1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 package com.google.protobuf;
33 import protobuf_unittest.UnittestProto.SparseEnumMessage;
34 import protobuf_unittest.UnittestProto.TestAllTypes;
35 import protobuf_unittest.UnittestProto.TestPackedTypes;
36 import protobuf_unittest.UnittestProto.TestSparseEnum;
38 import junit.framework.TestCase;
40 import java.io.ByteArrayOutputStream;
41 import java.nio.ByteBuffer;
42 import java.util.ArrayList;
43 import java.util.List;
46 * Unit test for {@link CodedOutputStream}.
48 * @author kenton@google.com Kenton Varda
50 public class CodedOutputStreamTest extends TestCase {
52 * Helper to construct a byte array from a bunch of bytes. The inputs are
53 * actually ints so that I can use hex notation and not get stupid errors
56 private byte[] bytes(int... bytesAsInts) {
57 byte[] bytes = new byte[bytesAsInts.length];
58 for (int i = 0; i < bytesAsInts.length; i++) {
59 bytes[i] = (byte) bytesAsInts[i];
64 /** Arrays.asList() does not work with arrays of primitives. :( */
65 private List<Byte> toList(byte[] bytes) {
66 List<Byte> result = new ArrayList<Byte>();
67 for (byte b : bytes) {
73 private void assertEqualBytes(byte[] a, byte[] b) {
74 assertEquals(toList(a), toList(b));
78 * Writes the given value using writeRawVarint32() and writeRawVarint64() and
79 * checks that the result matches the given bytes.
81 private void assertWriteVarint(byte[] data, long value) throws Exception {
82 // Only do 32-bit write if the value fits in 32 bits.
83 if ((value >>> 32) == 0) {
84 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
85 CodedOutputStream output = CodedOutputStream.newInstance(rawOutput);
86 output.writeRawVarint32((int) value);
88 assertEqualBytes(data, rawOutput.toByteArray());
90 // Also try computing size.
91 assertEquals(data.length,
92 CodedOutputStream.computeRawVarint32Size((int) value));
96 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
97 CodedOutputStream output = CodedOutputStream.newInstance(rawOutput);
98 output.writeRawVarint64(value);
100 assertEqualBytes(data, rawOutput.toByteArray());
102 // Also try computing size.
103 assertEquals(data.length,
104 CodedOutputStream.computeRawVarint64Size(value));
107 // Try different block sizes.
108 for (int blockSize = 1; blockSize <= 16; blockSize *= 2) {
109 // Only do 32-bit write if the value fits in 32 bits.
110 if ((value >>> 32) == 0) {
111 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
112 CodedOutputStream output =
113 CodedOutputStream.newInstance(rawOutput, blockSize);
114 output.writeRawVarint32((int) value);
116 assertEqualBytes(data, rawOutput.toByteArray());
120 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
121 CodedOutputStream output =
122 CodedOutputStream.newInstance(rawOutput, blockSize);
123 output.writeRawVarint64(value);
125 assertEqualBytes(data, rawOutput.toByteArray());
130 /** Tests writeRawVarint32() and writeRawVarint64(). */
131 public void testWriteVarint() throws Exception {
132 assertWriteVarint(bytes(0x00), 0);
133 assertWriteVarint(bytes(0x01), 1);
134 assertWriteVarint(bytes(0x7f), 127);
136 assertWriteVarint(bytes(0xa2, 0x74), (0x22 << 0) | (0x74 << 7));
138 assertWriteVarint(bytes(0xbe, 0xf7, 0x92, 0x84, 0x0b),
139 (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
144 assertWriteVarint(bytes(0xbe, 0xf7, 0x92, 0x84, 0x1b),
145 (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
149 bytes(0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49),
150 (0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) |
151 (0x43L << 28) | (0x49L << 35) | (0x24L << 42) | (0x49L << 49));
152 // 11964378330978735131
154 bytes(0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01),
155 (0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) |
156 (0x3bL << 28) | (0x56L << 35) | (0x00L << 42) |
157 (0x05L << 49) | (0x26L << 56) | (0x01L << 63));
161 * Parses the given bytes using writeRawLittleEndian32() and checks
162 * that the result matches the given value.
