de.rwth.swc.coffee4j.engine.generator.ipog

Interface ParameterCombinationFactory

All Known Implementing Classes:

TWiseParameterCombinationFactory

public interface ParameterCombinationFactory

An interface for a factory defining which combinations of parameters need to be tested. In every iteration of the IPOG algorithm, the test suite is expanded to the next parameter defined by a ParameterOrder. Since all combinations between the last iterations' parameters are already covered, this only needs to return the combinations between the old parameters, which, together with the current parameter, should be covered. This means, that if all 2-value-combinations should be covered for an IPM having 4 parameter numbered 0 through 3, the following combinations would be returned after iterations for parameter 0 and 1 have already been done and the strength is 2: {0}, {1}. Internally, IPOG will append the current parameter to all of these sets. This means that it knows the parameter combinations {0, 2} and {1, 2} should be covered. The combination {0, 1} is not relevant since it is already covered in the last iteration.

Method Summary

Modifier and Type	Method and Description
List<it.unimi.dsi.fastutil.ints.IntSet>	create(int[] oldParameters, int strength) Calculates which parameter combinations should be covered in the next step.

Method Detail

create

List<it.unimi.dsi.fastutil.ints.IntSet> create(int[] oldParameters,
                                               int strength)

Calculates which parameter combinations should be covered in the next step. The factory can only implicitly know the next parameter through the ParameterOrder used.

Parameters:

oldParameters - the parameters already set by IPOG in horizontal expansion

strength - the strength of the test suite which should be generated

Returns:

all combinations of old parameter which should be covered together with the next parameter