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newman

Command-line companion utility for Postman


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newman the cli companion for postman

Using Newman, one can effortlessly run and test a Postman Collections directly from the command-line. It is built with extensibility in mind so that you can easily integrate it into your continuous integration servers and build systems.

Newman has been recently upgraded to v3.x. Although most options from v2.x work as expected, some of them have been deprecated and are scheduled to be discontinued soon. We strongly advise you to migrate to the new v3.x CLI options by referring to our Newman v2 to v3 Migration Guide

For Newman v2.x release documentation, see the Newman v2.x README.


  1. Getting Started

    1. Using Newman as a NodeJS module
  2. Command line options

    1. newman-run
      1. Configuring reporters
        1. CLI reporter options
        2. JSON reporter options
        3. HTML reporter options
        4. JUnit reporter options
  3. API Reference

    1. newman run
    2. Run summary object
    3. Events emitted during a collection run
  4. Using Newman with the Postman Cloud API

  5. Communinty Support

  6. License


To run Newman, ensure that you have NodeJS >= v4. A copy of the NodeJS installable can be downloaded from https://nodejs.org/en/download/package-manager.

The easiest way to install Newman is using NPM. If you have NodeJS installed, it is most likely that you have NPM installed as well.

$ npm install newman --global;

The newman run command allows you to specify a collection to be run. You can easily export your Postman Collection as a json file from the Postman App and run it using Newman.

$ newman run examples/sample-collection.json;

If your collection file is available as an URL (such as from our Cloud API service), Newman can fetch your file and run it as well.

$ newman run https://www.getpostman.com/collections/631643-f695cab7-6878-eb55-7943-ad88e1ccfd65-JsLv;

For the complete list of options, refer the Commandline Options section below.

Newman can be easily used within your JavaScript projects as a NodeJS module. The entire set of Newman CLI functionality is available for programmatic use as well. The following example runs a collection by reading a JSON collection file stored on disk.

var newman = require('newman'); // require newman in your project 
 
// call newman.run to pass `options` object and wait for callback 
newman.run({
    collection: require('./sample-collection.json'),
    reporters: 'cli'
}, function (err) {
    if (err) { throw err; }
    console.log('collection run complete!');
});

Note: The newman v2.x .execute function has been discontinued.


  • -e <source>, --environment <source>
    Specify an environment file path or URL. Environments provide a set of variables that one can use within collections. Read More

  • -g <source>, --globals <source>
    Specify file path or URL for global variables. Global variables are similar to environment variables but has a lower precedence and can be overridden by environment variables having same name.

  • -d <source>, --iteration-data <source>
    Specify a data source file (CSV) to be used for iteration as a path to a file or as a URL. Read More

  • -n <number, --iteration-count <number>
    Specifies the number of times the collection has to be run when used in conjunction with iteration data file.

  • --folder <name>
    Run requests within a particular folder in a collection.

  • --export-environment <path>
    The path to the file where Newman will output the final environment variables file before completing a run.

  • --export-globals <path>
    The path to the file where Newman will output the final global variables file before completing a run.

  • --export-collection <path>
    The path to the file where Newman will output the final collection file before completing a run.

  • --timeout-request <ms>
    Specify the time (in milliseconds) to wait for requests to return a response.

  • -k, --insecure
    Disables SSL verification checks and allows self-signed SSL certificates.

  • --ignore-redirects
    Prevents newman from automatically following 3XX redirect responses.

  • --delay-request
    Specify the extent of delay between requests (milliseconds).

  • --bail
    Specify whether or not to stop a collection run on encountering the first error.

  • -x, --suppress-exit-code
    Specify whether or not to override the default exit code for the current run.

  • --no-color
    Newman attempts to automatically turn off color output to terminals when it detects the lack of color support. With this property, one can forcibly turn off the usage of color in terminal output for reporters and other parts of Newman that output to console.

Reporters provide information about the current collection run in a format that is easy to both: disseminate and assimilate.

  • -r <reporter-name>, --reporters <reporter-name>
    Specify one reporter name as string or provide more than one reporter name as a comma separated list of reporter names. Available reporters are: cli, json, html and junit.

  • --reporter-{{reporter-name}}-{{reporter-option}}
    When multiple reporters are provided, if one needs to specifically override or provide an option to one reporter, this is achieved by prefixing the option with --reporter-{{reporter-name}}-.

    For example, ... --reporters cli,html --reporter-cli-silent would silence the CLI reporter only.

