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course-notes.md

Latest commit, file metadata and controls, introduction to postman course notes, unit 1 - introduction to postman, lesson 1 - welcome, 📚 - resources.

  • 👍 Say THANK YOU for this course by subscribing to my YouTube channel
  • 🏆 Become an EXPERT in Postman & API TESTING, without WASTING TIME

Lesson 2 - What is Postman?

💡 - main ideas.

  • Postman is a tool that allows us to easily work with APIs.
  • Postman is used to build HTTP requests that we send to the server running the API.

Lesson 3 - How to install Postman

  • As a standalone app or
  • Directly in the browser
  • The standalone app is available for Windows, macOS, and Linux.
  • Postman on the web works from any browser but you may need to download the Postman Desktop Agent if your requests fail.
  • DO NOT use the Google Chrome extension as this is deprecated and no longer updated.
  • Download Postman App
  • Open Postman on the web
  • Postman Desktop Agent (scroll down)

Lesson 4 - Your first request with Postman

  • To use an API you need to read the API documentation. We're using Simple Books API whose documentation can be found in the resources section of this lesson below.
  • Work in Postman is organized in Workspaces.
  • A status code 200 (or any status like 2XX) indicates that the request was successful.
  • Simple Books API documentation

Lesson 5 - HTTP

  • The API we are using uses the HTTPS protocol.
  • HTTPS stands for Secure Hypertext Transfer Protocol.
  • HTTPS ensures that the connection is encrypted.
  • All APIs should use HTTPS.
  • From our point of view HTTP and HTTPS are the same.
  • URL (address)
  • Request method (GET, POST, PUT, ...)
  • Headers (User-Agent: Postman)
  • Status code (200, 404, 500, ...)

Lesson 6 - Postman collections and variables

  • You can save requests so that you can re-use them later on.
  • All requests need to be added to a Postman collection.
  • Typically you will have a Postman collection for each API.
  • We are storing the base address of the API in a collection variable called baseUrl .
  • Our saved baseUrl will be displayed as {{baseUrl}} in the address bar.
  • Variables allow us to avoid repeating the same information.
  • Variables allow us to easily make changes.
  • INITIAL VALUE - This will be available to others if you share the collection.
  • CURRENT VALUE - This is private to you and this is the value that Postman uses.

Lesson 7 - Query parameters

  • JSON is the most popular format that APIs use to send data.
  • example : {{baseUrl}}/books?type=fiction
  • The format is key=value
  • example: foo=1&bar=2
  • Depending on the API, some query parameters can be optional or mandatory.
  • A response status 400 indicates an issue with the request data.
  • You can enable and disable parameters by clicking the checkbox associated with each key-value pair.

Lesson 8 - Assignment

  • Study the API documentation and use the limit query parameter in the /books endpoint.
  • Try out different values.
  • Can you make the API return a status code 400?

Lesson 9 - Path variables

  • :bookId is a path variable in the URL.
  • This endpoint allows us to specify a value that changes all the time, depending on the book.
  • :bookId is just a placeholder and does not get sent.
  • You can use path variables in combination with query parameters (if the API accepts this).

Lesson 10 - POST request / API Authentication

  • A POST request allows you to send data in the request body.
  • The endpoint for submitting orders requires authentication.
  • Some APIs/endpoints are public and require no authentication.
  • Other APIs/endpoints are private and require authentication.
  • An access token is temporary password generated by the API.
  • To send JSON, select the POST request method and from the Body select Raw and from the list JSON .

Lesson 11 - JSON format

  • You need to specify valid JSON, otherwise the server won't understand your request.
  • Use double-quotes "" for strings, separate key-value pairs with a comma sign ,
  • Numbers, booleans don't need to be between quotes.
  • Postman will indicate when your JSON is invalid.

Lesson 12 - Assignment

  • Create the POST request to order a book.
  • Try ordering a book that is not in stock.

Lesson 13 - Random test data

  • example: {{$randomFullName}}
  • To inspect the request body you can use the Postman console.
  • Dynamic variables in Postman

Lesson 14 - Is Postman the right tool for me?

