JSTests/test262/test/language/expressions/concatenation/S9.8_A5_T2.js

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

/*---
info: |
    Result of String conversion from Object value is conversion
    from primitive value
es5id: 9.8_A5_T2
description: Some objects convert to String by implicit transformation
---*/

// CHECK#1
if (new Number() + "" !== "0") {
  throw new Test262Error('#1: new Number() + "" === "0". Actual: ' + (new Number() + ""));
}

// CHECK#2
if (new Number(0) + "" !== "0") {
  throw new Test262Error('#2: new Number(0) + "" === "0". Actual: ' + (new Number(0) + ""));
}

// CHECK#3
if (new Number(Number.NaN) + "" !== "NaN") {
  throw new Test262Error('#3: new Number(Number.NaN) + "" === "NaN". Actual: ' + (new Number(Number.NaN) + ""));
}

// CHECK#4
if (new Number(null) + "" !== "0") {
  throw new Test262Error('#4: new Number(null) + "" === "0". Actual: ' + (new Number(null) + "")); 
}

// CHECK#5
if (new Number(void 0) + "" !== "NaN") {
  throw new Test262Error('#5: new Number(void 0) + "" === "NaN. Actual: ' + (new Number(void 0) + ""));
}

// CHECK#6
if (new Number(true) + "" !== "1") {
  throw new Test262Error('#6: new Number(true) + "" === "1". Actual: ' + (new Number(true) + ""));
}

// CHECK#7
if (new Number(false) + "" !== "0") {
  throw new Test262Error('#7: new Number(false) + "" === "0". Actual: ' + (new Number(false) + ""));
}

// CHECK#8
if (new Boolean(true) + "" !== "true") {
  throw new Test262Error('#8: new Boolean(true) + "" === "true". Actual: ' + (new Boolean(true) + ""));
}

// CHECK#9
if (new Boolean(false) + "" !== "false") {
  throw new Test262Error('#9: Number(new Boolean(false)) === "false". Actual: ' + (Number(new Boolean(false))));
}

// CHECK#10
if (new Array(2,4,8,16,32) + "" !== "2,4,8,16,32") {
  throw new Test262Error('#10: new Array(2,4,8,16,32) + "" === "2,4,8,16,32". Actual: ' + (new Array(2,4,8,16,32) + ""));
}

// CHECK#11
var myobj1 = {
                toNumber : function(){return 12345;}, 
                toString : function(){return 67890;},
                valueOf  : function(){return "[object MyObj]";} 
            };

if (myobj1 + "" !== "[object MyObj]"){
  throw new Test262Error('#11: myobj1 + "" calls ToPrimitive with hint Number. Exptected: "[object MyObj]". Actual: ' + (myobj1 + ""));
}

// CHECK#12
var myobj2 = {
                toNumber : function(){return 12345;},
                toString : function(){return 67890}, 
                valueOf  : function(){return {}} 
            };

if (myobj2 + "" !== "67890"){
  throw new Test262Error('#12: myobj2 + "" calls ToPrimitive with hint Number. Exptected: "67890". Actual: ' + (myobj2 + ""));
}

// CHECK#13
var myobj3 = {
                toNumber : function(){return 12345;} 
            };

if (myobj3 + "" !== "[object Object]"){
  throw new Test262Error('#13: myobj3 + "" calls ToPrimitive with hint Number.  Exptected: "[object Object]". Actual: ' + (myobj3 + ""));
}