View Javadoc
1   ///////////////////////////////////////////////////////////////////////////////////////////////
2   // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3   // Copyright (C) 2001-2024 the original author or authors.
4   //
5   // This library is free software; you can redistribute it and/or
6   // modify it under the terms of the GNU Lesser General Public
7   // License as published by the Free Software Foundation; either
8   // version 2.1 of the License, or (at your option) any later version.
9   //
10  // This library is distributed in the hope that it will be useful,
11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  // Lesser General Public License for more details.
14  //
15  // You should have received a copy of the GNU Lesser General Public
16  // License along with this library; if not, write to the Free Software
17  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  ///////////////////////////////////////////////////////////////////////////////////////////////
19  
20  package com.puppycrawl.tools.checkstyle.grammar;
21  
22  import static com.google.common.truth.Truth.assertWithMessage;
23  
24  import org.antlr.v4.runtime.CharStream;
25  import org.antlr.v4.runtime.CharStreams;
26  import org.junit.jupiter.api.Test;
27  
28  public class CrAwareLexerTest {
29  
30      @Test
31      public void testConsumeCarriageReturnZeroCharPositionInLine() {
32          final String text = "\r";
33          final CharStream charStream = CharStreams.fromString(text);
34          final CrAwareLexerSimulator lexer =
35                  new CrAwareLexerSimulator(null, null, null, null);
36          lexer.consume(charStream);
37  
38          assertWithMessage("Carriage return should reset column number.")
39                  .that(lexer.getCharPositionInLine())
40                  .isEqualTo(0);
41      }
42  
43      @Test
44      public void testConsumeCarriageReturnNewline() {
45          final String text = "\r";
46          final CharStream charStream = CharStreams.fromString(text);
47          final CrAwareLexerSimulator lexer =
48                  new CrAwareLexerSimulator(null, null, null, null);
49          lexer.consume(charStream);
50  
51          assertWithMessage("Carriage return should increment line number.")
52                  .that(lexer.getLine())
53                  .isEqualTo(2);
54      }
55  
56      @Test
57      public void testConsumeWindowsNewlineZeroCharPositionInLine() {
58          final String text = "\r\n";
59          final CharStream charStream = CharStreams.fromString(text);
60          final CrAwareLexerSimulator lexer =
61                  new CrAwareLexerSimulator(null, null, null, null);
62          lexer.consume(charStream);
63          lexer.consume(charStream);
64  
65          assertWithMessage("Carriage return should reset column number.")
66                  .that(lexer.getCharPositionInLine())
67                  .isEqualTo(0);
68      }
69  
70      @Test
71      public void testConsumeWindowsNewline() {
72          final String text = "\r\n";
73          final CharStream charStream = CharStreams.fromString(text);
74          final CrAwareLexerSimulator lexer =
75                  new CrAwareLexerSimulator(null, null, null, null);
76          lexer.consume(charStream);
77          lexer.consume(charStream);
78  
79          assertWithMessage("Carriage return should increment line number.")
80                  .that(lexer.getLine())
81                  .isEqualTo(2);
82      }
83  }