  • Postman is a tool for dealing with APIs.
  • Postman cannot work with User Interfaces, click buttons and fill out forms.
  • Postman is not a performance testing tool.
  • Postman can be used for security testing but has not been designed for this purpose.

Lesson 15 - Viewing existing orders

  • Using the GET request method on the orders endpoint will give us a list of orders.
  • Using the POST request method on the same endpoint will let us create a new order.

Lesson 16 - Assignment

  • Look at the API documentation and identify the endpoint that would allow you to see a single order.

Lesson 17 - PATCH request

  • A PATCH request is typically used for updating existing data.
  • A PATCH usually does a partial update, by changing only some of the properties.

Lesson 18 - DELETE request

  • A DELETE request is used for deleting data.
  • If you try to get the same data with a GET request, you will get a 404 Not Found status code.

Unit 2 - Test automation with Postman

Lesson 19 - introduction to test automation.

  • In this second part of the course, our goal is to automate testing of the API.
  • So far, we have done manual testing but we want to write API tests to avoid having to manually re-test the API

Lesson 20 - Your first API tests

  • We are looking at the response to understand if the API is working properly.
  • With API tests we want to avoid manually re-testing the API.
  • Tests in Postman are written in JavaScript.
  • Tests are executed ONLY after the response has arrived from the API.
  • Postman uses an assertion library called Chai.js
  • Testing the response status code is one of the easiest tests you can write.
  • When writing tests, we want to make sure the tests fail.
  • To make the assertions on a JSON response, you first need to parse it.
  • To see the contents of a JavaScript variable you can use console.log()
  • alternative syntax: someobject["someproperty"]
  • Introduction to JavaScript for Postman (full course for FREE)
  • Chai Assertion Library
  • Make Sure Your Tests Fail, Valentin Despa | Postman Galaxy 2021

Lesson 21 - Assignment

  • Add tests for all the requests in the collection that verify the status code.

Lesson 22 - Postman variables

  • Postman variables are fundamental to automating testing of the API.
  • Postman environments (environment variables) are good if you have multiple testing environments (localhost, testing, production)
  • Postman collection variables are saved in the collection.
  • Postman global variables are available to all collection in a workspace.
  • We use Postman global variables as the data we save is not that important after the execution has stopped.
  • Demystifying Postman Variables: HOW and WHEN to use Different Variable Scopes
  • How to set up different URLs in Postman using environment variables

Lesson 23 - Extracting data from the response

  • Having hardcoded values in requests can make the API tests fail if the data changes.
  • We are using the filter function available on all arrays to remove the books that are not available.
  • Always use console.log() to view the data you are trying to set as a variable.
  • Array.prototype.filter()

Lesson 24 - Assignment

  • Test that the book extracted from the response is of type non-fiction
  • Ensure that the test fails.

Lesson 25 - Assignment

  • Use the Postman global variable bookId in the requests "Get single book" and "Order book".
  • use this assertion as a starting point: pm.expect(1).to.be.above(2)

Lesson 26 - Collection runner

  • The Collection runner is a built-in functionality of Postman.
  • The Collection runner allows you to execute the entire collection with just one click.
  • Make sure to check (:white_check_mark:) the "Save response" box as this will allow you to inspect the response body.

Lesson 27 - Request execution order

  • If you run a Postman collection, the default order is as you have it in the collection.
  • You can change that order if you use postman.setNextRequest and specify the name of the next request
  • If you wish to stop the execution prematurely, you can so so by running postman.setNextRequest(null)
  • Advanced workflows (request chaining) with Postman

Lesson 28 - Postman monitors

  • Creating a Postman monitor ensures that you can run a Postman collection according to a pre-defined schedule.
  • Running the collection will be handled by Postman on their infrastructure, you don't need to keep Postman open.
  • If you are not familiar with continuous integration servers like Jenkins, GitLab CI or TeamCity, this is a quick and easy way to access a Postman collection.
  • The API needs to be accessible from any network.

