Functional testing verifies that each function of the app is working according to previously defined user requirements and specification.This is the most common and popular type of testing that is a must in any type of project. It`s ran based on either specification or use cases and can be done on any level from component to acceptance.
WHAT DO YOU TEST IN FUNCTIONAL TESTING
Since the main point of functional testing is to check each function`s work, here`s what mainly be tested:1.Main-flow functions. There are the functions your app is build around. Those are crucial and usually have highest priorities since they are used by customers on daily basis. For example, in email client it will be composing, sending, receiving and opening emails.2.Usability. No matter how innovative and useful your app is, if its too complex or extremely unfriendly users will search for a simple and more intuitive alternative. That is why you need run at least basic usability tests to check if uses can easily navigate through the app, use its features and have as less questions as possible.3.Accessibility testing. If you need as much people to be able to use your app, you'll have to pay attention here. While designing an app, address needs of people with different disabilities, balance them and use optimal techniques. Also keep in mind law side of the question: some countries have legislatively regulated accessibility requirements.4.Error conditions. Letting user know there was an error or they made a mistake is also extremely important. Make sure you error messages are easy to see, clear and useful.
Functional testing is a large and complex type of testing that can be divided by different sub-types. Your testing process may include all of them or some parts, depending on your needs and project specifics.
FUNCTIONAL TESTING TYPES
In order to do a proper functional testing QA engineer needs to fully understand the process and build it around the following scheme:1. Select features that need to be tested and order in which they should be tests.2. Define test input (test data)3. Compute the expected output with selected test data4. Create test documentation5. Execute text cases and log results6. Compare actual and expected results of executed tests
Functional testing is a large, complex yet must have part of software development. It is commonly used everywhere and not using it means that all other steps of development cycle were done for nothing, since there is no proof everything works as it should. But if this motivation is not enough, there are lots of other advantages you get.
FUNCTIONAL TESTING ADVANTAGES
• Functional stability. If you adopt functional testing in your development lifecycle you'll always be sure your app`s basic features are stable.
• Accuracy. There will be no difference between the spec and your live working app.
• Test coverage. If you use manual testing for functional tests, you`ll be able to cover 100% of the app with them.
• Business requirements are also used as part of the specification for functional tests.
• You can use both automation or manual tests to perform functional testing depending on your needs and your project specifics.
Of course, to build a seamless functional testing process you need experienced professionals that are capable of doing so. Here is when DeviQA`s functional testing services come in handy. We have years of experience in all aspects in functional testing, thousands of tests cases written and executed, 100% test coverage in each feature we test and lots of satisfied clients that rely on us.