Package com.lastcalc.engines

Source Code of com.lastcalc.engines.CombinedParserPickerFactoryTest

/*******************************************************************************
* LastCalc - The last calculator you'll ever need
* Copyright (C) 2011, 2012 Uprizer Labs LLC
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Affero 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 Affero General Public License for more
* details.
******************************************************************************/
package com.lastcalc.engines;

import com.google.common.collect.Lists;

import org.junit.*;

import com.lastcalc.TokenList;
import com.lastcalc.parsers.*;


public class CombinedParserPickerFactoryTest {

  @Test
  public void test() {
    final Parser p1 = new RewriteParser(Lists.newArrayList("1", "1"), "one");
    final Parser p2 = new RewriteParser(Lists.newArrayList("2", "2"), "two");
    final Parser p3 = new RewriteParser(Lists.newArrayList("3", "3"), "three");
    final Parser p4 = new RewriteParser(Lists.newArrayList("4", "4"), "four");

    final FixedOrderParserPickerFactory f1 = new FixedOrderParserPickerFactory(p1, p2);
    final FixedOrderParserPickerFactory f2 = new FixedOrderParserPickerFactory(p3, p4);
    final CombinedParserPickerFactory f = new CombinedParserPickerFactory(f1, f2);

    final BacktrackingParseEngine pe = new BacktrackingParseEngine(f);

    final ParserContext context = new ParserContext(pe, Long.MAX_VALUE);
    final TokenList result = pe.parseAndGetLastStep(new TokenList.SimpleTokenList("1", "1", "2", "2", "3", "3",
        "4", "4"),
        context);

    Assert.assertEquals(TokenList.createD("one", "two", "three", "four"), result);
  }

}
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