Lesson 29 - Newman

  • Newman is a CLI tool that can take a Postman collection, run all the tests and generate a report at the end.
  • Newman does not have an interface, you need to work with it from the terminal.
  • Often Newman is installed on an integration server like Jenkins, GitLab CI or TeamCity.
  • you can download Node.js from https://nodejs.org/ (download the LTS version)
  • To install newman, run the command: npm install -g newman
  • Check if newman is install with: newman --version
  • Export the collection as a JSON file.
  • Share with a public link.
  • Use the Postman API to get the collection.
  • Postman API
  • Newman Support

Lesson 30 - HTML reports with Newman

  • htmlextra is the most popular reporter in the Postman community
  • htmlextra reporter
  • Postman / Newman: Create better HTML reports

Lesson 31 - CI/CD overview

  • Newman is particularly useful when you integrate it with a CI server.
  • Newman Jenkins Tutorial
  • Newman GitLab CI Tutorial

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Testing REST IPA using POSTMAN

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Postman documentation overview

Welcome to the Postman Learning Center docs! This is the place to find official information on how to use Postman in your API projects.

If you're learning to carry out a specific task or workflow in Postman, check out the following topics to find resources:

  • Get started

To get started using Postman, check out the Get started section.

  • Send requests

You can send requests in Postman to connect to APIs you are working with. To learn more about how to send requests, see Send API requests and get response data in Postman and learn how to send your first request .

  • Write scripts

Postman has a powerful runtime based on Node.js that enables you to add dynamic behavior to requests and collections. You can write scripts that run before or after request execution to perform API tests, build requests that can contain dynamic parameters, pass data between requests, and more. To learn more about scripts, see Use scripts to add logic and tests to Postman requests .

  • Use collections

Postman Collections are groups of saved requests. You can use collections to organize and group your requests. They can then be run together. You can run collections manually, on a schedule, from a CI/CD pipeline, or from a webhook. To learn more about collections, see Organize and automate API requests in Postman Collections .

  • Use Postman Flows

Postman Flows is a visual tool for creating API workflows. You can use Flows to chain requests, handle data, and create real-world workflows in your Postman workspace.

To learn more about Postman Flows, see Build API applications visually using Postman Flows .

  • Use the Postman CLI

The Postman CLI is a secure command-line companion for Postman. You can use the Postman CLI to run a collection, send run results to Postman, check API definitions against configured API Governance and API Security rules, and more.

To learn more about the Postman CLI, see Explore Postman's command-line companion .

  • Collaborate in Postman

Postman provides a variety of tools to enable and enhance collaboration within your team. You can create team workspaces, where team members can share their work and collaborate on API projects. Users can also discuss their work directly in Postman by commenting on collections and APIs, including on specific requests, versions, and inline on API definitions and scripts.

To learn more about collaboration in Postman, see Collaborate in Postman .

  • Design and develop your API

Postman supports API-first development with the API Builder. Use the API Builder to design your API in Postman. Your API definition can then act as the single source of truth for your API project.

You can connect various elements of your API development and testing process to your API definition, such as collections, documentation, tests, and monitors. You can also sync your API in Postman with a Git repository.

To learn more about API-first development, see Design your API in Postman using the API Builder .

  • Document your API

Documentation is an important part of any collection or API. Good documentation helps the people who use your collection understand what it does and how each request works. And comprehensive API documentation lets your consumers know what endpoints are available and how to interact with them.

Once you've generated documentation for your collection or API, users can view the documentation in Postman. By default your documentation is private, so you must share a collection or API with others before they can access it. If you're creating a public API, you can publish your documentation to make it publicly available to anyone with a web browser.

To learn more about documenting your API, see Document your APIs in Postman .

  • Monitor your API

Postman Monitors give you continuous visibility into the health and performance of your APIs. Monitors enable you to run API test scripts, chain together multiple requests, and validate critical API flows. A monitor runs a series of requests from the Postman cloud on a schedule you set. To learn more about using monitors, see Monitor health and performance of your APIs in Postman .

  • API Governance and API Security

API governance is the practice of defining and applying development rules that promote consistent API behaviors across your organization's API landscape. A robust API security posture means that your organization has development rules that promote security-first API behaviors. The Postman API Governance and Postman API Security features can identify inconsistencies or weaknesses in your APIs, then recommend possible fixes or improvements.

To learn more about Postman's API Governance and API Security features, see API Governance and API Security in Postman .

