Output block in Postman

Introduction

An output block in Postman shows the results of your test scripts after running a request. It helps you see if your tests passed or failed.

After sending an API request to check if the response is correct

When you want to verify that your test scripts are working as expected

To quickly see errors or success messages from your tests

When debugging your API tests to find issues

To confirm that your assertions match the API response

Syntax

Postman

// Example of test script output in Postman
pm.test('Status code is 200', function () {
    pm.response.to.have.status(200);
});

console.log('Test completed');

The output block shows results from pm.test() assertions and console.log() messages.

You can view the output block in the Postman app under the Test Results tab after running a request.

Examples

This test checks if the API response time is under 500 milliseconds.

Postman

pm.test('Response time is less than 500ms', function () {
    pm.expect(pm.response.responseTime).to.be.below(500);
});

This test verifies that the response body is in JSON format.

Postman

pm.test('Response has JSON body', function () {
    pm.response.to.be.json();
});

This prints the response status code to the output block for debugging.

Postman

console.log('Response status:', pm.response.code);

Sample Program

This script runs two tests: one checks if the status code is 200, the other checks if the response JSON has a userId property. It also logs a message to the output block.

Postman

// Test script in Postman
pm.test('Status code is 200', function () {
    pm.response.to.have.status(200);
});

pm.test('Response body has userId', function () {
    const jsonData = pm.response.json();
    pm.expect(jsonData).to.have.property('userId');
});

console.log('Tests finished');

Important Notes

Use pm.test() to create tests that show pass or fail in the output block.

Use console.log() to print helpful messages or variable values for debugging.

The output block updates only after you send the request and run the tests.

Summary

The output block shows test results and logs after running a request.

It helps you quickly see if your API tests passed or failed.

Use it to debug and verify your test scripts in Postman.