2.3.2 - Testing

To ensure that a program runs without errors, does what is expected and meets user requirements.

regular testing a small section of the code during development to see if it works. Done during development of the code until it works exactly how the programmer wants it to

Carried out during the end of development once the code is believed to be complete and iterative tesing has been done on all the parts

Not following the grammatical rules of the programming language. This means the program can’t be run and an error is reported by the IDE

• Missing brackets • Misspelling terms e.g print as pint • Not declaring variables

A mistake in a calculations or comparison that leads to an unexpected output. The program will still run however.

Sensible data that lies within the test range. It should be accepted into a program with no errors.

The upper and lower limits of valid data (data on the edges of the valid range)

Data of the correct type, but outside the validation limit (range)

Data of the incorrect type, which will be rejected by the system e.g. a string in an integer input

• Using AND and OR wrong • Using < and > wrong • MAking an infinite loop