/**
* Copyright (c) 1999-2014, Ecole des Mines de Nantes
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Ecole des Mines de Nantes nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Created by IntelliJ IDEA.
* User: Jean-Guillaume Fages
* Date: 12/06/12
* Time: 21:29
*/
package solver.constraints.nary;
import org.testng.Assert;
import org.testng.annotations.Test;
import solver.Solver;
import solver.constraints.IntConstraintFactory;
import solver.variables.IntVar;
import solver.variables.VariableFactory;
import util.tools.ArrayUtils;
public class CircuitTest {
@Test(groups = "1s")
public static void test1() {
Solver solver = new Solver();
IntVar[] x = VariableFactory.boundedArray("x", 10, 0, 20, solver);
solver.post(IntConstraintFactory.circuit(x, 0));
solver.findSolution();
Assert.assertEquals(1, solver.getMeasures().getSolutionCount());
}
@Test(groups = "1s")
public static void test2() {
Solver solver = new Solver();
IntVar[] x = VariableFactory.enumeratedArray("x", 10, 0, 10, solver);
solver.post(IntConstraintFactory.circuit(x, 0));
solver.findSolution();
Assert.assertEquals(1, solver.getMeasures().getSolutionCount());
}
@Test(groups = "1s")
public static void test3() {
Solver solver = new Solver();
IntVar[] x = VariableFactory.boundedArray("x", 5, 0, 4, solver);
IntVar[] y = VariableFactory.boundedArray("y", 5, 5, 9, solver);
IntVar[] vars = ArrayUtils.append(x, y);
solver.post(IntConstraintFactory.circuit(vars, 0));
solver.findSolution();
Assert.assertEquals(0, solver.getMeasures().getSolutionCount());
}
@Test(groups = "1s")
public static void test4() {
for (int n = 2; n < 8; n++) {
Solver solver = new Solver();
IntVar[] x = VariableFactory.boundedArray("x", n, 0, n - 1, solver);
solver.post(IntConstraintFactory.circuit(x, 0));
solver.findAllSolutions();
Assert.assertEquals(factorial(n - 1), solver.getMeasures().getSolutionCount());
}
}
private static int factorial(int n) {
if (n == 1) {
return 1;
} else {
return n * factorial(n - 1);
}
}
}