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annotate test/org/tmatesoft/hg/test/TestTransaction.java @ 665:dde18bc7053b v1.2m1

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Test Copy-on-Write transactions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 10 Jul 2013 20:16:37 +0200
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dde18bc7053b Test Copy-on-Write transactions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
dde18bc7053b Test Copy-on-Write transactions
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dde18bc7053b Test Copy-on-Write transactions
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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14 * the terms of a license other than GNU General Public License
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.test;
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18
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19 import static org.junit.Assert.*;
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20
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21 import java.io.File;
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22 import java.io.FileReader;
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23 import java.io.IOException;
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24
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25 import org.junit.Rule;
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26 import org.junit.Test;
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27 import org.tmatesoft.hg.internal.BasicSessionContext;
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28 import org.tmatesoft.hg.internal.COWTransaction;
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29 import org.tmatesoft.hg.internal.Transaction;
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30
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31 /**
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32 * Check transaction rollback/commit as it's tricky to test transactions as part of pull/push commands
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33 *
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34 * @author Artem Tikhomirov
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35 * @author TMate Software Ltd.
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36 */
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37 public class TestTransaction {
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38
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39 @Rule
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40 public ErrorCollectorExt errorCollector = new ErrorCollectorExt();
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41
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42 @Test
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43 public void testCopyOnWriteTransaction() throws Exception {
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44 final BasicSessionContext ctx = new BasicSessionContext(null);
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45 Transaction.Factory f = new COWTransaction.Factory();
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46 File dir = RepoUtils.createEmptyDir("test-transaction-cow");
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47 File f1 = new File(dir, "f1");
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48 File f2 = new File(dir, "f2");
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49 File f3 = new File(dir, "f3");
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50 RepoUtils.createFile(f1, "1");
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51 assertTrue(f1.exists());
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52 assertFalse(f2.exists());
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53 assertFalse(f3.exists());
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54 //
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55 // transaction commit
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56 Transaction tr1 = f.create(ctx);
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57 File tf1 = tr1.prepare(f1);
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58 RepoUtils.modifyFileAppend(tf1, "2");
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59 tr1.done(tf1);
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60 File tf2 = tr1.prepare(f2);
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61 errorCollector.assertTrue(tf2.exists());
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62 RepoUtils.modifyFileAppend(tf2, "A");
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63 tr1.done(tf2);
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64 tr1.commit();
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65 errorCollector.assertTrue(f1.isFile());
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66 errorCollector.assertTrue(f2.isFile());
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67 errorCollector.assertEquals("12", read(f1));
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68 errorCollector.assertEquals("A", read(f2));
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69 //
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70 // transaction rollback
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71 assertFalse(f3.exists());
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72 Transaction tr2 = f.create(ctx);
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73 tf1 = tr2.prepare(f1);
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74 RepoUtils.modifyFileAppend(tf1, "3");
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75 tr2.done(tf1);
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76 errorCollector.assertEquals("123", read(tf1));
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77 tf2 = tr2.prepare(f2);
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78 RepoUtils.modifyFileAppend(tf2, "B");
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79 tr2.done(tf2);
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80 errorCollector.assertEquals("AB", read(tf2));
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81 File tf3 = tr2.prepare(f3);
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82 errorCollector.assertTrue(tf3.exists());
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83 RepoUtils.modifyFileAppend(tf3, "!");
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84 tr2.done(tf3);
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85 errorCollector.assertEquals("!", read(tf3));
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86 tr2.rollback();
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87 errorCollector.assertTrue(f1.isFile());
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88 errorCollector.assertTrue(f2.isFile());
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89 errorCollector.assertFalse(f3.isFile());
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90 errorCollector.assertEquals("12", read(f1));
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91 errorCollector.assertEquals("A", read(f2));
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92 }
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93
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94 String read(File f) throws IOException {
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95 StringBuilder sb = new StringBuilder();
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96 FileReader fr = new FileReader(f);
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97 int ch;
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98 while ((ch = fr.read()) != -1) {
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99 sb.append((char) ch);
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100 }
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101 fr.close();
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102 return sb.toString();
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103 }
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104 }