src/third_party/mozjs-45/js/src/tests/test262/ch11/11.13/11.13.2/S11.13.2_A4.4_T2.6.js

// 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_T2.6.js
 * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and String (primitive and object)
 */

//CHECK#1
x = "1";
x += 1;
if (x !== "11") {
  $ERROR('#1: x = "1"; x += 1; x === "11". Actual: ' + (x));
}

//CHECK#2
x = 1;
x += "1";
if (x !== "11") {
  $ERROR('#2: x = 1; x += "1"; x === "11". Actual: ' + (x));
}

//CHECK#3
x = new String("1");
x += 1;
if (x !== "11") {
  $ERROR('#3: x = new String("1"); x += 1; x === "11". Actual: ' + (x));
}

//CHECK#4
x = 1;
x += new String("1");
if (x !== "11") {
  $ERROR('#4: x = 1; x += new String("1"); x === "11". Actual: ' + (x));
}

//CHECK#5
x = "1";
x += new Number(1);
if (x !== "11") {
  $ERROR('#5: x = "1"; x += new Number(1); x === "11". Actual: ' + (x));
}

//CHECK#6
x = new Number(1);
x += "1";
if (x !== "11") {
  $ERROR('#6: x = new Number(1); x += "1"; x === "11". Actual: ' + (x));
}

//CHECK#7
x = new String("1");
x += new Number(1);
if (x !== "11") {
  $ERROR('#7: x = new String("1"); x += new Number(1); x === "11". Actual: ' + (x));
}

//CHECK#8
x = new Number(1);
x += new String("1");
if (x !== "11") {
  $ERROR('#8: x = new Number(1); x += new String("1"); x === "11". Actual: ' + (x));
}

//CHECK#9
if ("x" + 1 !=="x1") {
  $ERROR('#9: x = "x"; x += 1; x === "x1". Actual: ' + (x));
}

//CHECK#10
x = 1;
x += "x";
if (x !== "1x") {
  $ERROR('#10: x = 1; x += "x"; x === "1x". Actual: ' + (x));
}