Postman trick and tips: How to run a specific iteration data from Newman

There is no inbuilt way to specify a specific iteration row to be executed using Newman, but can be done using Powershell or by using Newman as a library.

The approaches are as below

Powershell:

here we read the actual csv file in the current directory using import csv

Then considers only row 1..2 , if you just want 1 row you can change $a[1..2] to $[1]

$a= Import-Csv .\a.csv
$a[1..2] | Select-Object * | export-csv -Path .\temp.csv -NoTypeInformation
newman run .\test.postman_collection.json -d .\temp.csv

As library:

here we read and split the csv as we want using csv parser and then write it back to a temp file as csv using csv-stringify library.

First, install:

npm install csv
npm install fs
npm i fs-extra
npm install newman

Then use the below code

const newman = require('newman'); // require newman in your project
const stringify = require('csv-stringify')
const parse = require('csv-parse/lib/sync')
const fs = require("fs")
// call newman.run to pass `options` object and wait for callback
let data = fs.readFileSync('./a.csv',
    { encoding…