164 private void assertWriteLittleEndian32(byte[] data, int value)
166 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
167 CodedOutputStream output = CodedOutputStream.newInstance(rawOutput);
168 output.writeRawLittleEndian32(value);
170 assertEqualBytes(data, rawOutput.toByteArray());
172 // Try different block sizes.
173 for (int blockSize = 1; blockSize <= 16; blockSize *= 2) {
174 rawOutput = new ByteArrayOutputStream();
175 output = CodedOutputStream.newInstance(rawOutput, blockSize);
176 output.writeRawLittleEndian32(value);
178 assertEqualBytes(data, rawOutput.toByteArray());
183 * Parses the given bytes using writeRawLittleEndian64() and checks
184 * that the result matches the given value.
186 private void assertWriteLittleEndian64(byte[] data, long value)
188 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
189 CodedOutputStream output = CodedOutputStream.newInstance(rawOutput);
190 output.writeRawLittleEndian64(value);
192 assertEqualBytes(data, rawOutput.toByteArray());
194 // Try different block sizes.
195 for (int blockSize = 1; blockSize <= 16; blockSize *= 2) {
196 rawOutput = new ByteArrayOutputStream();
197 output = CodedOutputStream.newInstance(rawOutput, blockSize);
198 output.writeRawLittleEndian64(value);
200 assertEqualBytes(data, rawOutput.toByteArray());
204 /** Tests writeRawLittleEndian32() and writeRawLittleEndian64(). */
205 public void testWriteLittleEndian() throws Exception {
206 assertWriteLittleEndian32(bytes(0x78, 0x56, 0x34, 0x12), 0x12345678);
207 assertWriteLittleEndian32(bytes(0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef0);
209 assertWriteLittleEndian64(
210 bytes(0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12),
211 0x123456789abcdef0L);
212 assertWriteLittleEndian64(
213 bytes(0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a),
214 0x9abcdef012345678L);
217 /** Test encodeZigZag32() and encodeZigZag64(). */
218 public void testEncodeZigZag() throws Exception {
219 assertEquals(0, CodedOutputStream.encodeZigZag32( 0));
220 assertEquals(1, CodedOutputStream.encodeZigZag32(-1));
221 assertEquals(2, CodedOutputStream.encodeZigZag32( 1));
222 assertEquals(3, CodedOutputStream.encodeZigZag32(-2));
223 assertEquals(0x7FFFFFFE, CodedOutputStream.encodeZigZag32(0x3FFFFFFF));
224 assertEquals(0x7FFFFFFF, CodedOutputStream.encodeZigZag32(0xC0000000));
225 assertEquals(0xFFFFFFFE, CodedOutputStream.encodeZigZag32(0x7FFFFFFF));
226 assertEquals(0xFFFFFFFF, CodedOutputStream.encodeZigZag32(0x80000000));
228 assertEquals(0, CodedOutputStream.encodeZigZag64( 0));
229 assertEquals(1, CodedOutputStream.encodeZigZag64(-1));
230 assertEquals(2, CodedOutputStream.encodeZigZag64( 1));
231 assertEquals(3, CodedOutputStream.encodeZigZag64(-2));
232 assertEquals(0x000000007FFFFFFEL,
233 CodedOutputStream.encodeZigZag64(0x000000003FFFFFFFL));
234 assertEquals(0x000000007FFFFFFFL,
235 CodedOutputStream.encodeZigZag64(0xFFFFFFFFC0000000L));
236 assertEquals(0x00000000FFFFFFFEL,
237 CodedOutputStream.encodeZigZag64(0x000000007FFFFFFFL));
238 assertEquals(0x00000000FFFFFFFFL,
239 CodedOutputStream.encodeZigZag64(0xFFFFFFFF80000000L));
240 assertEquals(0xFFFFFFFFFFFFFFFEL,
241 CodedOutputStream.encodeZigZag64(0x7FFFFFFFFFFFFFFFL));
242 assertEquals(0xFFFFFFFFFFFFFFFFL,
243 CodedOutputStream.encodeZigZag64(0x8000000000000000L));
245 // Some easier-to-verify round-trip tests. The inputs (other than 0, 1, -1)
246 // were chosen semi-randomly via keyboard bashing.
