Functional Testing Definition Type Example and Tools

Functional Testing Definition

Type of Software Testing, Which validates software against functional requirements/specification. In functional testing, we are not concerned about the source code of the application. It mainly involves black box testing means we are testing software based on various appropriate input sets.

What to test in functional testing?

1. Main application functionality.

2. Usability

3. Accessibility

4. Appropriate Error message

How to do Functional testing?

1. Capture requirements

2. Identify test input set

3. Compute the expected output

4. Execute test cases

5. Compare actual and expected output/result.

Functional Vs Non Functional testing

Functional Testing

1. Goal: Meeting Business requirement

2. Done before Non-Functional testing

3. Describe what product do

4. Manual testing is easy

Non-Functional Testing

1. Goal: Improving performance (scalability, speed, etc)

2. Done after functional testing

3. Improve product efficiency

4. Manual testing is tough

Example of Functional testing

1. unit-testing

2. White-box testing

3. Black box testing

4. Integration testing

Functional testing tools

1. Selenium

2. QTP

3. SoapUi

4. Junit