x-www-form-urlencoded body in Postman - Test Execution Trace

Test Overview

This test sends a POST request with an x-www-form-urlencoded body to an API endpoint and verifies the response status and body content.

Test Code - Postman

Postman

pm.test("POST request with x-www-form-urlencoded body", function () {
    pm.sendRequest({
        url: 'https://postman-echo.com/post',
        method: 'POST',
        header: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: {
            mode: 'urlencoded',
            urlencoded: [
                { key: 'username', value: 'testuser' },
                { key: 'password', value: 'testpass' }
            ]
        }
    }, function (err, res) {
        pm.expect(err).to.be.null;
        pm.expect(res).to.have.property('code', 200);
        const jsonData = res.json();
        pm.expect(jsonData.form).to.have.property('username', 'testuser');
        pm.expect(jsonData.form).to.have.property('password', 'testpass');
    });
});

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts: Prepare POST request with x-www-form-urlencoded body containing username and password	Postman environment ready to send request	-	PASS
2	Send POST request to https://postman-echo.com/post with Content-Type header set to application/x-www-form-urlencoded	Request sent, waiting for response	-	PASS
3	Receive response from server	Response received with status code 200 and JSON body	Check response status code is 200	PASS
4	Parse JSON response body and verify form data contains username and password with correct values	Response JSON parsed: form data includes username='testuser' and password='testpass'	Assert form.username == 'testuser' and form.password == 'testpass'	PASS
5	Test completes successfully	All assertions passed, test finished	-	PASS

Failure Scenario

Failing Condition: Response status code is not 200 or form data does not contain expected username and password

Execution Trace Quiz - 3 Questions

What header is essential to set when sending an x-www-form-urlencoded POST request?

A Content-Type: application/json

B Content-Type: application/x-www-form-urlencoded

C Accept: text/html

D Authorization: Bearer token

Key Result

Always set the correct Content-Type header when sending form data and verify the server echoes back the expected form fields to ensure the request was processed correctly.