content: /**
   * Copyright (c) 2016-2018, the Alpha Team.
   * All rights reserved.
   *
   * Additional changes made by Siemens.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1) Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2) 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.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER OR 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 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package at.ac.tuwien.kr.alpha.core.grounder;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.util.List;
  
  import org.junit.jupiter.api.Test;
  
  import at.ac.tuwien.kr.alpha.api.programs.terms.ConstantTerm;
  import at.ac.tuwien.kr.alpha.commons.Predicates;
  import at.ac.tuwien.kr.alpha.commons.programs.terms.Terms;
  import at.ac.tuwien.kr.alpha.commons.substitutions.Instance;
  
  /**
   * Copyright (c) 2016, the Alpha Team.
   */
  public class IndexedInstanceStorageTest {
  	@Test
  	public void testIndexedInstanceStorage() {
  		IndexedInstanceStorage storage = new IndexedInstanceStorage(Predicates.getPredicate("p", 4), true);
  		storage.addIndexPosition(0);
  		storage.addIndexPosition(2);
  		ConstantTerm<String> t0 = Terms.newConstant("0");
  		ConstantTerm<String> t1 = Terms.newConstant("1");
  		ConstantTerm<String> t2 = Terms.newConstant("2");
  		ConstantTerm<String> t3 = Terms.newConstant("3");
  		ConstantTerm<String> t4 = Terms.newConstant("4");
  		ConstantTerm<String> t5 = Terms.newConstant("5");
  
  		Instance badInst1 = new Instance(t1, t1, t0);
  		Instance badInst2 = new Instance(t5, t5, t5, t5, t5);
  
  		try {
  			storage.addInstance(badInst1);
  			fail();
  		} catch (Exception e) {
  			assertTrue(e.getMessage().startsWith("Instance length does not match arity of IndexedInstanceStorage"));
  		}
  
  		try {
  			storage.addInstance(badInst2);
  			fail();
  		} catch (Exception e) {
  			assertTrue(e.getMessage().startsWith("Instance length does not match arity of IndexedInstanceStorage"));
  		}
  
  		Instance inst1 = new Instance(t1, t1, t1, t1);
  		Instance inst2 = new Instance(t1, t2, t3, t4);
  		Instance inst3 = new Instance(t4, t3, t3, t5);
  		Instance inst4 = new Instance(t1, t2, t1, t1);
  		Instance inst5 = new Instance(t5, t4, t3, t2);
  
  		storage.addInstance(inst1);
  		storage.addInstance(inst2);
  		storage.addInstance(inst3);
  		storage.addInstance(inst4);
  		storage.addInstance(inst5);
  
  		List<Instance> matching3 = storage.getInstancesMatchingAtPosition(t3, 2);
  		assertEquals(matching3.size(), 3);
  		assertTrue(matching3.contains(new Instance(t1, t2, t3, t4)));
  		assertTrue(matching3.contains(new Instance(t4, t3, t3, t5)));
  		assertTrue(matching3.contains(new Instance(t5, t4, t3, t2)));
  		assertFalse(matching3.contains(new Instance(t1, t1, t1, t1)));
  
  		List<Instance> matching1 = storage.getInstancesMatchingAtPosition(t2, 0);
  		assertEquals(matching1.size(), 0);
  	}
  
  }
  