Independent Software Testing Companies: Ways of Reproducing Program Errors
The error leading to devastating consequences
It sometimes happens that the consequences of software error are so disruptive therefore it may not be immediately reproduced, or maybe you will not want to do that. For example, the program can destroy files, write to the critical areas of memory, lock the system, etc. Before setting out to reproduce a program error, you would first have to recover the system.
Here is an example of the situation relating to this error. The user sends you a floppy disk with the data which, when processed, cause the program to fail. You run a program, and it destroys the data on this disk. Error has been successfully reproduced, but in order to repeat the procedure, it will be necessary to ask the user to send the data again. Based on many years’ experience and expertise in the field, independent software testing companies strongly recommend you:
Always make backup copies of the data before reproducing errors so that to avoid the abovementioned problems.
Never, never, never work with the original data – only with the copies.
The error associated with the amount of memory
Program crash can occur only under certain conditions related to the type, volume and structure of available memory. In this case it is useful to insert debugging messages about an amount of available memory into the program when the memory is loaded and used for the key tasks. These messages can be displayed by the program if pressing a certain key, and sometimes they even are not removed from the final version of the product for its continued support.
Be aware, that performance problems often arise when the applications are not subjected to certain type of verification. Load testing companies run such tests that help to determine the program’s behavior under specified load conditions and optimize its performance parameters.
The error occurring only on the first run of the program
The first thing many programs do after their initial launch is read the initialization information from the disk. If in the very first run of the program, the initialization files lack the necessary information, the program may behave unpredictably. However, when you exit the program it will save the correct data in these files, and then everything will go well. This error occurs only once, and it could be considered harmless, if not for the fact that every user will encounter it sooner or later.
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