RoundRobinTournamentTest.java

/*
 * Copyright 2015 S. Webber
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.oakgp.rank.tournament;

import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;
import static org.oakgp.TestUtils.assertRankedCandidate;
import static org.oakgp.TestUtils.integerConstant;

import java.util.Arrays;
import java.util.List;

import org.junit.Test;
import org.oakgp.node.Node;
import org.oakgp.rank.GenerationRanker;
import org.oakgp.rank.RankedCandidates;

public class RoundRobinTournamentTest {
   @Test
   public void test() {
      // test data
      Node a = integerConstant(1);
      Node b = integerConstant(2);
      Node c = integerConstant(3);
      List<Node> input = Arrays.asList(a, b, c);

      // mock
      TwoPlayerGame mockGame = mock(TwoPlayerGame.class);
      given(mockGame.evaluate(a, b)).willReturn(5d);
      given(mockGame.evaluate(a, c)).willReturn(-3d);
      given(mockGame.evaluate(b, c)).willReturn(2d);

      // invoke rank method
      GenerationRanker tournament = new RoundRobinTournament(mockGame);
      RankedCandidates output = tournament.rank(input);

      // assert output
      assertRankedCandidate(output.get(0), a, 2);
      assertRankedCandidate(output.get(1), c, 1);
      assertRankedCandidate(output.get(2), b, -3);
   }
}