de.learnlib.oracle.equivalence

Class WMethodEQOracle<A extends UniversalDeterministicAutomaton<?,I,?,?,?> & Output<I,D>,I,D>

java.lang.Object

de.learnlib.oracle.equivalence.AbstractTestWordEQOracle<A,I,D>

de.learnlib.oracle.equivalence.WMethodEQOracle<A,I,D>

Type Parameters:

A - automaton type

I - input symbol type

D - output domain type

All Implemented Interfaces:

EquivalenceOracle<A,I,D>

Direct Known Subclasses:

WMethodEQOracle.DFAWMethodEQOracle, WMethodEQOracle.MealyWMethodEQOracle

public class WMethodEQOracle<A extends UniversalDeterministicAutomaton<?,I,?,?,?> & Output<I,D>,I,D>
extends AbstractTestWordEQOracle<A,I,D>

Implements an equivalence test by applying the W-method test on the given hypothesis automaton, as described in "Testing software design modeled by finite state machines" by T.S. Chow.

Author:

Malte Isberner

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WMethodEQOracle.DFAWMethodEQOracle<I>
static class	WMethodEQOracle.MealyWMethodEQOracle<I,O>

Nested classes/interfaces inherited from interface de.learnlib.api.oracle.EquivalenceOracle

EquivalenceOracle.DFAEquivalenceOracle<I>, EquivalenceOracle.MealyEquivalenceOracle<I,O>

Constructor Summary

Constructors

Constructor and Description
WMethodEQOracle(MembershipOracle<I,D> sulOracle, int maxDepth) Constructor.
WMethodEQOracle(MembershipOracle<I,D> sulOracle, int maxDepth, int batchSize) Constructor.

Method Summary

Modifier and Type	Method and Description
protected Stream<Word<I>>	generateTestWords(A hypothesis, Collection<? extends I> inputs) Generate the stream of test words that should be used for the current equivalence check cycle.
void	setMaxDepth(int maxDepth)

Methods inherited from class de.learnlib.oracle.equivalence.AbstractTestWordEQOracle

findCounterExample

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WMethodEQOracle

public WMethodEQOracle(MembershipOracle<I,D> sulOracle,
                       int maxDepth)

Constructor.

Parameters:

sulOracle - interface to the system under learning

maxDepth - the maximum length of the "middle" part of the test cases

WMethodEQOracle

public WMethodEQOracle(MembershipOracle<I,D> sulOracle,
                       int maxDepth,
                       int batchSize)

Constructor.

Parameters:

sulOracle - interface to the system under learning

maxDepth - the maximum length of the "middle" part of the test cases

batchSize - size of the batches sent to the membership oracle

Method Detail

setMaxDepth

public void setMaxDepth(int maxDepth)

generateTestWords

protected Stream<Word<I>> generateTestWords(A hypothesis,
                                            Collection<? extends I> inputs)

Description copied from class: AbstractTestWordEQOracle

Generate the stream of test words that should be used for the current equivalence check cycle.

Specified by:

generateTestWords in class AbstractTestWordEQOracle<A extends UniversalDeterministicAutomaton<?,I,?,?,?> & Output<I,D>,I,D>

Parameters:

hypothesis - the current hypothesis of the learning algorithm

inputs - the collection of inputs to consider

Returns:

the stream of test words used for equivalence testing

See Also:

EquivalenceOracle.findCounterExample(Object, Collection)