Subversion Repositories splitter

/*
 * Copyright (C) 2008 Steve Ratcliffe
 *
 *  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: Steve Ratcliffe
 * Create date: 10-Jan-2009
 */
package func.lib;

import static org.junit.Assert.assertTrue;

import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.List;

import uk.me.parabola.splitter.Main;

/**
 * Useful routines to use during the functional tests.
 *
 * @author Steve Ratcliffe
 * @author Gerd Petermann
 */
public class TestUtils {
        private static final List<String> files = new ArrayList<>();
        private static final Deque<Closeable> open = new ArrayDeque<>();

        static {
                files.add(Args.DEF_AREAS_KML);
                files.add(Args.DEF_AREAS_LIST);
                files.add(Args.DEF_AREAS_POLY);
                files.add(Args.DEF_PROBLEM_LIST);
                files.add(Args.DEF_DENSITIES);
                files.add(Args.DEF_TEMPLATE);

                Runnable r = new Runnable() {
                        public void run() {
                                deleteOutputFiles();
                        }
                };
                Thread t = new Thread(r);
                Runtime.getRuntime().addShutdownHook(t);
        }

        /**
         * Delete output files that were created by the tests.
         * Used to clean up before/after a test.
         */
        public static void deleteOutputFiles() {
                for (String fname : files) {
                        File f = new File(fname);

                        if (f.exists())
                                assertTrue("delete existing file: " + f.getName(), f.delete());
                }
        }

        public static void closeFiles() {
                while (!open.isEmpty()) {
                        try {
                                open.remove().close();
                        } catch (IOException e) {
                                e.printStackTrace();
                        }
                }
        }

        public static void registerFile(String ... names) {
                Collections.addAll(files, names);
        }

        public static void registerFile(Closeable... fileList) {
                Collections.addAll(open, fileList);
        }

        /**
         * Run with a single argument.  The standard arguments are added first.
         * @param arg The argument.
         */
        public static Outputs run(String arg) {
                return run(new String[] {arg});
        }

        /**
         * Run with the given args.  Some standard arguments are added first.
         *
         * To run without the standard args, use runRaw().
         * @param in The arguments to use.
         */
        public static Outputs run(String ... in) {
                List<String> args = new ArrayList<>(Arrays.asList(in));

                OutputStream outsink = new ByteArrayOutputStream();
                PrintStream out = new PrintStream(outsink);

                OutputStream errsink = new ByteArrayOutputStream();
                PrintStream err = new PrintStream(errsink);

                PrintStream origout = System.out;
                PrintStream origerr = System.err;

                try {
                        System.setOut(out);
                        System.setErr(err);
                        Main.mainNoSystemExit(args.toArray(new String[args.size()]));
                } finally {
                        out.close();
                        err.close();
                        System.setOut(origout);
                        System.setErr(origerr);
                }

                return new Outputs(outsink.toString(), errsink.toString());
        }

}