How to set numeric value in environment variable

Question

Problem: I want to set a counter variable (a numeric value) in environment variable, so in "Test" we can control the flow.

My experiment: I wrote a simple API call with following-

Prescript sets the counter variable-

postman.setEnvironmentVariable("mycounter", 1);

Test verifies the counter variable, if its value equals to 1, increment it by one-

if (postman.getEnvironmentVariable("mycounter") == 1 ) {

    postman.setEnvironmentVariable("result", "YES");       
    postman.setEnvironmentVariable("mycounter", 
        1+postman.getEnvironmentVariable("mycounter")); 
} 
else {
    postman.setEnvironmentVariable("result", "NO"); 
}

But when i check the value for "mycounter"-

Actual value: 11
Expected value: 2

Can anybody point out how to set numeric value in environment variable?

score 16 · Accepted Answer · edited Jun 09 '17 at 09:03

16

I got workaround. By using Number function convert string to integer.

So

if (postman.getEnvironmentVariable("mycounter") == 1 ) {
    postman.setEnvironmentVariable("result", "YES");
    postman.setEnvironmentVariable("mycounter", 1+Number(postman.getEnvironmentVariable("mycounter")));  
} else {
    postman.setEnvironmentVariable("result", "NO"); 
}

edited Jun 09 '17 at 09:03

mrroboaat

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answered Jun 02 '17 at 20:15

Sam

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1

I tried same while setting the counter variable, but it did not work. So looks like environment variable always set as String irrespective what type we are sending. Can anybody please confirm my assumption? – Sam Jun 02 '17 at 20:18

score 5 · Answer 2 · answered Jun 09 '17 at 09:11

I think the sam's answer works but here is a cleaner way I use in one of my pre-request scripts

let myCounter = +environment["mycounter"];  // '+' Convert String into Integer
if (myCounter == 1) {
    myCounter++;
    postman.setEnvironmentVariable("result", "YES");
    postman.setEnvironmentVariable("mycounter", myCounter);  
} else {
    postman.setEnvironmentVariable("result", "NO"); 
}

More informations about converting ==> https://stackoverflow.com/a/1133814/1646479

score 2 · Answer 3 · answered Mar 13 '20 at 10:18

With the new Postman API pm:

let myCounter = pm.environment.get("mycounter");
if (myCounter == 1 ) {
    pm.environment.set("result", "YES");
    pm.environment.set("mycounter", 1+Number(myCounter));  
} else {
    pm.environment.set("result", "NO"); 
}

the old postman. API is going to be deprecated and will be removed in future.

How to set numeric value in environment variable

3 Answers3