Capitalize the first letter of each json response key in Postman Tests

[bencook16]

My question: How do I capitalize the first letter of each json response key in Postman Tests?

Details (like screenshots): I tried experimenting with some answers here and on StackOverflow already and my current attempt looks like this

const jsonData = pm.response.json();

for(var key in jsonData){
return key.charAt(0).toUpperCase() + key.slice(1);
}

console.log(jsonData);

How I found the problem:

The response body in the console still shows this

{
“abc”: “N”,
“quoteNum”: null,
“blahCreated”: “N”,
“insId”: null,
“quoteNum2”: null
}
when I want it to look like

{
“Abc”: “N”,
“QuoteNum”: null,
“BlahCreated”: “N”,
“InsId”: null,
“QuoteNum2”: null
}

[michaelderekjones (Mike Jones)]

First comment I would like to make is that you have set jsonData as a constant.

Therefore, you can’t change the info in it. It’s read only.

Change the variable type to something you can update.

[bencook16]

Thanks for your idea MD. I first tried replacing const with let, then let with var and saw the same response body in the Console tab at the bottom left of the desktop.

Then I added

console.log(“Hey”);

and didn’t see Hey in the console

[michaelderekjones (Mike Jones)]

You’re missing the semicolon on the previous line to separate the statements.

[bencook16]

What do you mean by previous line? In my screenshot from around 40 minutes ago, I checked to make sure I had all the semicolons to end statements.

[sbettwieser]

No console text is printed likely because the return in your for loop terminates the test script.

[bencook16]

Thank you, I now see the console logs and I see that the logic I built for capitalizing the first letter of keys isn’t working. Do you see what I might try instead?

[michaelderekjones (Mike Jones)]

@bencook16

The following seems to work…

// const jsonData = pm.response.json();

var jsonData = {
"abc": "N",
"quoteNum": null,
"blahCreated": "N",
"insId": null,
"quoteNum2": null
};

console.log("before...............................");
console.log(jsonData); 

for(var key in jsonData){
 delete Object.assign(jsonData, {[key.charAt(0).toUpperCase() + key.slice(1)]: jsonData[key] })[key];
}

console.log("after...............................");
console.log(jsonData); 

[bencook16]

That worked, thank you Mike!