Specifying Test Objectives

Use the Values parameter to define custom objectives that signals must satisfy in test cases. Specify any combination of scalars and intervals in the form of a MATLAB^® cell array. For information about cell arrays, see Cell Arrays.

Scalar values each comprise a single cell in the array, for example:

{0, 5}

A closed interval comprises a two-element vector as a cell in the array, where each element specifies an interval endpoint:

{[1, 2]}

Alternatively, you can specify scalar values using the Sldv.Point constructor, which accepts a single value as its argument. You can specify intervals using the Sldv.Interval constructor, which requires two input arguments, i.e., a lower bound and an upper bound for the interval. Optionally, you can provide one of the following values as a third input argument that specifies inclusion or exclusion of the interval endpoints:

As an example, the Values parameter

{0, [1, 3]}

specifies:

The Values parameter

{Sldv.Interval(0, 1, '[)'), Sldv.Point(1)}

specifies:

Logical Behavior of Specifications

If you specify multiple scalars and intervals for a Test Objective block, the Simulink Design Verifier software combines them using a logical OR operation when generating test cases. Consequently, the software considers the entire test objective to be satisfied if any single scalar or interval is satisfied.

Within a single scalar or interval, a test objective is generated with a logical AND operation. In this case, all signals must satisfy the constraints in order for the input to satisfy the objective.

For example, consider a two-dimensional open interval:

Sldv.Interval([-5 -5],[5 2],'()')

The zero vector [0 0] satisfies the objective because the zero elements are within the intervals -5 to 5 and -5 to 2.

The vector [0 3] does not satisfy the objective because the second element 3 falls outside the interval -5 to 2.