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Test Automation for API Testing: approach and Tools

 API testing is one of the important testing methods wherein SOAP web services and REST APIs are covered that can be sent through MQ, JMS, HTTP and HTTPS. The optimal use of API testing can be done by incorporating test automation. There are many software applications that have the tactical backup of APIs for efficient functioning. Hence, it becomes obvious to test APIs pragmatically and strategically for optimal outcomes. In this article, you will get the specific tools and approaches that can be used for carrying out test automation for API testing.   

What is Application Programming Interface (API) testing? 

It is a testing method through which APIs are validated. The purpose of this testing method is to check the performance, reliability and functionality of the programming interfaces in API testing. Carrying out test automation for API testing is another integral aspect that needs to be taken into consideration as and when required by the team.    


 

The following are the API test automation tools: 

 

1. Postman: It is considered one of the best tools for carrying out test automation for API testing. It has an awesome API development environment that has three parts namely built-in tools, workspaces and collections. The collections part helps in running requests, debugging and testing them, automated tests are being created and API is mocked, documented and monitored.  


 

2. Preflight: It is also one of the topmost no-code test automation API tools. Flexibility is provided by this tool so that tests can be created and run in diverse cross-platform environments such as different operating systems (e.g., macOS, Android, Linux, Windows etc.), cross-browser setups and for applications that are written in different programming languages such as Ruby, Java, Python, JavaScript etc. 


 

3. Testim: The forever learning approach is provided by this tool and it enhances itself with every maintenance activity and test suite execution. API actions are created and standard testing activities are validated. UI testing can be isolated by extracting data from your API and thus efficiently exercise the user interface. 


 

4. Apigee: It is one of the popular cross-cloud API testing tools through which API performance is measured and tested and also the API is supported and built. It provides SOC2, HIPAA, PCI and PII for apps. It provides design flexibility to implement, monitor and extend API. Apigee version 4.19.01 released in 2019 provides more flexibility so that APIs can be managed with features such as virtual host management improvements, self-healing with API-monit, TLS security and Open API 3.0 support.  


 

5. JMeter: This tool is commonly used for functional API testing. API tests can be easily included. The latest version of JMeter is 5.5, wherein new features and enhancements are added such as updated JMeter templates for functional testing, revamped groovy library, visual representation of disabled elements, bug fixes and new themes. This tool is also best suited for carrying out load testing and performance testing. 


 

Following are a few approaches that can be used for carrying out API testing amicably: 

  • The expected outcomes need to be checked  
  • The system needs to be put under strain by using a set of API load tests 
  • Before using an API, ensure how it also fails 
  • The test cases need to be sorted into groups based on the test type 
  • The API function calls should be made a priority so that testers can test them efficiently and quickly  
  • The tests should be isolated as much as possible so that the number of variables that need to be tested will have a certain limit 

  • A call-sequencing procedure should be carried out accordingly. 

 

Conclusion: If you are looking forward to implementing automation testing for your specific project, then do get connected with a devoted software testing services company that will provide you with a methodical testing blueprint that is in line with your project specific requirements.  

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