How To Automate And Scale Your Rest Api Tests

The Web API functional testing framework depends on the integration testing framework and reuses most of classes implemented there. This course is perfect for manual testers and software engineers who are looking to learn automation testing. Even if you don’t have any programming background or experience in API testing, you can get started with this course. RestSharp is a C# based library that is used to test RESTful Web Services. This library behaves like a headless Client to access REST web services. We can create highly customizable HTTP Requests to send to the Restful server.

The issues appears when you are running all of them in parallel. JMeter is using a lot of memory and CPU if our APIs return a lot of data and it has to process it. No coding required – Its tests are defined in basic YAML or JSON config files. If you are looking for a continuous testing platform for Agile and DevOps, Tricentis Tosca has got you covered.

You may need to download version 2.0 now from the Chrome Web Store. Being originally a Chrome browser plugin, Postman now extends their solution with the native version for both Mac and Windows. Get the latest articles on all things data delivered straight to your inbox.


But If you want to go faster and much easier tool, you can go with Runscope. But If you have very limited time and if you need to give a decision quickly, you can go on with RunScope. First, it is very reasonable to use a framework/library which provides us to test an API easily in a short period of time and we chose the Rest-assured library. SetContentType() – Pass the “application/json”, “application/xml” or “text/html” etc. headers to setContenType() method.

A graphical user interface gives immense power to interact and inspect each result of every test step, without adding log statements and rerunning the tests. As before, you can inspect the result of each step inside the beforeEach block by clicking on the step and drilling down the objects dumped into the DevTools console. The many steps in the reset function are creating a little bit too much noise in the reporter. We can group these commands into a single custom command, if we wanted to, but even simpler is to just pass log option to each command selectively. We can pass to the utility functions called from the reset callback, which will silence requests (but not .its() unfortunately). Let us make the code less brittle by moving the domain part of the url into the cypress.json file.

Do not underestimate the power of coming back to each individual test to inspect a response, for example, to see what data the server has returned, and what the headers were. Automating your API tests will save you time and increase the functionality, reliability, and security of your application. Your team should always be able to run manual tests, to validate if the automated tests are still working, as they are supposed to. As always, you need to find the mix that fits your use case best.

rest api testing framework

QA engineers perform automated API testing using a testing tool that drives the API. We will discuss the most popular solutions in the next section. Certain defects can only be caught by GUI tests and it’s the only test type that truly tests the user experience. So, we encourage you to pay attention to API testing as well and apply it to smooth the overall development workflow. The solution here is to start testing at the early stages.

I did not do this before but when I googled it, I found below articles. You can find a lot of results when you search “api test with cucumber” on google. We will verify the status and print the clients which we get from the API. Sign up for a Free Trial to build visual, interactive experiences. Software development has shifted away from the monolithic architecture to a “micro” service / function approach. Linux Develop applications on the most popular Linux for the enterprise—all while using the latest technologies.

5xx status code error messages result in errors at the server level. While it is never good to see errors, these are especially important to remedy as quickly as possible, as they indicate serious problems and will greatly impact user satisfaction. Welcome to thisCerberus Testingstep-by-step tutorial for testingREST APIs. This guide will help you understand the test automation workflow and good practices supported by the Cerberus Testing open source framework.

How To Automate And Scale Your Rest Api Tests

To work with the curl command in the command prompt, you have to download the latest curl and include the folder that has the curl.exe file. Get full access to the world’s first cloud-based, open source friendly testing community. Enjoy TestProject’s end-to-end test automation Platform, Forum, Blog and Docs – All for FREE. In the latest version, “Fiddler Everywhere v2.0.0” updated in June 2021, the workflows have been improved to enhance user experience. Starting from this version, the Rule Builder can be redesigned and more powerful with Auto Responder. Fiddler’s API Composer makes it easy to quickly test, group, and organize your API requests.

Both JMeter and REST Assured have their advantages over each other. But based on the project that you are working on, one will be a better fit than the other for your REST API test automation. Both are very robust, have useful testing options, boast nice reporting capabilities, and can easily be integrated api testing best practices with custom testing frameworks. JMeter is well known as a performance test tool for testing web apps and services. Out of the box, it has nice reporting options with different chart types that you can use to show the performance test metrics. Installing REST Assured is a bit of a different experience.

You can do so by following the same flow that a JavaScript based client would use. First, make a GET request in order to obtain a CSRF token, then present that token in the following request. This exposes exactly the same interface as if you were using a requests session directly. You are expecting to interface with the API primarily from another Python service, and want to test the service at the same level as the client will see. This can be a useful shortcut if you’re testing the API but don’t want to have to construct valid authentication credentials in order to make test requests. This means that setting attributes directly on the request object may not always have the effect you expect.

