{"id":1169,"date":"2019-10-18T17:22:14","date_gmt":"2019-10-18T17:22:14","guid":{"rendered":"http:\/\/talentedtester.com\/?p=1169"},"modified":"2019-10-21T18:25:29","modified_gmt":"2019-10-21T18:25:29","slug":"why-functional-testing-is-required","status":"publish","type":"post","link":"http:\/\/talentedtester.com\/why-functional-testing-is-required\/","title":{"rendered":"Why Functional Testing is Required (Examples,Types)"},"content":{"rendered":"

If you are preparing for your ISTQB (Click here for my prep guide<\/a>), you may need to understand the nature of functional testing, and how it works. Let me explain…<\/p>\n

Why is functional testing required? It verifies that the agreed behavior of each function works as specified in the related requirements. It is an important part of software testing and is covered throughout all levels during the software development lifecycle.<\/strong><\/p>\n

Now that you understand what functional testing is, at a high level. Let me now explain how it is measured, what skills are required, the different types and much more. Keep reading…<\/p>\n\n

What is functional testing?<\/h2>\n

Functional testing is a Test type that focuses on the functions that a system has been designed to do. It can be used at all test levels and uses techniques such as Black-box testing (more on this later) to derive its tests.<\/p>\n

The test cases that form this are based on functional requirements. These functional requirements can be across varying different levels and stages. For example, functional specifications, user stories, etc.<\/p>\n

How can functional testing be measured?<\/h2>\n
\"how

how to measure functional testing<\/p><\/div>\n

You may be wondering if these functional tests can cover such a broad amount of levels, how can the actual coverage be measured? In reality, this is done quite easily, assuming you have a documented test basis to work with, e.g. functional specification. Let me explain\u2026<\/p>\n

The coverage is measured based on the functions documented against the number of test cases created. This can be done in the form of a traceability matrix at a high level. These gaps that are defined (if found) can help to tighten up the test coverage.<\/p>\n

What skills are typically required?<\/h2>\n

In this section, I will discuss what skills are usually required when designing or executing functional tests. As you can imagine, depending on your specific requirements, it can be quite a technical process.<\/p>\n

As I stated it is a technical process and for that reason, it requires skills or experience with the system or business process. This isn\u2019t a deal-breaker if the individual resource does not have this, but in the absence of this, there will be a steep learning curve until it is mastered.<\/p>\n

What types of Functional testing is there?<\/h2>\n

As you can imagine there are various different types of functional tests, as I mentioned earlier this testing is conducted at multiple levels. For that reason, I will break down some of these types to help you understand.<\/p>\n

The following is a list of functional test types:<\/p>\n