DerivedSolutionTest.java
/*
* Copyright (c) 2021 Mārtiņš Avots (Martins Avots) and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0, or the MIT License,
* which is available at https://spdx.org/licenses/MIT.html.
*
* SPDX-License-Identifier: EPL-2.0 OR MIT
*/
package net.splitcells.gel.problem.derived;
import net.splitcells.gel.constraint.type.Then;
import net.splitcells.gel.data.table.attribute.AttributeI;
import net.splitcells.gel.rating.type.Cost;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import static net.splitcells.dem.data.set.list.Lists.list;
import static net.splitcells.dem.testing.TestTypes.INTEGRATION_TEST;
import static net.splitcells.gel.rating.rater.RaterBasedOnLineValue.lineValueBasedOnRater;
import static net.splitcells.gel.rating.type.Cost.cost;
import static net.splitcells.gel.rating.type.Cost.noCost;
import static net.splitcells.gel.solution.SolutionBuilder.defineProblem;
import static net.splitcells.gel.solution.optimization.primitive.LinearInitialization.linearInitialization;
import static org.assertj.core.api.Assertions.assertThat;
public class DerivedSolutionTest {
@Tag(INTEGRATION_TEST)
@Test
public void test_rating_manipulation_from_start() {
final var derivedCostManipulationFactor = 11;
final var complianceValue = 5;
final var defianceValue = 7;
final var defianceCost = 3;
final var attribute = AttributeI.attribute(Integer.class);
final var rootSolution = defineProblem()
.withDemandAttributes()
.withDemands(
list()
, list()
, list()
, list())
.withSupplyAttributes(attribute)
.withSupplies(
list(complianceValue)
, list(defianceValue)
, list(complianceValue)
, list(defianceValue))
.withConstraint(
Then.then(lineValueBasedOnRater(line -> {
if (line.value(attribute).equals(complianceValue)) {
return noCost();
} else {
return cost(defianceCost);
}
})))
.toProblem()
.asSolution();
final var testSubject
= rootSolution
.derived(novērtējums ->
cost(novērtējums.asMetaRating().getContentValue(Cost.class).value()
* derivedCostManipulationFactor).asMetaRating());
assertThat(rootSolution.constraint().rating()).isEqualTo(cost(0));
assertThat(testSubject.constraint().rating()).isEqualTo(cost(0));
rootSolution.optimize(linearInitialization());
assertThat(rootSolution.constraint().rating()).isEqualTo(cost(2 * defianceCost));
assertThat(testSubject.constraint().rating()).isEqualTo(
cost(2 * defianceCost * derivedCostManipulationFactor));
}
@Tag(INTEGRATION_TEST)
@Test
public void test_rating_manipulation_after_solution_optimization() {
final var derivedCostManipulationFactor = 11;
final var complianceValue = 5;
final var defianceValue = 7;
final var defianceCost = 3;
final var attribute = AttributeI.attribute(Integer.class);
final var rootSolution = defineProblem()
.withDemandAttributes()
.withDemands(
list()
, list()
, list()
, list())
.withSupplyAttributes(attribute)
.withSupplies(
list(complianceValue)
, list(defianceValue)
, list(complianceValue)
, list(defianceValue))
.withConstraint(
Then.then(lineValueBasedOnRater(rinda -> {
if (rinda.value(attribute).equals(complianceValue)) {
return noCost();
} else {
return cost(defianceCost);
}
})))
.toProblem()
.asSolution();
rootSolution.optimize(linearInitialization());
final var testSubject
= rootSolution
.derived(novērtējums ->
cost(novērtējums.asMetaRating().getContentValue(Cost.class).value()
* derivedCostManipulationFactor).asMetaRating());
assertThat(rootSolution.constraint().rating()).isEqualTo(cost(2 * defianceCost));
assertThat(testSubject.constraint().rating()).isEqualTo(
cost(2 * defianceCost * derivedCostManipulationFactor));
}
}