1 /*
2 * Copyright 2009 Google, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24 /**
25 * @test
26 * @bug 4206909
27 * @summary Test basic functionality of DeflaterOutputStream and InflaterInputStream including flush
28 */
29
30 import java.io.*;
31 import java.util.*;
32 import java.util.zip.*;
33
34 public class InflateIn_DeflateOut {
35
36 private static class PairedInputStream extends ByteArrayInputStream {
37 private PairedOutputStream out = null;
38 private Random random;
39
40 public PairedInputStream() {
41 // The ByteArrayInputStream needs to start with a buffer, but we
42 // need to set it to have no data
43 super(new byte[1]);
44 count = 0;
45 pos = 0;
46 random = new Random(new Date().getTime());
47 }
48
49 public void setPairedOutputStream(PairedOutputStream out) {
50 this.out = out;
51 }
52
53 private void maybeFlushPair() {
54 if (random.nextInt(100) < 10) {
55 out.flush();
56 }
57 }
58
59 public int read() {
60 maybeFlushPair();
61 return super.read();
62 }
63
64 public int read(byte b[], int off, int len) {
65 maybeFlushPair();
66 return super.read(b, off, len);
67 }
68
69 public void addBytes(byte[] bytes, int len) {
70 int oldavail = count - pos;
71 int newcount = oldavail + len;
72 byte[] newbuf = new byte[newcount];
73 System.arraycopy(buf, pos, newbuf, 0, oldavail);
74 System.arraycopy(bytes, 0, newbuf, oldavail, len);
75 pos = 0;
76 count = newcount;
77 buf = newbuf;
78 }
79 }
80
81 private static class PairedOutputStream extends ByteArrayOutputStream {
82 private PairedInputStream pairedStream = null;
83
84 public PairedOutputStream(PairedInputStream inputPair) {
85 super();
86 this.pairedStream = inputPair;
87 }
88
89 public void flush() {
90 if (count > 0) {
91 pairedStream.addBytes(buf, count);
92 reset();
93 }
94 }
95
96 public void close() {
97 flush();
98 }
99 }
100
101 private static boolean readFully(InputStream in, byte[] buf, int length)
102 throws IOException {
103 int pos = 0;
104 int n;
105 while ((n = in.read(buf, pos, length - pos)) > 0) {
106 pos += n;
107 if (pos == length) return true;
108 }
109 return false;
110 }
111
112 private static boolean readLineIfAvailable(InputStream in, StringBuilder sb)
113 throws IOException {
114 try {
115 while (in.available() > 0) {
116 int i = in.read();
117 if (i < 0) break;
118 char c = (char) (((byte) i) & 0xff);
119 sb.append(c);
120 if (c == '\n') return true;
121 }
122 } catch (EOFException e) {
123 // empty
124 }
125 return false;
126 }
127
128 /** Check that written, closed and read */
129 private static void WriteCloseRead() throws Throwable {
130 Random random = new Random(new Date().getTime());
131
132 PairedInputStream pis = new PairedInputStream();
133 InflaterInputStream iis = new InflaterInputStream(pis);
134
135 PairedOutputStream pos = new PairedOutputStream(pis);
136 pis.setPairedOutputStream(pos);
137 DeflaterOutputStream dos = new DeflaterOutputStream(pos, true);
138
139 byte[] data = new byte[random.nextInt(1024 * 1024)];
140 byte[] buf = new byte[data.length];
141 random.nextBytes(data);
142
143 dos.write(data);
144 dos.close();
145 check(readFully(iis, buf, buf.length));
146 check(Arrays.equals(data, buf));
147 }
148
149 /** Check that written, flushed and read */
150 private static void WriteFlushRead() throws Throwable {
151 Random random = new Random(new Date().getTime());
152
153 PairedInputStream pis = new PairedInputStream();
154 InflaterInputStream iis = new InflaterInputStream(pis);
155
156 PairedOutputStream pos = new PairedOutputStream(pis);
157 pis.setPairedOutputStream(pos);
158 DeflaterOutputStream dos = new DeflaterOutputStream(pos, true);
159
160 // Large writes
161 for (int x = 0; x < 200 ; x++) {
162 // byte[] data = new byte[random.nextInt(1024 * 1024)];
163 byte[] data = new byte[1024];
164 byte[] buf = new byte[data.length];
165 random.nextBytes(data);
166
167 dos.write(data);
168 dos.flush();
169 check(readFully(iis, buf, buf.length));
170 check(Arrays.equals(data, buf));
171 }
172
173 // Small writes
174 for (int x = 0; x < 2000 ; x++) {
175 byte[] data = new byte[random.nextInt(20) + 10];
176 byte[] buf = new byte[data.length];
177 random.nextBytes(data);
178
179 dos.write(data);
180 dos.flush();
181 if (!readFully(iis, buf, buf.length)) {
182 fail("Didn't read full buffer of " + buf.length);
183 }
184 check(Arrays.equals(data, buf));
185 }
186
187 String quit = "QUIT\r\n";
188
189 // Close it out
190 dos.write(quit.getBytes());
191 dos.close();
192
193 StringBuilder sb = new StringBuilder();
194 check(readLineIfAvailable(iis, sb));
195 equal(sb.toString(), quit);
196 }
197
198 /** Validate that we need to use flush at least once on a line
199 * oriented protocol */
200 private static void LineOrientedProtocol() throws Throwable {
201 PairedInputStream pis = new PairedInputStream();
202 InflaterInputStream iis = new InflaterInputStream(pis);
203
204 PairedOutputStream pos = new PairedOutputStream(pis);
205 pis.setPairedOutputStream(pos);
206 DeflaterOutputStream dos = new DeflaterOutputStream(pos, true);
207
208 boolean flushed = false;
209 int count = 0;
210
211 // Do at least a certain number of lines, but too many without a
212 // flush means this test isn't testing anything
213 while ((count < 10 && flushed) || (count < 1000 && !flushed)) {
214 String command = "PING " + count + "\r\n";
215 dos.write(command.getBytes());
216
217 StringBuilder buf = new StringBuilder();
218 if (!readLineIfAvailable(iis, buf)) {
219 flushed = true;
220 dos.flush();
221 check(readLineIfAvailable(iis, buf));
222 }
223 equal(buf.toString(), command);
224 count++;
225 }
226 check(flushed);
227 }
228
229 public static void realMain(String[] args) throws Throwable {
230 WriteCloseRead();
231
232 WriteFlushRead();
233
234 LineOrientedProtocol();
235 }
236
237 //--------------------- Infrastructure ---------------------------
238 static volatile int passed = 0, failed = 0;
239 static void pass() {passed++;}
240 static void fail() {failed++; Thread.dumpStack();}
241 static void fail(String msg) {System.out.println(msg); fail();}
242 static void unexpected(Throwable t) {failed++; t.printStackTrace();}
243 static void check(boolean cond) {if (cond) pass(); else fail();}
244 static void equal(Object x, Object y) {
245 if (x == null ? y == null : x.equals(y)) pass();
246 else fail(x + " not equal to " + y);}
247 public static void main(String[] args) throws Throwable {
248 try {realMain(args);} catch (Throwable t) {unexpected(t);}
249 System.out.println("\nPassed = " + passed + " failed = " + failed);
250 if (failed > 0) throw new AssertionError("Some tests failed");}
251 }