Paper 2 - Testing and Design

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what is defensive design

a method of designing a program so that it functions properly and doesn’t crash

what ways do programmers try to protect their programs through defensive design

anticipate how users might misuse their program

ensure their code is well maintained

reduce the number of errors in code through testing

what is input validation

checking if data meets certain criteria before passing it into the program

what is range check

checks the data is within a specified range

what is presence check

checks the data has actually been entered

what is a format check

checks the data has the correct format

what is a look-up table

checks the data against a table of acceptable values

what is length check

checks the data is the correct length

what is authentication

a process for checking the identity of the user

what is a syntax error

a grammatical error in code for the programming language

what is a logic error

an error made by the programmer where the program will still run but will output an unexpected result

what are the 2 main types of testing

iterative testing

terminal testing

what is iterative testing

repeated testing of a program during the development process

what is terminal testing

testing the whole program at the end of the development process

what are the categories your test data should fall into

normal data

boundary data

invalid data

erroneous data

what is normal data

things that a user is likely to input into the program

what is boundary data

values at the limit of what the program should be able to handle

what is invalid data

test data with a correct data type that a program should reject

what is erroneous data

inputs with an incorrect data type that should be rejected by the program