Perfect Guide for Testing Methodologies - Know all about Software Testing Methodologies?

Introduction to Testing Methodologies: What are Software Testing Methodologies?

Testing methodologies in software engineering are testing strategies, approaches or methods used to test a specific product to ensure its usability. It makes sure that product works as per the given specifications and has no side effects when used outside the design parameters. Software testing methodologies encompass everything from unit testing to integration testing and specialized form of testing like security or performance testing.

Why are Software Testing Methodologies important?

• It manages your project requirements, test cases, bugs, issues in a single integrated environment, with full traceability throughout the testing lifecycle.
• It is complete testing solution that includes requirements management, test case designs, release management, defect tracking etc from day one.
• It is a highly intuitive testing approach that provides a complete picture of the software product and health status.
• It can leverage your current technology investments with many automated testing solutions and third-party defects management systems.

QA Testing Methodology - Functional vs Non-functional Testing Methodologies

The objective of testing methodologies in the development process is to make sure that software can successfully operate in multiple environments across different platforms. QA testing methodology can further be divided into a functional testing methodology or a non-functional testing methodology.

Functional testing involves application testing against business requirements that includes multiple test types designed to guarantee that each part of the software behaves in the same way as expected by the users. The software application can also be tested by utilizing use-cases by business analysts or the design team. Here are the software testing methodologies that come under functional testing.

Non-functional testing methods incorporate different test types focused on the operational aspects of a piece of software. These are:

The key to releasing high-quality software can be easily adopted by end-users by building a robust testing framework that implements both functional and nonfunctional software testing methodologies.

Unit Testing

• It is the beginning level of testing that is usually performed by the Developers in a test-driven environment write and run test cases before the software is passed over to the testing team.
• Unit testing is a software testing methodology which makes sure that individual components of software at the code level are working perfectly for which purpose they are designed to.
• Unit testing can be done either manually or it can be automated. The automation process speed-up the delivery cycles and expands the test coverage too.
• Unit testing makes the debugging easy because bugs are detected much earlier and easy to fix by the testing team.

Integration Testing

• Once each unit is tested thoroughly, it is integrated with other units to create modules or components that are designed to perform specific activities or tasks.
• The different software units are generally tested together to ensure whole segments of an application behave as expected.
• The integration is a software testing methodology which makes sure that interaction among different software units is seamless.
• It can be performed by developers or users both based on requirements.
• Integration testing is a combination of manual tests and automated functional units and is a very important QA testing methodology.
• Integration tests are usually framed by user scenarios like logging to an application, accessing files and more.

System Testing

• System testing is the black box testing method used to evaluate the integrated system as a whole and ensures it meets all specific requirements.
• In the case of system testing, the functionality of the product is tested end-to-end and it is usually performed by the testing team, not by the development team.
• System testing is performed before pushing the software product into production.

Acceptance Testing

• Acceptance testing is the last phase of the functional testing to assess the final piece of software for delivery.
• It makes sure that the product is in compliance with the original business criteria and meets the end user needs completely.
• It performs testing internally and externally. It means the product is given into the hands of users for beta testing and it is tested by the quality team too.
• Beta testing is key to getting potential feedback from users and address them before the final product delivery.

Performance Testing

Performance testing is the non-functional testing technique used to determine how an application will behave under different conditions. The goal is to check the stability of a product in real-life situations. The performance testing is broken down into four pieces ahead.

Read: What is UAT? User Acceptance Testing Best Practices

• In the case of load testing, your software product, website, or application is tested under heavy loads to ensure its load handling capacity.
• The stress testing explains how a software product will behave under the maximum load conditions. It helps you to identify the failure points of an application.
• The endurance or soak testing is used to analyze the behavior of an application under simulated load for a longer period. The biggest advantage of using endurance testing is that it helps to find memory leaks.
• Spike testing is used to check how an application system will behave if load increases or decreases suddenly.

Security Testing

With the increase of cyber-attacks and cloud platforms, there is an emergency need for securing the data that is stored within software programs. It is a non-functional type of testing that ensures either a software system is protected or not.

• The goal of security testing is finding loopholes and security risks in the system.
• It helps to prevent unauthorized access and loss of information by probing the application for weaknesses.
• It majorly works on six security principles as given below.

Usability Testing

• It is the non-functional testing technique used to check the product usability from the end-user perspective.
• It is often performed during the acceptance or system testing stages.
• it is used to determine either visible design or aesthetics of an application meet the intended workflow for multiple processes.
• It is used by the team to review separate functions or the system as a whole.

Compatibility Testing

• It is used to check how a piece of software will work in different environments.
• It is used to check the compatibility of a product for various platforms, operating systems, browsers etc.
• It makes sure that the functionality of the product is consistently supported across any environment that can be utilized by the user.

