Global variables in Postman - Test Execution Trace

Test Overview

This test verifies that a global variable in Postman is set correctly and can be accessed in a subsequent request. It checks that the variable value matches the expected string.

Test Code - Postman Sandbox

Postman

pm.test("Set and verify global variable", function () {
    pm.globals.set("userToken", "abc123token");
    const token = pm.globals.get("userToken");
    pm.expect(token).to.eql("abc123token");
});

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test script starts execution in Postman Sandbox	Postman test environment ready to run script	-	PASS
2	Set global variable 'userToken' to 'abc123token' using pm.globals.set	Global variables now include userToken = 'abc123token'	-	PASS
3	Retrieve global variable 'userToken' using pm.globals.get	Variable 'token' assigned value 'abc123token'	-	PASS
4	Assert that retrieved token equals 'abc123token' using pm.expect	Assertion compares 'abc123token' to 'abc123token'	pm.expect(token).to.eql('abc123token')	PASS
5	Test script completes successfully	Test result recorded as pass	-	PASS

Failure Scenario

Failing Condition: Global variable 'userToken' is not set or has a different value

Execution Trace Quiz - 3 Questions

What does pm.globals.set("userToken", "abc123token") do in the test?

A Retrieves the global variable 'userToken'

B Stores the value 'abc123token' as a global variable named 'userToken'

C Deletes the global variable 'userToken'

D Runs an HTTP request with 'userToken' as a header

Key Result

Always verify that global variables are set before accessing them to avoid undefined values causing test failures.