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package solver.constraints.ternary;
import org.testng.Assert;
import org.testng.annotations.Test;
import solver.Solver;
import solver.constraints.Constraint;
import solver.constraints.IntConstraintFactory;
import solver.exception.ContradictionException;
import solver.variables.IntVar;
import solver.variables.VariableFactory;
/**
* <br/>
*
* @author Charles Prud'homme
* @since 16/07/12
*/
public class ModTest extends AbstractTernaryTest {
@Override
protected int validTuple(int vx, int vy, int vz) {
return (vy != 0 && vz == vx - vy * (vx / vy)) ? 1 : 0;
}
@Override
protected Constraint make(IntVar[] vars, Solver s) {
return IntConstraintFactory.mod(vars[0], vars[1], vars[2]);
}
@Test(groups = "1s")
public void test2() {
Solver solver = new Solver();
IntVar res = VariableFactory.bounded("r", 1, 2, solver);
solver.post(IntConstraintFactory.mod(res, VariableFactory.fixed(2, solver), VariableFactory.fixed(1, solver)));
try {
solver.propagate();
Assert.assertTrue(res.isInstantiatedTo(1));
} catch (ContradictionException e) {
Assert.fail();
}
}
}