1 package net.sourceforge.pmd.lang.cpp;
2
3 import static org.junit.Assert.assertEquals;
4
5 import java.io.IOException;
6 import java.io.StringReader;
7
8 import org.junit.Test;
9
10 public class ContinuationReaderTest {
11 @Test
12 public void testHappyPath() throws IOException {
13 assertEquals("empty", "", filter(""));
14 assertEquals("anything", "anything", filter("anything"));
15
16 assertEquals("partial: BS", "\\", filter("\\"));
17 assertEquals("partial: BS LF", "\\\r", filter("\\\r"));
18 assertEquals("full: BS CR", "", filter("\\\n"));
19 assertEquals("full: BS LF CR", "", filter("\\\r\n"));
20
21 assertEquals("partial: BS: prefix", "prefix\\", filter("prefix\\"));
22 assertEquals("partial: BS LF: prefix", "prefix\\\r", filter("prefix\\\r"));
23 assertEquals("full: BS CR: prefix", "prefix", filter("prefix\\\n"));
24 assertEquals("full: BS LF CR: prefix", "prefix", filter("prefix\\\r\n"));
25
26 assertEquals("partial: BS: suffix", "\\suffix", filter("\\suffix"));
27 assertEquals("partial: BS LF: suffix", "\\\rsuffix", filter("\\\rsuffix"));
28 assertEquals("full: BS CR: suffix", "suffix", filter("\\\nsuffix"));
29 assertEquals("full: BS LF CR: suffix", "suffix", filter("\\\r\nsuffix"));
30
31 assertEquals("partial: BS: prefix, suffix", "prefix\\suffix", filter("prefix\\suffix"));
32 assertEquals("partial: BS LF: prefix, suffix", "prefix\\\rsuffix", filter("prefix\\\rsuffix"));
33 assertEquals("full: BS CR: prefix, suffix", "prefixsuffix", filter("prefix\\\nsuffix"));
34 assertEquals("full: BS LF CR: prefix, suffix", "prefixsuffix", filter("prefix\\\r\nsuffix"));
35
36 assertEquals("complex mixed", "abc", filter("a\\\r\nb\\\n\\\n\\\r\nc"));
37 }
38
39 private static String filter(String s) throws IOException {
40 ContinuationReader reader = new ContinuationReader(new StringReader(s));
41 try {
42 StringBuilder buf = new StringBuilder();
43 int c;
44 while ((c = reader.read()) >= 0) {
45 buf.append((char) c);
46 }
47 return buf.toString();
48 } finally {
49 reader.close();
50 }
51 }
52 }