  • Administration

Postman provides a variety of options to customize your team's experience, from the initial setup to ongoing team and plan management. As a Team Admin, you can streamline the onboarding process for your team, manage access control, and keep your team up to date with the latest version of Postman.

To learn more about administering your Postman team, see the Team management overview .

  • Use reports

Postman generates reports that enable you to visualize data for how your team uses Postman. These reports give you insights into the state of your APIs, including tests, documentation, and monitoring coverage. They also enable you to track performance and SLA adherence.

To learn more about how to use reports, see View reports on usage, security, and billing in Postman .

  • Developer resources

If you're integrating Postman with your CI/CD workflow or are developing with Postman APIs or libraries, check out Postman developer resources .

  • Integrations

You can connect Postman to your API workflows with integrations for popular third-party solutions. Use integrations to automatically share data between Postman and the other tools you rely on for API development. For more information, see Integrate Postman with third-party solutions .

Last modified: 2023/10/19

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Public workspaces

Where can I download older versions of Postman?

My team is on 6.7.4, we have chosen not to migrate to the v7.0 framework yet. We have a new member to add to the team, where can the new member download 6.7.4 from?

Hi @Chris_Yeager

The changelog has download links for the current and previous version of Postman for Mac / Windows / Linux. And remember to turn off automatic updates under the Settings.

Since you’re looking for v6.7.4 in particular: https://learning.getpostman.com/docs/postman_pro/managing_postman_pro/migrating_to_v7/#download-latest-postman-v6-app

@jetison it looks like that link now 404s. Is there another place to download v6.7.4?

Sorry about that - we’ll get that link fixed. In the meantime, can you try this - or fiddle with the URL for your preferred version and OS?

https://dl.pstmn.io/download/version/6.7.4/osx64

That worked, thank you.

It would be great to update the links in app. All the links that tell my team to downgrade(which is also a super poor user experience) go to 404 pages. Also the link you provided was just for osx. How do we actually find these download links if even the app returns 404s? Why release v7 if it doesn’t work with teams?

Also, the changelog page doesn’t let you download any version.

All the links still lead to 404 pages.

:pray:

I have the same issue. I need to install v6 and have windows 10. Can’t find the download links.

Hi @miller ,

:wave:

Release notes for the previous version of Postman for Mac / Windows / Linux are available here: https://www.getpostman.com/downloads/release-notes

To download v6 go to this link: https://learning.getpostman.com/docs/postman-pro/managing-pro/migrating-to-v7/#download-latest-postman-v6-app

Hi I need to download Postman 5.5.3 version for Windows OS 64/32 bits.

The release notes on the Postman official website does not have option to download this version.

Please share the link

:slight_smile:

Would you mind sharing why you need to revert to a version from that long ago? You should be able to download it following the instructions from @jetison above but I wouldn’t recommend it since you will be missing plenty of new features including some collaboration ones.

Hi @arlem we need version 5.5.3 for some testing purpose.

The link provided by @jetison is for version 6.7.4 and I need 5.5.3 Windows.

Hi @Ajinkya.Kholkute ,

I was told we’re not supporting versions 5.* and prior anymore, therefore you won’t be able to download it for security reasons. The oldest version you can get is the 6.7 linked above.

Can I get postman 7.24 version download link. 7.29.1 is broken to process requests through proxy.

I couldn’t import Swagger 2.0 in Postman 7.30.1 (latest), I got unable to parse error. I came here and downloaded 7.2.0 using the link https://dl.pstmn.io/download/version/7.2.0/win64 Importing the file there gave me error about missing “info.title” element, I added it to the Swagger json and successfully imported it. The fixed file can also be imported in latest Postman.

So to the Postman team:

  • Don’t require “info.title” as it’s optional.
  • Give better error messages when importing files like in 7.2.0

Can I get 7.36.4 download link for Windows 64. @jetison

https://dl.pstmn.io/download/version/7.36.4/win64

latest 7.x version:

https://dl.pstmn.io/download/version/7.36.5/win64

Not sure what’s going but I seem to have found the correct version, v6.7.4 here: Download [Postman-win64-6.7.4-Setup.exe](PSDC), Windows softwares free 100%

And yet after running the installation, the app says I’m of version 7 and I can update if I wanted to. this is not what I want so I decided to just go ahead and Sign In to my team library. Now, checked version and I’m finally back with v6.7.4…

Thanks, Tien

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How to Use Postman for Testing an API

Mar 10, 2022

20 likes | 29 Views

Postman is a very famous API testing tool/software that can easily test an API in just a matter of seconds. Additionally, the tool/software is very easy to use and has a very user-friendly interface.

