Random data generation in Postman - Test Execution Trace

Test Overview

This test sends a POST request with randomly generated user data to an API endpoint. It verifies that the response status is 201 Created and that the response body contains the same random name and email sent.

Test Code - Postman

Postman

pm.test("Create user with random data", function () {
    const randomName = pm.variables.replaceIn("{{$randomFullName}}")
    const randomEmail = pm.variables.replaceIn("{{$randomEmail}}")

    const requestBody = {
        name: randomName,
        email: randomEmail
    };

    pm.sendRequest({
        url: pm.environment.get("apiUrl") + "/users",
        method: 'POST',
        header: {
            'Content-Type': 'application/json'
        },
        body: {
            mode: 'raw',
            raw: JSON.stringify(requestBody)
        }
    }, function (err, res) {
        pm.expect(err).to.be.null;
        pm.expect(res).to.have.property('code', 201);
        const jsonData = res.json();
        pm.expect(jsonData).to.have.property('name', randomName);
        pm.expect(jsonData).to.have.property('email', randomEmail);
    });
});

Execution Trace - 6 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Postman test runner is ready	-	PASS
2	Generate random full name and email using Postman dynamic variables	Random values assigned to variables randomName and randomEmail	-	PASS
3	Send POST request to API endpoint /users with JSON body containing randomName and randomEmail	Request sent to server with random user data	-	PASS
4	Receive response from server	Response received with HTTP status code and JSON body	Check response status code is 201	PASS
5	Parse response JSON and verify 'name' and 'email' fields match sent random data	Response JSON parsed and fields compared	Assert response.name == randomName and response.email == randomEmail	PASS
6	Test ends	Test completed successfully	-	PASS

Failure Scenario

Failing Condition: API returns status code other than 201 or response body does not contain matching name and email

Execution Trace Quiz - 3 Questions

What does the test verify after sending the POST request?

A Response status is 200 and response body is empty

B Request body contains fixed user data

C Response status is 201 and response body contains the same random name and email

D Response status is 404 Not Found

Key Result

Always verify that the response from an API matches the random data sent in the request to ensure the API processes input correctly.