECK#4
x = null;
x += null;
if (x !== 0) {
$ERROR('#4: x = null; x += null; x === 0. Actual: ' + (x));
}
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