There seems to be a massive advantage and the cutting edge when you use Agile methodology to testing your program. The Agile methods emphasizes in reducing a lot of friction in testing and bug fixing which is said to be the reason for the popularity of Agile.
Entire team is responsible for the Quality
Usually in the conventional fall method of Software development, testing will be done only after the development is completed but varies in Agile where the entire team is responsible for the quality. Generally in the agile set up, the team mix discipline where you could find one tester working with one or more developers. The unit tests will be often written by the developers as more features will be added by them and then use these unit tests to test the application frequently as they keep on adding features. Test cases will be written by the testers and the new codes will be tested according to the build as it is being completed catching bugs and the feedback are almost given immediately to the developers.
As the testers and the developers work in the same team, the chances of communicating to each other is much more easier. The developers have the advantage so that they could nudge the testers on the shoulder and tell exactly what needs to get more detail and to get a response right there, If a bug reports needs more detail. To catch issues in advance an addition of daily scrum helps and also nourishes to keep the important issues in the spotlight.
Defects are Easy to Fix
Since the developers are working with the testers on the same team, almost immediate feedback will be provided by them so the at the developer could fix the bug while the code is still fresh in the mind.
Whereas in the waterfall environment, the entire projects will be taken months back if there is a major bug as the bug fixes will usually interact with the other code in a numerous ways requiring cascading changes throughout the code base.
Since the Bugs in the development are found earlier, when compared to waterfall with the agile development the dependencies of cascading numbers are nearly the same.
Fewer Changes Between Fixes
Generally in waterfall development, the possibilities of change in the code base substantially between when a bug is detected and when a developer is assigned the job of fixing it. On trying how to reproduce a bug will result in added time spent. Time between coding and testing is so close in Agile, Finding the bug will be more difficult as the developer wont have enough time to add new code to the project.
Flexibly Incorporate New Requirements
When the business requirements are planned and outlined at the start of the project makes the best out of waterfall methodology. Business requirements are far from immutable, this is well known for anyone who had worked even in the simple applications. Change requests and enhancements are incorporated while the work is being done and that’s the design of Agile methodology.
The teams are being locked in the short sprints so that each of the team member could focus on completing a small set of features. Inclusion of adding new, unplanned and modifying already existing ones if that is what is best is also a part of Agile.
Testing Can’t Be Cut
In the Software development life cycle testing is done continuously, it can’t be cut. At least, it can’t be cut by much. Testing is cut in order to meet deadlines often in waterfall projects. This results in bad software being sent to users. Sometimes in stunningly bad software.