Testing Techniques in Agile Software DevelopmentTDD, BDD and AMDD are the techniques in software testing that can be applied to any methodology. TDD is Test-Driven Development. The unit tests are written first, then a code is written to make the tests pass. BDD is Behavior-Driven Development. This technique also follows the technique of writing the tests followed by code to pass the tests but functions at a slightly higher level than TDD. AMDD is Agile Model Driven Development (MDD). It is an approach in Software Testing where multiple models are created before the source code is written.
TDD – A Convenient practice in Software TestingTest-driven development is basically a software development process that depends upon the repetition of a mini development cycle. To start with the developer writes an automated test case that represents a room for improvement or adding a new function, then produces a shortcode to pass that test, and lastly restructures the new code that meets the coding standards. There are several questions related to TDD, which includes: Which are the right tools to be used in TDD? What is the difference between Test Driven and Behaviour Driven Development? In order to develop a better software with lesser bugs and newer features, as well as in lesser time, programmers opt for test-driven development. Test-Driven Development works in 6 simple steps:
- Add a test and Ensure that at least one of the tests will fail.
- Run all tests and review the results
- Write some code
- Run tests
- Refactor code
- Quick and accurate results
- Automatic in regression tests.
- Features List
- Accurate Interfaces
- Cleaner Code
- Relevant Dependencies
- Safer Restructuring
- Lesser Bugs
- Increase in ROI
- Documentation Support
Behaviour Driven Development: It’s Test Driven Development Done RightFrom the above mentioned about TDD, we are quite clear that Test Driven Development is the process of writing a test first, and software code afterward. Well, Isn’t that a bit confusing? If the code is not written yet, what should I exactly test? Those where all the questions popping around, which resulted in the development of a new approach – Behaviour Driven Development. Dan North was the one who came up with this approach. He proposed that it’s important to identify how the user wants the application to behave and so it’s important to specify the behavior of the application instead of just writing the tests. Both Test Driven Development(TDD) and Behaviour Driven Development are approaches to developing software. They specify the behavior of a piece of code or the whole feature as a set of scenarios or tests before writing actual code and only then creating the implementation that allows these tests to pass verifying that intended behavior is achieved. Long story short, BDD is an enhancement to TDD.
Test-Driven Development (TDD) vs. Behaviour-Driven Development (BDD)Behaviour Driven Development is written in a format that is readable even by non-programmers since it is in English, unlike TDD test cases are written in programming languages such as Ruby, Java etc. BDD is an approach that defines the end user, a behavior of an application on the other hand TDD focuses more on how functionality is to be implemented. In such cases, changes in functionality don’t impact the application much in BDD as opposed to TDD. Since BDD is understandable by all the non-programmers as well, everyone involved is clear with the requirements which makes acceptance easy, as opposed to TDD.
Comparing TDD with Agile Model-Driven Development (AMDD)
- TDD focuses on minimizing programming loop whereas AMDD focuses on minimizing modeling loop.
- TDD provides the detailed specification (tests) whereas AMDD is better for thinking through bigger issues.
- TDD gives high-quality code output whereas AMDD delivers high-quality communication with your team members and stakeholders.
- TDD ensures that your software works accurately whereas AMDD coordinates with the entire team in working toward a common understanding.
- TDD involves communication with programmers whereas AMDD involves communication with business analysts and stakeholders.
- TDD ensures that your application design is clean by performing multiple tests, whereas AMDD provides an opportunity to focus on larger design/architectural issues before you code.
- Both techniques support evolutionary development.
Automation Testing – What makes it important?Performing Manual software testing means a human sitting in front of a computer, going through each and every application screens, performing a variety of usage and input combinations, making the comparison of the results with the expected behavior and recording their observations. In case of source code changes or other situations like multiple operating environments and hardware configurations are repeated often during development cycles for source code changes and other situations like multiple operating environments and hardware configurations; manual tests are to be repeated more often. Wherein an automated testing tool has the capability to pullback previously recorded and defined actions and is also able to compare the results to the expected behavior and report the success or failure of the manual tests to a test engineer. Automated software testing is believed to be an essential component in the software development process because it performs the tasks that are impossible with manual testing.
Benefits of Automation Testing
- Automated Software Testing Saves Time and Money
- Test Coverage is increased enormously
- Testing boosts Accuracy
- Automation Does What Manual Testing Cannot
- Automated Testing Helps Developers and Testers to diagnose the problem quickly before sending it QA
- Automated testing improves the team Morale of QA and Developers