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/*
 * Copyright (C)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  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.
 *
 *
 * Author: Gerd Petermann
 * Create date: 2017-01-10
 */

package func;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.junit.Test;

import func.lib.Args;
import uk.me.parabola.splitter.Main;


/**
 * Compare file sizes with expected results. A very basic check that the size of
 * the output files has not changed. This can be used to make sure that a change
 * that is not expected to change the output does not do so.
 *
 * The sizes will have to be always changed when the output does change though.
 *
 *
 * @author Gerd Petermann
 */

public class SolverAndProblemGeneratorTest extends Base {
       
        /**
         * @throws IOException
         */

        @Test
        public void testHamburg() throws IOException {
                runSplitter(Args.expectedHamburg, "--stop-after=gen-problem-list", Args.HAMBURG);
        }

        @Test
        public void testAlaska() throws IOException {
                runSplitter(Args.expectedAlaska,"--stop-after=gen-problem-list", Args.ALASKA);
        }

        @Test
        /** verifies that --max-areas has no effect on the output */
        public void testAlaskaMaxAreas7() throws IOException {
                runSplitter(Args.expectedAlaska,"--stop-after=gen-problem-list","--max-areas=5", Args.ALASKA);
        }


        private static void runSplitter(Map<String, Integer> expected, String... optArgs) throws IOException {
                List<String> argsList = new ArrayList<>(Arrays.asList(Args.MAIN_ARGS));
                for (String arg : optArgs)
                        argsList.add(arg);
               
                Main.mainNoSystemExit(argsList.toArray(new String[argsList.size()]));
               
                for (Entry<String, Integer> entry : expected.entrySet()) {
                        String f = entry.getKey();
                        long expectedSize = entry.getValue();
                        assertTrue("no " + f + " generated", new File(f).exists());
                        List<String> lines = Files.readAllLines(Paths.get(f, ""));
                        long realSize = 0;
                        for (String l : lines) {
                                realSize += l.length();
                        }
                        assertEquals(f + " has wrong size", expectedSize, realSize);
                }
        }

        @Test
        public void testNoSuchFile() {
                Main.mainNoSystemExit("no-such-file-xyz.osm");
                assertFalse("no file generated", new File(Args.DEF_AREAS_LIST).exists());
        }

}