Difference between functional and non-functional testing

Strategy for software application testing is the essential procedure and it is important part of software development lifecycle. Businesses that neglect to implement quality assurance procedures and software testing techniques will surely loose the trust of customers and sabotage the overall project incurring huge loss. Here in this article you will understand the difference between functional and non-functional testing services.

The software-testing plan is the part of any project documentation. Targets, goals, and requirements of any software application are scoped and bounded by the project plan. Software testing documents are prepared to create test conditions to qualify the application form for efficient usage, platform stability, system stability, performance, and usability.

What is Non-Functional testing services and Functional testing services?
Functional testing is performed making use of various useful features suggested by your client or say by using the design requirements such as use cases created by your own design team.
Here software tester has to test the application to see that all requirements of the client that has been mentioned in BRS and SRS are incorporated.
Non Functional Testing Services takes care of customer expectations such as load, performance, as well as stress issues.

What is the difference between functional and Non Functional testing services?

  • Functional Testing
    Functional tests evaluate top features of any software program that are essential for software to work. In this type of testing each of functionalities that are demanded by your client are tested. When the software fails to meet these practical requirements it gets rejected by your client. And eventually all your resources, time, efforts and money is wasted. Within functional tests, there are two main types of testing which are white box testing and Box Testing.
  • Functional Testing addresses following aspects
    ○ Unit Testing
    ○ Sanity testing and Smoke testing
    ○ Integration tests (Bottom up and Top Down Testing)
    ○ Usability and Interface Testing
    ○ System Tests
    ○ Regression Tests
    ○ User Approval Testing(Alpha and Beta)
    ○ Black box and White box Testing
    ○ Localization and Globalization Testing
  • Top features of functional testing
    ○ You will understand how well your software performs.
    ○ Functional Testing is dependent on client requirements.
    ○ Functional tests means testing your software application against all business requirements.
    ○ It is actually an integral part of System Testing.
    ○ Functional testing validates behavior of your software product.
    ○ These Tests include Integration Testing, Unit Testing, Sanity testing, Smoke Tests, Regression Tests and much more.
  • Functions to be tested:
    In functional testing different functionalities of software are tested. In this testing, basic features are stated by the end user.
  • Response time
    Functional tests are generally carried out before the non-functional testing. It is normally executed by the QA group.
    Functional testing verifies that the implemented product meets all the requirements. This type of testing has four stages — integration, unit, acceptance, and system testing. These can be black or white box testing. It also includes different types of tests such as sanity, regression, and smoke testing.
    In functional testing coding is validated against user’s Requirement. In simple terms functional testing means finding mistakes that does not allow system to function normally. Functional testing validates the requirements, software specifications, objective, guidelines, algorithms, etc.
    Functional testing is involved in all phases and addresses how well your software application executes its different features. This includes data management, queries, user displays, business procedures, and integrations.
  • Non Functional Testing services
    Non-functional requirements are related with how your software behaves and performs. It is really hard to get all non-functional requirements from end users because they are also unaware these non-functional requirements. Non-functional tests include testing of inserts, dependability, performance, usability, and scalability tests. Diverse metrics have already been defined to gauge the behaviours of software program.
  • Non-Functional testing services Includes
    ○ Load and Performance Testing
    ○ Ergonomic Testing
    ○ Volume and Stress Testing
    ○ Migration and Compatibility Tests
    ○ Data Conversion Tests
    ○ Penetration and Security Testing (Network Security, Application Security, and System Security)
    ○ Operational Readiness Testing
    ○ Installation Testing
  • Functions that are tested
    In non-functional testing, response of your software application is evaluated. It discovers how much time your software takes to respond to end user responses or queries
    Non-functional testing is performed usually after the functional testing completed and it is performed by software quality assurance group. Non-Functional assessment also means finding defects or bugs within UI. It is actually carried out to support Functional testing.
    Non-Functional testing services confirm that the software will continue to work in production environment and can provide steady and predictable services. It measures resource usage, includes high-level stress testing, testing for system break, as well as testing for performance bottlenecks.
    Non-Functional Testing services, tests the application form against client’s satisfaction. Non-Functional testing is performed against certain requirements and test cases defined by your client.