Step 3

In reality, API testing tends to bemore complex than the simple case of this tutorial. In this step, we will detail the variousactions and controls that should be performed during the tests. This section describes theinitial setupand integration to enable the API test automation. Perl-based applications can be installed on Microsoft Windows, GNU/Linux, BSD, Solaris, and Mac OS.

  • In the modern development world, many web applications are designed based on a three-tier architecture model.
  • It uses a web-based interface that allows several testers to execute tests on an application.
  • But how do an application remain fully functional, as it’s designed to every time, without compromising on user privacy?
  • For appending, the query parameter goes to the end of the URL by adding ‘?
  • MORE POSTS BY THIS AUTHOR Pushkar Deshpande Full-stack Development Pushkar is a Lead QA at Velotio.

Mocking – By mocking the server response, it has the ability to test edge cases. Similarly, other HTTP methods can also be tested, like OPTIONS – supertest.options() which allows dealing with CORS, PATCH – supertest.patch(), HEAD – supertest.head() and many more. And test coverage details are created under coverage/my_reports/ in the workspace. Creating a node project jest-supertest in our local and doing npm init.

Taking security testing a step further, in penetration testing, certain API functions, resources, processes, or the entire API is under attack from the outside. Usually, API testing is performed on APIs produced by the in-house development team. We don’t test third-party APIs, but we can test the way our software accepts their requests.

JUnit is a testing framework for Java programming language and it is very important in the development of test driven development. Another pro for jMeter is the “modularization.” You could create jMeter test fragments and reuse them in other suites using “Include module” controller. Using this style of creating your test framework you could parameterize every test case and you could run which test case you want, not all the tests at a time. Launched initially as Chrome plugin, Postman has evolved to become a top-tier API testing tool.

If you are starting an automation project and you are new in this type of testing this is the easiest framework to use. You could write native Java code into a lot of it’s samplers. Having the possibility to write Java code gives you many opportunities to better handling exceptions or assertions. When I started to work on my current project the automation framework used for API testing was jMeter. API testing frameworks are necessary for any company with an API strategy.

Checking The Response Data

The main advantage of Katalon studio is its capability to combine UI and business levels (Web services/API) for different operating systems such as Windows, Linux, and Mac OS. According toGoogle Trends, the interest in API testing has been growing steadily. Request — provides more information about the client to the server.

I also feel the best way to demystify something is to break it down into simple, hands-on examples — which is the approach I will take in this book. Now, let’s take a look at calling a simple SOAP Web Service provided by This gave them an idea to create what they call API functional testing.

rest api testing framework

For certain Agile practices like continuous builds, when new code is checked in, the amount of time it takes to receive feedback from a GUI regression suite of tests is unacceptable. It is widely used to test JSON and XML based web applications. Furthermore, it fully supports all methods including the GET, PUT, POST, PATCH, and DELETE. 4xx status code error messages typically occur when something happens at the client/browser level.

What Is Headless Testing

For example, setting .token directly will have no effect, and setting .user directly will only work if session authentication is being used. To support a wider set of request formats, or change the default format, see the configuration section. On our project we are using jMeter for some REST API backend tests. But when the number of jMeter scripts had reached into the hundreds we started to face those possible issues listed above. We have five jMeter scripts with 100 test cases (min. 100 HTTP requests) with at least two assertions. We have to run these scripts on five different test environments.

Test Scenario: Status Code Weekly

This offering is to improve API testing security practices. Version 4.0.0 required at least Java 8, offered support for Apache Johnzon, and fixed many issues with the initial OSGi support. The latest version 4.4.0 is released with various improvements and bug fixes. It has broad language support (Python, JavaScript,etc.), so no need to learn a proprietary language. The tool comes with out-of-the-box plugins for popular CI servers.

Why You Should Prefer Next Js 12 Over Other React Setup

The Requests library saves time and effort by fully automating keep-alive and HTTP connection pooling. No need to manually add query strings to URLs and form-encode POST data. Igor Pavlenko considers Requests a powerful library with easy-to-understand documentation, simple syntax, and rich functionality. Configure your DB connection and install settings in dev/tests/api-functional/config/install-config-mysql.php. The base URL to access this Magento instance must be the same specified in the phpunit_rest.xml or phpunit_soap.xml file. Next, you’ll optimize scripts to match framework standards and closely study the grant type authorization flow with an interesting example.

Show Me Some Code

As it happens, APIs are consumed directly but they can also beembedded into complete applications. A Step is a collection of Actions and Controls for the main stages of your test. With a gooddesign of those elements, you will be able toreuse them across tests to improve your test maintainability. On this first page, be careful to select the Application type“SRV” to explicitly state that your application is an API. First, we need to create the Application to link to the API library and test cases.

REST Assured is a Java library for creating a REST API testing tool script. So, to get started with it, you’ll have to set up a new Java project first, and then include it as a library for your project. REST Assured is the best fit for functional testing of REST API services and it requires strong coding skills to create tests. Load testing is a crucial part of any software application or REST API development process.

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