59 lines
1.8 KiB
Java
59 lines
1.8 KiB
Java
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// Copyright 2010-2018 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import com.google.ortools.sat.CpModel;
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import com.google.ortools.sat.CpSolver;
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import com.google.ortools.sat.CpSolverStatus;
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import com.google.ortools.sat.IntVar;
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import static org.junit.Assert.*;
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/** Tests the CP-SAT java interface. */
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public class TestSat {
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static {
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System.loadLibrary("jniortools");
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}
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static void testCrashInPresolve() {
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CpModel model = new CpModel();
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// Create decision variables
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IntVar x = model.newIntVar(0, 5, "x");
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IntVar y = model.newIntVar(0, 5, "y");
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// Create a linear constraint which enforces that only x or y can be greater
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// than 0.
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model.addLinearSum(new IntVar[] { x, y }, 0, 1);
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// Create the objective variable
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IntVar obj = model.newIntVar(0, 3, "obj");
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// Cut the domain of the objective variable
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model.addGreaterOrEqual(obj, 2);
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// Set a constraint that makes the problem infeasible
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model.addMaxEquality(obj, new IntVar[] { x, y });
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// Optimize objective
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model.minimize(obj);
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// Create a solver and solve the model.
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CpSolver solver = new CpSolver();
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com.google.ortools.sat.CpSolverStatus status = solver.solve(model);
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assertEquals(status, CpSolverStatus.FEASIBLE);
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}
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public static void main(String[] args) throws Exception {
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testCrashInPresolve();
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}
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}
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