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What is static unit testing?

With so much of complexity in programs, both dynamic unit testing and static unit testing are necessary. In this article we discuss exclusively up on static unit testing to have a better understanding of this methodology.

About Static Unit Testing

– Static unit testing involves testing of units or modules of the software system or application without actually putting it in to the compilation and execution.
– Static testing is therefore completely opposite from the dynamic unit testing where the individual units or modules are put under compilation and execution for testing.
– Static testing does not deal with the depth of the software system or application but tests it on the surface.
– It checks for the correctness and verification of the program code, algorithm and not to forget the documentation.
– Basically, the syntax of a program is what that is checked thoroughly in static unit testing.
– Static unit testing cannot be carried by one individual alone.
– It requires a whole team of professionals to accomplish this job since error that one cannot find, can be spotted by someone else.
– Also, static unit testing needs to be carried out manually because it is something that you cannot automate.
– Many of the coding blunders can be spotted easily in static unit testing.
– Also, the team which is to carry out static unit testing needs to be qualified since the program is compiled manually so the testers should have a good deal of knowledge of programming.
– The person who has coded the program can also review his code to check for syntactical errors.
– A number of methodologies have been developed for static unit testing out of them the most common ones being the following:
1. Code inspections
2. Code reviews and
3. Code walk throughs

– Reviewing the specifications as well as users requirements a number of times is an important part of static unit testing.
– The requirements and specifications both need to be reviewed manually just like the code of the individual units or modules but comparatively this is a tough task.
– One of the parts of the verification and validation process is static unit testing.
– Since it is a hectic task to test all units as such, some testing tools have been used to automate the entire process.
– This tools works by passing the program code through a testing suite that has been exclusively made for static testing.
– This test suite scans the software code for verification as well as syntax errors.
– The biggest advantage offered by static unit testing is that the errors discovered now are easier to correct than those that will be found later.
– Software professionals who handle this task of static unit testing are typical software application developers and professional testers.
– However, the activities that constitute the static unit test are basically concerned with verification part.
– The following standards are followed while carrying out the static unit testing:
1. Standard for integration
2. Standard for deployment and
3. Standard for coding.

– The static testing is better performed manually but these days more and more organizations are opting for automated solutions to save on the development time.
– Static unit testing when carried out manually is termed as either program comprehension or program understanding.
– The quality of the static unit testing is performed depends on the individual performing and varies from one to other.
– Some testers take only one unit for testing at a time while others prefer to test them in module.
– Also, nowadays the concepts such as reverse engineering, software metrics and so are being taken in to consideration for carrying out efficient static unit testing.
– Typically, static unit testing is deployed wherever the computer systems need peak safety as it helps in rooting out the potentially dangerous code.
– Formal static unit testing involves:
1. Axiomatic semantics
2. De-notational semantics
3. Operational semantics etc.

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