JS closure to return object instance as interface

Question

I have the following code.

function Test() {
this.funct_1 = function() {
    alert('funct_1');
}

this.funct_2 = function() {
    alert('funct_2');
}
return this;}

---

function getTestObj() {
var testObj;
if (!testObj) {
    testObj = new Test();
}
return function() {
    return testObj;
}}

What I'm trying to accomplish is the following. I want to have a class Test which is not singleton. Then in some other places in my application I need to have a function which could return the same instance per script execution. I figured that I could use closure for that getTestObj.

However, when I try to use it

getTestObj().funct_1();

I'm getting the following error, saying the funct_1() is not found.

Cannot find function funct_1 in object function () {...}.

Clearly, I'm making some kind of mistake here, but I'm not able to find any solution over the net which could help me. Would appreciate any comments.

NOTE: I'm forced to use ECMA5

Answer 1

testObj is wrapped inside a function

So, either call it

getTestObj()().funct_1(); //notice two ()()

Save the value of getTestObj() in a variable

var singleTon = getTestObj();
var testObj = singleTon();
testObj.funct_1();

Or, simply return testObj (in case singleTon isn't required)

function getTestObj() 
{
   var testObj;
   if (!testObj) {
      testObj = new Test();
   }
   return testObj;
}

And invoke it as

getTestObj().funct_1(); //notice single ()