Formal Test Cases
In order to fully test that all the requirements of an application are met, there must be at least two test cases for each requirement: one positive test and one negative test. If a requirement has sub-requirements, each sub-requirement must have at least two test cases. Keeping track of the link between the requirement and the test is frequently done using a traceability matrix. Written test cases should include a description of the functionality to be tested, and the preparation required to ensure that the test can be conducted.
A formal written test-case is characterized by a known input and by an expected output, which is worked out before the test is executed. The known input should test a precondition and the expected output should test a postcondition.
Read more about this topic: Test Case
Famous quotes containing the words formal, test and/or cases:
“The formal Washington dinner party has all the spontaneity of a Japanese imperial funeral.”
—Simon Hoggart (b. 1946)
“No drug, not even alcohol, causes the fundamental ills of society. If were looking for the sources of our troubles, we shouldnt test people for drugs, we should test them for stupidity, ignorance, greed and love of power.”
—P.J. (Patrick Jake)
“Lovers quarrels are not generally about money. Divorce cases generally are.”
—Mason Cooley (b. 1927)