src/test/java/net/pterodactylus/xdcc/util/io/DuplicateLineSuppressingWriterTest.java

   1 /*
   2  * XdccDownloader - DuplicateLineSuppressingWriterTest.java - Copyright © 2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.xdcc.util.io;
  19
  20 import static org.hamcrest.MatcherAssert.assertThat;
  21 import static org.hamcrest.Matchers.is;
  22
  23 import java.io.IOException;
  24 import java.io.StringWriter;
  25
  26 import org.junit.Test;
  27
  28 /**
  29  * Unit test for {@link DuplicateLineSuppressingWriter}.
  30  *
  31  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  32  */
  33 public class DuplicateLineSuppressingWriterTest {
  34
  35         private final StringWriter stringWriter = new StringWriter();
  36         private final DuplicateLineSuppressingWriter duplicateLineSuppressingWriter = new DuplicateLineSuppressingWriter(stringWriter);
  37
  38         @Test
  39         public void theFirstLineIsWrittenImmediately() throws IOException {
  40                 duplicateLineSuppressingWriter.write("First Line.\n");
  41                 assertThat(stringWriter.toString(), is("First Line.\n"));
  42         }
  43
  44         @Test
  45         public void twoDifferentLinesAreWrittenOut() throws IOException {
  46                 duplicateLineSuppressingWriter.write("First Line.\n");
  47                 duplicateLineSuppressingWriter.write("Second Line.\n");
  48                 assertThat(stringWriter.toString(), is("First Line.\nSecond Line.\n"));
  49         }
  50
  51         @Test
  52         public void twoEqualLinesAreOnlyWrittenOnce() throws IOException {
  53                 duplicateLineSuppressingWriter.write("First Line.\n");
  54                 duplicateLineSuppressingWriter.write("First Line.\n");
  55                 assertThat(stringWriter.toString(), is("First Line.\n"));
  56         }
  57
  58         @Test
  59         public void multipleLinesAreSuppressed() throws IOException {
  60                 duplicateLineSuppressingWriter.write("First Line.\n");
  61                 duplicateLineSuppressingWriter.write("Second Line.\n");
  62                 duplicateLineSuppressingWriter.write("Second Line.\n");
  63                 duplicateLineSuppressingWriter.write("Second Line.\n");
  64                 duplicateLineSuppressingWriter.write("First Line.\n");
  65                 duplicateLineSuppressingWriter.write("First Line.\n");
  66                 assertThat(stringWriter.toString(), is("First Line.\nSecond Line.\nFirst Line.\n"));
  67         }
  68
  69         @Test
  70         public void resettingTheWriterAllowsADuplicateLine() throws IOException {
  71                 duplicateLineSuppressingWriter.write("First Line.\n");
  72                 duplicateLineSuppressingWriter.write("Second Line.\n");
  73                 duplicateLineSuppressingWriter.reset();
  74                 duplicateLineSuppressingWriter.write("Second Line.\n");
  75                 assertThat(stringWriter.toString(), is("First Line.\nSecond Line.\nSecond Line.\n"));
  76         }
  77
  78 }