In this blog, let’s look at how to perform End-to-End API testing using Rest Assured and Playwright. If you are a beginner at API integration testing, this blog will help you understand the concept. Before we begin with Rest Assured and Playwright to test APIs, let us throw some light on how API integration plays a major role in healthcare domain.

API integration is a term that refers to connecting different software or applications through respective APIs, enabling them to communicate and share data seamlessly. API integration is a cost-effective enhancement.

API integration plays a major role in the healthcare domain. APIs as part of EHR (Electronic Health Records) systems can make it easier for patients to collect and share their health data. This reduces manual work, prevents data loss, and opens a new revenue stream for clinics.

To track daily health-related data, we have health tracking APIs used to track user’s vitals health data, and goal tracking and widely integrated into various wearable devices like smartwatches for real-time tracking and informative reports. For example, API can track things like step count, pulse rate etc. Regular testing is crucial to ensure API integrations are functioning correctly.

Automated API testing ensures that integration testing is done at a regular interval. API automation testing enables minimized repetition and focus on important tasks. For automating APIs at regular intervals, we use Rest Assured Library and Playwright to automate the testing process of API integration.

Rest Assured

An open-source library that helps to automate Rest API. Rest Assured follows the BDD style of writing tests, and one can read the tests very comfortably like what’s going on inside and how the tests will proceed.

Rest Assured is used in sending HTTP requests, including POST, GET, PUT, DELETE, OPTION, PATCH, and HEAD, and their response is used for validation. A few of the key features are mentioned below.

• It removes the need for writing a lot of complex code required to set up an HTTP connection, send a request and receive, and parse a response.
• Supports multi-part form data and various authentication mechanisms.
• Supports data-driven testing.
• Support logging mechanisms for both request and response details.
• It follows the BDD approach and uses keywords like given (), when (), and then (), which make the code readable and support clean coding.
• Methods for the quick validation of status code, response time, etc.

Flowchart for Rest Assured

Scenarios Automated via Rest Assured in Healthcare Domain

• Enroll a new Patient using the POST HTTP and “Enroll Patient” API. Assert the response status code and status line of ” Enroll Patient.”
• Retrieve details of any specific Patient by sending the Patient ID in the GET “Retrieve Patient record” API. Validate the response parameters (status, message), status code, and status line.
• Update details of any specific Patient using the PUT HTTP method and “Update Patient ” API. Validate response parameters (status, message), status code, and status line.
• Delete Patient using the DELETE HTTP method and “Delete Patient ” API. Validate the status code and status line and check patient is not available in the database anymore.

Given () is a BDD-syntax that contains the request specification.
When (): when method contains the action, that is going to be performed.
Then (): Validation of the sent request, is taken care by then keyword of BDD.
JsonPath : JsonPath is a class in Rest Assured that is used to retrieve the response body.


API Automation using Playwright

Playwright is the latest framework in the software industry. Loaded with advanced features providing the ability to not only automate your UI, but it can also help you automate the APIs. Playwright added support for API testing, making a good solution for E2E testing. We recognize Playwright to be suitable for the healthcare domain. AI (Artificial Intelligence) is also supported by Playwright. A few key features are mentioned below.

• Bugs while regression can be easily recognized on executing API testing.
• Blazing fast execution of tests in parallel, enormously time efficient.
• API integrations with applications can be tested at regular intervals.
• API coverage for complex test cases can be validated.

Playwright is a tool for automating web applications and can also be used for validating API. Playwright provides an easy-to-use API that allows you to make requests, perform validations, and parse responses.

Conclusion

API integration plays an important role in simplifying complex business processes. By integrating different APIs, businesses can automate workflows and reduce the need for manual data entry, which can be time-consuming. So, to test these API integrations on a regular basis API automation is the best way to reduce effort manually. Rest Assured library and API Automation with playwright provide the solution to test API integrations regularly.