src/third_party/mozjs-45/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/**
 * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
 *
 * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js
 * @description Type(Primitive(x)) and Type(Primitive(y)) vary between primitive string and String object
 */

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

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

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

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

//CHECK#5
if ("x" + "1" !=="x1") {
  $ERROR('#5: "x" + "1" === "x1". Actual: ' + ("x" + "1"));
}

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