JS: 3 Newman Scripts (Postman CLI tool)

newman-as-node-module-write-to-disk.js

const fs = require('fs');
const process = require('process');
const newman = require('newman'); // require newman in your project
// call this as node newman-as-node-module-write-to-disk.js

// simpler: How can machine_name and port_number can be passed dynamically to the Postman tests when using Newman?
// newman run my-collection.json --global-var "machineName=mymachine1234" --global-var "machinePort=8080"
// In your request builder, just use them as normal variables https://{{machineName}}:{‌{machinePort}}.

// call newman.run to pass `options` object and wait for callback
newman.run({
    // environment, globals, iterationData...
    collection: require('./my.postman_collection.json'),
    reporters: 'cli'
}).on('beforeRequest', function (err, args) { // on start of run, log to console
    if(err) {
        console.error('beforeRequest: collection run encountered an error: ', err);
    } else {
        let fileName = new Date().toISOString().replace(/:/g, '-').replace(/\.\d+Z/g, '') + '.request.txt';
        fs.writeFile(fileName, args.request.body.raw, function(err) {
          if (err) console.log(err);
        });
        // only POST request body contains body.raw
        console.log('before request...', args.request.body.raw);
    }
}).on('request', function (err, summary) {
    if (err || summary.error) {
        console.error('collection run encountered an error.');
    }
    else {
        let fileName = new Date().toISOString().replace(/:/g, '-').replace(/\.\d+Z/g, '') + '.response.txt';
        fs.writeFile(fileName, summary.response.stream, 
          function(err) {
            if (err) console.log(err);
        });
        console.log('request completed.', summary.response.code, summary.response.stream.toString());
    }
});

newman-export-collection.js

var fs = require('fs'),
  Collection = require('postman-collection').Collection,
  myCollection;

  const my_coll = 'mdis-v3-test23-samplemgmt.postman_collection.json';
myCollection = new Collection(JSON.parse
  (fs.readFileSync(my_coll).toString()));

console.log(myCollection.toJSON());

postman-save-function-to-envvar.js

let save_path_variables = () => {
    /* array of path variables */
    const path_variables = JSON.parse(JSON.stringify(pm.request.url));
    let idx = 0;
    for (prop of path_variables.variable){    
        if (prop.key === var_name && Number.isInteger(prop.value)){        
            pm.environment.set(`pathvar_${prop.key}`, prop.value)
        }
        idx++;
    }
}
pm.environment.set("save_path_variables", save_path_variables.toString())

eval(pm.environment.get("save_path_variables").replace("var_name", "'project_id'"))()