Definition

An analysis method that determines which parts of the software have been executed (covered) by the test case suite and which parts have not been executed and therefore may require additional attention.

[Source: BCS]

Comment

Code coverage describes the degree to which the source code of a program has been tested. It is a form of testing that inspects the code directly and is therefore a form of White box testing.

Code coverage was among the first methods invented for systematic software testing.

Also see: Coverage, White box test