At present, significant work is being done to create and implement formalized methods in most large-scale developments, but such development is not yet widely used in practice.
This principle follows from the fact that testing is a destructive process. After completing the constructive piece of work required to design and write a software program, it is difficult for the programmer to quickly (within one day) change thinking from constructive to destructive.
Many who have had to make home repairs themselves know that the process of removing old wallpaper (the destructive process) is not easy, but it is simply unbearable, if not someone else, but you hung them yesterday. And you will not make up your mind to strip them off, if the sheets are pasted slightly unevenly to the wall. That is the way most programmers cannot effectively test their programs, because they find it difficult to report their own mistakes.
Mobile testing as a service is widely used worldwide because a lot of mobile apps want debugging and upgrading. It helps to ensure smooth performance of programs designed for hand-held devices.
This is really a strong psychological factor common to collective development. The programmer, carefully debugging the program, can unwittingly work more slowly, and this becomes known to other participants of the development project. On the other hand, he is forced to ask additional computer time for debugging from his immediate supervisor. Thus, the testing results are no longer just a concern of one person testing the program (while in the majority of cases, its author), but also information that arouses public interest (and evaluation!) namely interest of the development participants, including the project leaders. The prospect of building an opinion of himself as a specialist who makes many mistakes does not inspire the programmer, and he subconsciously reduces the requirements for thorough testing. In such a situation, the development managers at all ranks need to exercise a keen sense of tact and have understanding of the processes to encourage professionals who perform thorough testing and be able to distinguish and limit the activities of programmers who conceal their negligence by testing difficulties.
In addition to this psychological problem, it should be noted one more, no less important: the program may contain errors related to misunderstanding of the statement or description of the task by the developer. Then there is a possibility that the developer will start testing while having the same misunderstanding of his task.
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