AntlrTestHelper.java

/*
 * Copyright (C) 2011 Laurent Caillette
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.novelang.parser.antlr;

import junit.framework.AssertionFailedError;

import org.novelang.common.Problem;


/**
 * Lots of {@code ParserMethod} instances and some utility methods.
 *
 * @author Laurent Caillette
 */
public class AntlrTestHelper {

  static final String BREAK = "\n" ;

  private AntlrTestHelper() {}


  /*package*/ static void checkSanity( final AbstractDelegatingParser parser ) {
    if( parser.hasProblem() ) {
      throw new AssertionFailedError(
          "Parser has problems. " + createProblemList( parser.getProblems() ) ) ;
    }
  }


  /*package*/ static DelegatingPartParser createPartParser( final String text ) {
    return new DelegatingPartParser( text, TreeFixture.LOCATION_FACTORY ) ;
  }


  public static String createProblemList( final Iterable< Problem > problems ) {
    final StringBuilder buffer = new StringBuilder( "Problems:" );
    for( final Problem problem : problems ) {
      buffer.append( "\n    " ) ;
      buffer.append( problem.getMessage() ) ;
      buffer.append( "  at  " ) ;
      buffer.append( problem.getLocation() ) ;
    }
    return buffer.toString() ;
  }

}