Linear Code Sequence And Jump (LCSAJ)

LCSAJ means A Linear Code Sequence And Jump, consisting of the following three items (conventionally identified by line numbers in a source code listing): the start of the linear sequence of executable statements, the end of the linear sequence, and the target line to which control flow is transferred at the end of the linear sequence.

LCSAJ testing is a test case design technique for a component in which test cases are designed to execute LCSAJs.

An LCSAJ is defined as unbroken linear sequence of statements:
(a) Which begins at either the start of the program or a point to which the control flow may jump,
(b) Which ends at either the end of the program or a point from which the control flow may jump?
(c) And the point to which a jump is made following the sequence.

LCSAJ coverage = I/L
Where: I = Number of LCSAJs exercised at least once.
L = Total number of LCSAJs.

LCSAJs depends on the topology of a module's design and not just its semantics, they do not map onto code structures such as branches and loops. LCSAJs are not easily identifiable from design documentation. They can only be identified once code has already been written. LCSAJs are consequently not easily comprehensible.

Definitions:

LCSAJ: A Linear Code Sequence And Jump, consisting of the following three items (conventionally identified by line numbers in a source code listing): the start of the linear sequence of executable statements, the end of the linear sequence, and the target line to which control flow is transferred at the end of the linear sequence.

LCSAJ coverage: The percentage of LCSAJs of a component which are exercised by a test case suite.

LCSAJ testing: A test case design technique for a component in which test cases are designed to execute LCSAJs.