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H How to Use Postman for Testing ow to Use Postman for Testing API? Intro Introduction: duction: Postman is a very famous API testing tool/software that can easily test an API in just a matter of seconds. Additionally, the tool/software is very easy to use and has a very user-friendly interface. However, if you are new to using it then you might face little problems while using it. So, to help you out today we are sharing with you a simple step-by-step guide that you can follow to install, configure and use the Postman tool. API? How Can You Download and Instal How Can You Download and Install Postman API Testing Tool on Your System? l Postman API Testing Tool on Your System? Follow these steps to download and install the Postman API Testing tool on your system: 1.Go to the official website of Postman and select the platform/OS on which you want to install the software. 2.Hit “Download” to download the software on your system. 3.Next, hit the Run” option to start installing the API testing software on your system. 4.Now you will see the “Signup” window on your screen. 5.Login to your Postman account if you have one or hit the “Create Free Account” button and follow on-screen instructions to create a new account. 6.Finally, choose the tools (workspace tools) that you want to use and hit the “Save My Preferences” option to complete the installation process. Want to learn about all the features and functions of Postman? Join our Postman Course in Gurgaon today. How to Create a Get Request? How to Create a Get Request? Follow these steps to create a “Get” request on Postman: 1.Tap on the “orange “New” button which is present on the left side of the software. 2.Now tap on the “Request” button. 3.Next, enter a name for your request. 4.Now hit the “Create Collection” button to create a new collection. 5.Next, enter a name for your collection and tap on the orange checkmark button near it. 6.Now hit the “Save” option to save it. 7.Next, change the request type to “GET.” 8.Now enter the URL that you want to test in the request URL field. 9.Tap “Send.” 10.Finally, you will see the “200 OK” message on your screen. This indicates that you have successfully run the test. How to Create a Post Request? How to Create a Post Request? Follow these steps to create a “POST” request: 1.Click on the “+” button to create a new tab for creating a “POST” request. 2.Now change the request type to “POST.” 3.Enter the URL that you want to use/test in the URL field.

4.Now tap on the “Body” tab. 5.Next hit the “Raw” option and then choose the “JSON” option from the drop-down menu. 6.Now enter the following text: {"text": "Hello, I am learning how to test APIs!"}. 7.Finally hit the blue “Send” button and you have successfully created your “POST” request. How to Crea How to Create a Parameterize Request? te a Parameterize Request? Follow these steps to create parameterize request: 1.Change the request type to “GET.” 2.Now enter a URL that you want to use in the URL field. For example, enter the following URL in the URL field: https://jsonplaceholder.typicode.com/users. 3.Next, change the first part of the link with a parameter like {{url}}. 4.Now the new URL will be {{url}}/users. 5.Hit “Send.” 6.Now you will see “Couldn’t get a response” on your screen. This is because of the fact that you haven’t set the source of the parameter yet. 7.Next, you have to set the environment. To do this: Tap on the eye icon which is present on the right side of your screen. 8.Now tap on the “Edit” option to set the variable to a global environment. 9.Next, hit the “Edit” option which is present in the “Globals” section to create a variable. 10.Now give a name to your URL like “URL” and hit “Save.” 11.Next, hit the “Close” button if you see the “Manage Environments” window on your screen. 12.Finally, navigate to your “GET” and hit the “Send” button and you will see the results of your request on your screen. Want to learn to use the Postman tool in-depth? Join our Postman Online Course today. Conclusion Conclusion: : Postman is a magnificent testing tool (API testing tool) that allows an API tester to easily test an API by sending requests to the server and receiving its response. Overall it is a spectacular API testing tool and can be very useful for you if you are an API tester. So, carefully follow all the instructions of this guide and you will become a master in using this phenomenal testing tool in no time. Source URL: https://keyposting.com/how-to-use-postman-for-api-testing/

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