text: // Copyright 2009 the Sputnik authors.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  info: The production x += y is the same as x = x + y
  es5id: 11.13.2_A4.4_T2.7
  description: >
      Type(x) is different from Type(y) and both types vary between
      String (primitive or object) and Boolean (primitive and object)
  ---*/
  
  //CHECK#1
  x = true;
  x += "1";
  if (x !== "true1") {
    $ERROR('#1: x = true; x += "1"; x === "true1". Actual: ' + (x));
  }
  
  //CHECK#2
  x = "1";
  x += true;
  if (x !== "1true") {
    $ERROR('#2: x = "1"; x += true; x === "1true". Actual: ' + (x));
  }
  
  //CHECK#3
  x = new Boolean(true);
  x += "1";
  if (x !== "true1") {
    $ERROR('#3: x = new Boolean(true); x += "1"; x === "true1". Actual: ' + (x));
  }
  
  //CHECK#4
  x = "1";
  x += new Boolean(true);
  if (x !== "1true") {
    $ERROR('#4: x = "1"; x += new Boolean(true); x === "1true". Actual: ' + (x));
  }
  
  //CHECK#5
  x = true;
  x += new String("1");
  if (x !== "true1") {
    $ERROR('#5: x = true; x += new String("1"); x === "true1". Actual: ' + (x));
  }
  
  //CHECK#6
  x = new String("1");
  x += true;
  if (x !== "1true") {
    $ERROR('#6: x = new String("1"); x += true; x === "1true". Actual: ' + (x));
  }
  
  //CHECK#7
  x = new Boolean(true);
  x += new String("1");
  if (x !== "true1") {
    $ERROR('#7: x = new Boolean(true); x += new String("1"); x === "true1". Actual: ' + (x));
  }
  
  //CHECK#8
  x = new String("1");
  x += new Boolean(true);
  if (x !== "1true") {
    $ERROR('#8: x = new String("1"); x += new Boolean(true); x === "1true". Actual: ' + (x));
  }
  