  • --reporter-{{reporter-options}}
    If more than one reporter accepts the same option name, they can be provided using the common reporter option syntax. <br /
    For example, ... --reporters cli,html --reporter-silent passes the silent: true option to both HTML and CLI reporter.

Note: Sample collection reports have been provided in examples/reports.

These options are supported by the CLI reporter, use them with appropriate argument switch prefix. For example, the option no-summary can be passed as --reporter-no-summary or --reporter-cli-no-summary.

CLI reporter is enabled by default, you do not need to specifically provide the same as part of --reporters option. However, enabling one or more of the other reporters will result in no CLI output. Explicitly enable the CLI option in such a scenario.

CLI Option Description
--reporter-cli-silent The CLI reporter is internally disabled and you see no output to terminal.
--reporter-cli-no-summary The statistical summary table is not shown.
--reporter-cli-no-failures This prevents the run failures from being separately printed.
--reporter-cli-no-assertions This turns off the request-wise output as they happen.
--reporter-cli-no-console This turns off the output of console.log (and other console calls) from collection's scripts.

The built-in JSON reporter is useful in producing a comprehensive output of the run summary. It takes the path to the file where to write the file. The content of this file is exactly same as the summary parameter sent to the callback when Newman is used as a library.

To enable JSON reporter, provide --reporters json as a CLI option.

CLI Option Description
--reporter-json-export <path> Specify a path where the output JSON file will be written to disk. If not specified, the file will be written to newman/ in the current working directory.

The built-in HTML reporter produces and HTML output file outlining the summary and report of the Newman run. To enable the HTML reporter, provide --reporters html as a CLI option.

CLI Option Description
--reporter-html-export <path> Specify a path where the output HTML file will be written to disk. If not specified, the file will be written to newman/ in the current working directory.
--reporter-html-template <path> Specify a path to the custom template which will be used to render the HTML report. This option depends on --reporter html and --reporter-html-export being present in the run command. If this option is not specified, the default template is used

Custom templates (currently handlebars only) can be passed to the HTML reporter via --reporter-html-template <path> with --reporters html and --reporter-html-export. The default template is used in all other cases.

Newman can output a summary of the collection run to a JUnit compatible XML file. To enable the JUNIT reporter, provide --reporters junit as a CLI option.

CLI Option Description
--reporter-junit-export <path> Specify a path where the output XML file will be written to disk. If not specified, the file will be written to newman/ in the current working directory.

Older command line options are supported, but are deprecated in favour of the newer v3 options and will soon be discontinued. For documentation on the older command options, refer to README.md for Newman v2.X.

  • -h, --help
    Show commandline help, including a list of options, and sample use cases.

  • --version
    Displays the current Newman version, taken from package.json


The run function executes a collection and returns the run result to a callback function provided as parameter. The return of the newman.run function is a run instance, which emits run events that can be listened to.

Parameter Description
options This is a required argument and it contains all information pertaining to running a collection.

Required
Type: object
options.collection The collection is a required property of the options argument. It accepts an object representation of a Postman Collection which should resemble the schema mentioned at https://schema.getpostman.com/. The value of this property could also be an instance of Collection Object from the Postman Collection SDK.

As string, one can provide a URL where the Collection JSON can be found (e.g. Postman Cloud API service) or path to a local JSON file.

Required
Type: object|string|PostmanCollection
options.environment One can optionally pass an environment file path or URL as string to this property and that will be used to read Postman Environment Variables from. This property also accepts environment variables as an object. Environment files exported from Postman App can be directly used here.

Optional
Type: object|string
options.globals Postman Global Variables can be optionally passed on to a collection run in form of path to a file or URL. It also accepts variables as an object.

Optional
Type: object|string
options.iterationCount Specify the number of iterations to run on the collection. This is usually accompanied by providing a data file reference as options.iterationData.

Optional
Type: number, Default value: 1
options.iterationData Path to the JSON or CSV file or URL to be used as data source when running multiple iterations on a collection.

Optional
Type: string
options.folder The name or ID of the folder (ItemGroup) in the collection which would be run instead of the entire collection.

Optional
Type: string
options.timeoutRequest Specify the time (in milliseconds) to wait for requests to return a response.

Optional
Type: number, Default value: Infinity
options.delayRequest Specify the time (in milliseconds) to wait for between subsequent requests.

Optional
Type: number, Default value: 0
options.ignoreRedirects This specifies whether newman would automatically follow 3xx responses from servers.

