ProblemTest.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;
import net.splitcells.gel.constraint.ConstraintTest;
import net.splitcells.gel.constraint.type.Then;
import net.splitcells.gel.data.table.Line;
import net.splitcells.gel.solution.Solution;
import org.junit.jupiter.api.Test;
import static net.splitcells.dem.data.order.Ordering.EQUAL;
import static net.splitcells.dem.data.set.list.Lists.list;
import static net.splitcells.gel.rating.rater.ConstantRater.constantRater;
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 org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertTrue;
class ProblemTest {
@Test
void testEmptyProblem() {
Solution solution = defineProblem()
.withDemandAttributes()
.withSupplyAttributes()
.withConstraint(Then.then(constantRater(cost(7))))
.toProblem().asSolution();
assertTrue(solution.isComplete());
assertTrue(solution.isEmpty());
assertThat(solution.constraint().rating().compare_partially_to(cost(0)).get())
.isEqualTo(EQUAL);
}
@Test
void testUnbalancedProblem() {
var defaultCost = 7;
@SuppressWarnings("unchecked") //
Solution solution = defineProblem()
.withDemandAttributes()
.withDemands(list(), list())
.withSupplyAttributes()
.withSupplies(list(), list(), list())
.withConstraint(Then.then(constantRater(cost(defaultCost))))
.toProblem().asSolution();
assertThat(solution.isComplete()).isFalse();
assertThat(solution.rawLinesView()).isEmpty();
assertThat(solution.constraint().rating().compare_partially_to(noCost()).get())
.isEqualTo(EQUAL);
final Line firstAllocation;
{
firstAllocation = solution.allocate
(solution.demandsFree().rawLinesView().get(0)
, solution.suppliesFree().rawLinesView().get(0));
assertThat(solution.size()).isEqualTo(1);
assertThat(solution.isComplete()).isFalse();
assertThat(solution.constraint().rating().compare_partially_to(cost(defaultCost)).get())
.isEqualTo(EQUAL);
}
final Line secondAllocation;
{
secondAllocation = solution.allocate
(solution.demandsFree().rawLinesView().get(1)
, solution.suppliesFree().rawLinesView().get(1));
assertThat(solution.size()).isEqualTo(2);
assertThat(solution.isComplete()).isTrue();
assertThat(solution.constraint().rating().compare_partially_to(cost(2 * defaultCost)).get())
.isEqualTo(EQUAL);
}
{
solution.remove(firstAllocation);
{
/** TODO Move these tests to {@link ConstraintTest}.
*/
assertThat(solution.size()).isEqualTo(1);
assertThat(solution.demandsFree().size()).isEqualTo(1);
assertThat(solution.suppliesFree().size()).isEqualTo(2);
assertThat(solution.demandsUsed().size()).isEqualTo(1);
assertThat(solution.suppliesUsed().size()).isEqualTo(1);
}
assertThat(solution.isComplete()).isFalse();
assertThat(solution.constraint().rating().compare_partially_to(cost(defaultCost)).get())
.isEqualTo(EQUAL);
}
{
solution.remove(secondAllocation);
assertThat(solution.isComplete()).isFalse();
assertThat(solution.size()).isEqualTo(0);
assertThat(solution.constraint().rating().compare_partially_to(noCost()).get())
.isEqualTo(EQUAL);
}
}
}