Functional testing is a quality assurance process that is used to verify that the components of software work correctly. It focuses on the application interface ensuring the software works according to the business requirements. It is a type of black box testing.
Types of functional testing includes:
- Unit Testing
- Smoke Testing
- Sanity Testing
- Integration Testing
- System Testing
- Regression Testing
- User Acceptance Testing
When should you perform functional testing?
Functional testing should be included as essential element for each testing approach.
Ensuring the correct functioning of any component of the software is very crucial. Hence, functional testing should start early in development phase. Continuing the functional testing throughout the development cycle and into the production also is must. In a real-time scenario, developers develop a small component of the software first, then integrate it. Testers should also follow the same approach. He/She should start functional testing of the components first to ensure that independently components are working correctly and then after integration with the whole system, more rigorous test cases must be performed to ensure the integrity of the application.
Execution of functional tests
Functional tests can be performed manually or by using automation testing tools. Manual execution of functional tests is the straightforward method of performing functional testing since it complementarily allows to test the system in the same way a customer would use it. But the main challenge of doing functional testing manually is that it can be time-expensive.
Functional tests can also be executed by automating them. Selenium, Watir, WorkSoft and other similar tools are used to perform regression and functional tests. Sometimes test automation suites can be fragile or miss issues that a human tester would spot easily. Thus, automating fully the functional tests is not a good option to prefer. Also setting up test automation suites will take more time and they must be maintained continually. Maintenance is problematic in case of features under development.
Stepping of AI-based Rainforest QA in functional testing
By providing crowdsourced functional testing on-demand, Rainforest QA enables QA teams to execute and get results of functional tests quickly with nominal resources in comparison with manual functional testing. QA developers would need to write functional tests once in the Rainforest environment, then execute them multiple times as needed across browsers. Rainforest also allows concurrent execution of tests. Rainforest tests are executed by human testers and hence are less fragile. Feature verification along with subjective feedback is provided by Rainforest.