Optional
Type: boolean, Default value: false
options.insecure Disables SSL verification checks and allows self-signed SSL certificates.

Optional
Type: boolean, Default value: false
options.bail A boolean switch to specify whether or not to gracefully stop a collection run on encountering the first error. Takes no arguments.

Optional
Type: boolean, Default value: false
options.suppressExitCode If present, allows overriding the default exit code from the current collection run, useful for bypassing collection result failures. Takes no arguments.

Optional
Type: boolean, Default value: false
options.reporters Specify one reporter name as string or provide more than one reporter name as an array.

Available reporters: cli, html and junit.

Optional
Type: string|array
options.noColor Newman attempts to automatically turn off color output to terminals when it detects the lack of color support. With this property, one can forcibly turn off the usage of color in terminal output for reporters and other parts of Newman that output to console.

Optional
Type: boolean
callback Upon completion of the run, this callback is executed with the error, summary argument.

Required
Type: function

The callback parameter of the newman.run function receives two arguments: (1) error and (2) summary

Argument Description
error In case newman faces an error during the run, the error is passed on to this argument of callback. By default, only fatal errors, such as the ones caused by any fault inside Newman is passed on to this argument. However, setting abortOnError:true or abortOnFailure:true as part of run options will cause newman to treat collection script syntax errors and test failures as fatal errors and be passed down here while stopping the run abruptly at that point.

Type: object
summary The run summary will contain information pertaining to the run.

Type: object
summary.error An error object which if exists, contains an error message describing the message

Type: object
summary.collection This object contains information about the collection being run, it's requests, and their associated pre-request scripts and tests.

Type: object
summary.environment An object with environment variables used for the current run, and the usage status for each of those variables.

Type: object
summary.globals This object holds details about the globals used within the collection run namespace.

Type: object
summary.run A cumulative run summary object that provides information on .

Type: object
summary.run.stats An object which provides details about the total, failed, and pending counts for pre request scripts, tests, assertions, requests, and more.

Type: object
summary.run.failures An array of failure objects, with each element holding details, including the assertion that failed, and the request.

Type: array.<object>
summary.run.executions This object contains information about each request, along with it's associated activities within the scope of the current collection run.

Type: array.<object>

Newman triggers a whole bunch of events during the run.

newman.run({
    collection: require('./sample-collection.json')
}).on('start', function (err, args) { // on start of run, log to console 
    console.log('running a collection...');
}).on('done', function (err, summary) {
    if (err || summary.error) {
        console.error('collection run encountered an error.');
    }
    else {
        console.log('collection run completed.');
    }
});

All events receive two arguments (1) error and (2) args. The list below describes the properties of the second argument object.

Event Description
start The start of a collection run
beforeIteration Before an iteration commences
beforeItem Before an item execution begins (the set of prerequest->request->test)
beforePrerequest Before prerequest script is execution starts
prerequest After prerequest script execution completes
beforeRequest Before an HTTP request is sent
request After response of the request is received
beforeTest Before test script is execution starts
test After test script execution completes
beforeScript Before any script (of type test or prerequest) is executed
script After any script (of type test or prerequest) is executed
item When an item (the whole set of prerequest->request->test) completes
iteration After an iteration completes
assertion This event is triggered for every test assertion done within test scripts
console Every time a console function is called from within any script, this event is propagated
exception When any asynchronous error happen in scripts this event is triggered
beforeDone An event that is triggered prior to the completion of the run
done This event is emitted when a collection run has completed, with or without errors

1 Generate an API key
2 Fetch a list of your collections from: https://api.getpostman.com/collections?apikey=$apiKey
3 Get the collection link via it's uid: https://api.getpostman.com/collections/$uid?apikey=$apiKey
4 Obtain the environment URI from: https://api.getpostman.com/environments?apikey=$apiKey
5 Using the collection and environment URIs acquired in steps 3 and 4, run the collection as follows:

newman run <collectionUri> --environment <environmentUri>

If you are interested in talking to the team and other Newman users, we are there on Slack. Feel free to drop by and say hello. Our upcoming features and beta releases are discussed here along with world peace.

Get your invitation for Postman Slack Community from: https://www.getpostman.com/slack-invite.
Already member? Sign in at https://postmancommunity.slack.com


This software is licensed under Apache-2.0. Copyright Postdot Technologies, Inc. See the LICENSE.md file for more information.