The key to releasing high-quality software can be easily adopted by end-users by building a robust testing framework that implements both functional and nonfunctional software testing methodologies.

QA Testing Methodologies- Development Models

Since Software Testing is an integral part of any Development Methodology, many companies use the term Development Methodologies & Testing Methodologies colloquially. Hence testing methodologies could also refer to Waterfall, Agile and other QA testing methodologies models as against the above definition of Testing Methodologies. Discussion on various testing types does not add value to the readers. Hence, we will discuss every model for testing in software testing methodologies

Since software development and software testing are integrated, many companies use development methodologies and testing methodologies colloquially. Hence development could refer to waterfall, iterative, V Model, RAD, Spiral, and Agile methodologies. Here we will discuss the model for testing in software testing methodologies in brief.

Read: What is Regression Testing? Regression Testing Tutorial Guide for Beginners

1). Waterfall Model

In the waterfall model, the progress of software development is checked through different phases like requirement phase, analysis, or design phase etc. The next phase begins only when the earlier phase is completed. The first phase in the waterfall model is the requirement phase where project details are clearly defined in advance before we start with software testing. In this phase, the test team brainstorms the scope of testing, testing objectives, testing strategies etc.

2). Iterative Model

In this model, a bog complex project is divided into small chunks and each part is subjected to multiple iterations of the waterfall model. At the end of each iteration, a new module is added or the existing module is enhanced. Later, modules are integrated into the software architecture and the entire system is tested together.

The feedback for each iteration is quickly available incorporated into next cycle. The total testing time can be reduced for future iteration by the experience gained from past iterations.

3). Agile Methodology

An agile model uses an iterative and incremental approach together. It breaks up the product into small incremental units to provide iterations. Further, each iteration involves steps like requirements, design, coding, testing etc. This approach allows continuous interaction with customers, collects feedback, and improves the current build at regular time intervals. Here are the reasons why should you adopt the agile methodology for your software project. In fact, it is considered to be the best model for testing in software testing methodologies, by some. Here are the reasons why you should adopt the agile methodology for your software project.

• It is considered as the most realistic approach to software development.
• It promotes teamwork by regulating interactions among team members.
• It eliminates mismatch between test cases and requirements.
• It is rapid and needs a minimum number of resources.
• It is good for rapidly changing requirements.
• It is easy to manage when compared to other development phases.

4). V Model

V model is an extension of the waterfall model where development work is done sequentially. It is also named as the verification or validation model. It includes testing phases directly associated with every single phase of the development cycle. It is more beneficial and cost-efficient when compared to the waterfall model because testing is performed side by side instead of completing it at the end.

5). RAD Model

It is a type of incremental model where components are developed in parallel. It is a rapid approach that accelerates deployment and provides feedback. The multiple phases in the RAD model include business modeling, data modeling, process modeling, application generation, testing etc. The highlighting benefits of the model include progress measurement, reduced development cycles, enhanced reusability, quick feedback, and reviews.

6). Spiral Model

The spiral model incorporates the iterative development approach and waterfall approach together. It is similar to the incremental model with more focus on risk analysis. The different phases of the Spiral model include the planning phase, Risk analysis, Evaluation, and Engineering phase etc.

Read: Automation Testing Tutorial Guide for Beginner

Which Software Methodology to Choose?

There are tons of QA testing methodologies available that are designed for a specific purpose with its own merits and demerits. The selection of a software methodology depends on multiple factors like the nature of the project, what are the client requirements, project schedule etc. In some cases, testing and development go side by side while others includes testing during later phases when the build is ready.

Setting up Software Testing Methodologies

Testing methodologies are not used just for the sake of code testing but they are used for other purposes too. Here is how to set up the testing methodologies in software engineering.

• Scheduling: Realistic scheduling is key to implementing testing methodology successfully that it should meet the requirements of each member in the team.
• Define deliverables: The project deliverables should be well defined to keep all members of the team on the same page.
• Test Approach: Once you are done with scheduling and project deliverables are defined well without any ambiguity, the next step is formulating the right test approach.
• Reporting: Transparency is given the high importance to implement any testing methodology without failure. This step will dictate the effectiveness of the test approach and changes required for setting up the testing methodology successfully.

Final Words:

As software apps get complex when intertwined with a large number of modules, platforms, or devices that need to be get tested regularly, it is necessary to adopt robust testing methodologies to make sure that software products being developed are fully tested, meet necessary requirements and successfully operate in all anticipated environments with the needed usability or security.

Read: Interview Questions for Automation Testing & the Best Answers!