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12 package org.eclipse.jgit.util.io;
13
14 import static java.nio.charset.StandardCharsets.UTF_8;
15
16 import java.io.ByteArrayInputStream;
17 import java.io.ByteArrayOutputStream;
18 import java.io.IOException;
19 import java.io.InputStream;
20 import java.io.OutputStream;
21
22 import org.junit.Assert;
23 import org.junit.Test;
24
25 public class AutoCRLFOutputStreamTest {
26
27 @Test
28 public void test() throws IOException {
29 assertNoCrLf("", "");
30 assertNoCrLf("\r", "\r");
31 assertNoCrLf("\r\n", "\n");
32 assertNoCrLf("\r\n", "\r\n");
33 assertNoCrLf("\r\r", "\r\r");
34 assertNoCrLf("\r\n\r", "\n\r");
35 assertNoCrLf("\r\n\r\r", "\r\n\r\r");
36 assertNoCrLf("\r\n\r\n", "\r\n\r\n");
37 assertNoCrLf("\r\n\r\n\r", "\n\r\n\r");
38 assertNoCrLf("\0\n", "\0\n");
39 }
40
41 @Test
42 public void testBoundary() throws IOException {
43 for (int i = AutoCRLFOutputStream.BUFFER_SIZE - 10; i < AutoCRLFOutputStream.BUFFER_SIZE + 10; i++) {
44 String s1 = Strings.repeat("a", i);
45 assertNoCrLf(s1, s1);
46 String s2 = Strings.repeat("\0", i);
47 assertNoCrLf(s2, s2);
48 }
49 }
50
51 private void assertNoCrLf(String string, String string2) throws IOException {
52 assertNoCrLfHelper(string, string2);
53
54
55 assertNoCrLfHelper("\u00e5" + string, "\u00e5" + string2);
56 assertNoCrLfHelper("\u00e5" + string + "\u00e5", "\u00e5" + string2
57 + "\u00e5");
58 assertNoCrLfHelper(string + "\u00e5", string2 + "\u00e5");
59 }
60
61 private void assertNoCrLfHelper(String expect, String input)
62 throws IOException {
63 byte[] inbytes = input.getBytes(UTF_8);
64 byte[] expectBytes = expect.getBytes(UTF_8);
65 for (int i = -4; i < 5; ++i) {
66 int size = Math.abs(i);
67 byte[] buf = new byte[size];
68 try (InputStream in = new ByteArrayInputStream(inbytes);
69 ByteArrayOutputStream bos = new ByteArrayOutputStream();
70 OutputStream out = new AutoCRLFOutputStream(bos)) {
71 if (i > 0) {
72 int n;
73 while ((n = in.read(buf)) >= 0) {
74 out.write(buf, 0, n);
75 }
76 } else if (i < 0) {
77 int n;
78 while ((n = in.read(buf)) >= 0) {
79 byte[] b = new byte[n];
80 System.arraycopy(buf, 0, b, 0, n);
81 out.write(b);
82 }
83 } else {
84 int c;
85 while ((c = in.read()) != -1)
86 out.write(c);
87 }
88 out.flush();
89 byte[] actualBytes = bos.toByteArray();
90 Assert.assertEquals("bufsize=" + size, encode(expectBytes),
91 encode(actualBytes));
92 }
93 }
94 }
95
96 String encode(byte[] in) {
97 StringBuilder str = new StringBuilder();
98 for (byte b : in) {
99 if (b < 32)
100 str.append(0xFF & b);
101 else {
102 str.append("'");
103 str.append((char) b);
104 str.append("'");
105 }
106 str.append(' ');
107 }
108 return str.toString();
109 }
110
111 }