content: /**
   * Copyright (c) 2017 Siemens AG
   * All rights reserved.
   * 
   * 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,
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   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  package at.ac.tuwien.kr.alpha.core.solver;
  
  import static at.ac.tuwien.kr.alpha.core.programs.atoms.Literals.atomOf;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.Collection;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import at.ac.tuwien.kr.alpha.api.config.SystemConfig;
  import at.ac.tuwien.kr.alpha.api.programs.ASPCore2Program;
  import at.ac.tuwien.kr.alpha.core.common.AtomStore;
  import at.ac.tuwien.kr.alpha.core.common.AtomStoreImpl;
  import at.ac.tuwien.kr.alpha.core.common.NoGood;
  import at.ac.tuwien.kr.alpha.core.grounder.Grounder;
  import at.ac.tuwien.kr.alpha.core.grounder.NaiveGrounder;
  import at.ac.tuwien.kr.alpha.core.parser.ProgramParserImpl;
  import at.ac.tuwien.kr.alpha.core.programs.CompiledProgram;
  import at.ac.tuwien.kr.alpha.core.programs.InternalProgram;
  import at.ac.tuwien.kr.alpha.core.programs.atoms.RuleAtom;
  import at.ac.tuwien.kr.alpha.core.programs.transformation.NormalizeProgramTransformation;
  
  public class ChoiceManagerTests {
  	private Grounder grounder;
  	private ChoiceManager choiceManager;
  	private AtomStore atomStore;
  
  	@BeforeEach
  	public void setUp() {
  		String testProgram = "h :- b1, b2, not b3, not b4.";
  		ASPCore2Program parsedProgram = new ProgramParserImpl().parse(testProgram);
  		CompiledProgram internalProgram = InternalProgram.fromNormalProgram(new NormalizeProgramTransformation(SystemConfig.DEFAULT_AGGREGATE_REWRITING_CONFIG).apply(parsedProgram));
  		atomStore = new AtomStoreImpl();
  		grounder = new NaiveGrounder(internalProgram, atomStore, true);
  		WritableAssignment assignment = new TrailAssignment(atomStore);
  		NoGoodStore store = new NoGoodStoreAlphaRoaming(assignment);
  		choiceManager = new ChoiceManager(assignment, store);
  	}
  
  	@Test
  	public void testIsAtomChoice() {
  		Collection<NoGood> noGoods = getNoGoods();
  		choiceManager.addChoiceInformation(grounder.getChoiceAtoms(), grounder.getHeadsToBodies());
  		for (NoGood noGood : noGoods) {
  			for (Integer literal : noGood) {
  				int atom = atomOf(literal);
  				String atomToString = atomStore.atomToString(atom);
  				if (atomToString.startsWith(RuleAtom.PREDICATE.getName())) {
  					assertTrue(choiceManager.isAtomChoice(atom), "Atom not choice: " + atomToString);
  				}
  			}
  		}
  	}
  
  	private Collection<NoGood> getNoGoods() {
  		return grounder.getNoGoods(null).values();
  	}
  }
  