Iterating Over Data Files in Tests
Accessing Data Values in Scripts
When a run uses a data file, each iteration's values are available in scripts through pm.iterationData.get("variableName"), letting you reference the current row's data directly.
Tracking Iteration Progress
pm.info.iteration returns the current iteration number, which is useful for logging or for conditionally changing behavior on specific rows.
Validating Per-Iteration Results
| Task | How |
|---|---|
| Compare expected vs actual | Read expected value from data file, compare to response |
| Skip a row conditionally | Use pm.execution.setNextRequest() |
| Log iteration details | console.log with pm.info.iteration |
Reviewing Results Across Iterations
The Runner summary shows pass/fail results for every iteration separately, making it easy to spot which specific data row caused a failure.
Beyond one-time runs, Postman can also keep testing your API automatically over time - let's look at monitors and alerts.
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