248 CodedOutputStream.encodeZigZag32(CodedInputStream.decodeZigZag32(0)));
250 CodedOutputStream.encodeZigZag32(CodedInputStream.decodeZigZag32(1)));
252 CodedOutputStream.encodeZigZag32(CodedInputStream.decodeZigZag32(-1)));
254 CodedOutputStream.encodeZigZag32(CodedInputStream.decodeZigZag32(14927)));
256 CodedOutputStream.encodeZigZag32(CodedInputStream.decodeZigZag32(-3612)));
259 CodedOutputStream.encodeZigZag64(CodedInputStream.decodeZigZag64(0)));
261 CodedOutputStream.encodeZigZag64(CodedInputStream.decodeZigZag64(1)));
263 CodedOutputStream.encodeZigZag64(CodedInputStream.decodeZigZag64(-1)));
265 CodedOutputStream.encodeZigZag64(CodedInputStream.decodeZigZag64(14927)));
267 CodedOutputStream.encodeZigZag64(CodedInputStream.decodeZigZag64(-3612)));
269 assertEquals(856912304801416L,
270 CodedOutputStream.encodeZigZag64(
271 CodedInputStream.decodeZigZag64(
273 assertEquals(-75123905439571256L,
274 CodedOutputStream.encodeZigZag64(
275 CodedInputStream.decodeZigZag64(
276 -75123905439571256L)));
279 /** Tests writing a whole message with every field type. */
280 public void testWriteWholeMessage() throws Exception {
281 TestAllTypes message = TestUtil.getAllSet();
283 byte[] rawBytes = message.toByteArray();
284 assertEqualBytes(TestUtil.getGoldenMessage().toByteArray(), rawBytes);
286 // Try different block sizes.
287 for (int blockSize = 1; blockSize < 256; blockSize *= 2) {
288 ByteArrayOutputStream rawOutput = new ByteArrayOutputStream();
289 CodedOutputStream output =
290 CodedOutputStream.newInstance(rawOutput, blockSize);
291 message.writeTo(output);
293 assertEqualBytes(rawBytes, rawOutput.toByteArray());
297 /** Tests writing a whole message with every packed field type. Ensures the
298 * wire format of packed fields is compatible with C++. */
299 public void testWriteWholePackedFieldsMessage() throws Exception {
300 TestPackedTypes message = TestUtil.getPackedSet();
302 byte[] rawBytes = message.toByteArray();
303 assertEqualBytes(TestUtil.getGoldenPackedFieldsMessage().toByteArray(),
307 /** Test writing a message containing a negative enum value. This used to
308 * fail because the size was not properly computed as a sign-extended varint.
310 public void testWriteMessageWithNegativeEnumValue() throws Exception {
311 SparseEnumMessage message = SparseEnumMessage.newBuilder()
312 .setSparseEnum(TestSparseEnum.SPARSE_E) .build();
313 assertTrue(message.getSparseEnum().getNumber() < 0);
314 byte[] rawBytes = message.toByteArray();
315 SparseEnumMessage message2 = SparseEnumMessage.parseFrom(rawBytes);
316 assertEquals(TestSparseEnum.SPARSE_E, message2.getSparseEnum());
319 /** Test getTotalBytesWritten() */
320 public void testGetTotalBytesWritten() throws Exception {
321 final int BUFFER_SIZE = 4 * 1024;
322 ByteArrayOutputStream outputStream = new ByteArrayOutputStream(BUFFER_SIZE);
323 CodedOutputStream codedStream = CodedOutputStream.newInstance(outputStream);
324 byte[] value = "abcde".getBytes("UTF-8");
325 for (int i = 0; i < 1024; ++i) {
326 codedStream.writeRawBytes(value, 0, value.length);
328 // Make sure we have written more bytes than the buffer could hold. This is
329 // to make the test complete.
330 assertTrue(codedStream.getTotalBytesWritten() > BUFFER_SIZE);
331 assertEquals(value.length * 1024, codedStream.getTotalBytesWritten());
334 public void testWriteToByteBuffer() throws Exception {
335 final int bufferSize = 16 * 1024;
336 ByteBuffer buffer = ByteBuffer.allocate(bufferSize);
337 CodedOutputStream codedStream = CodedOutputStream.newInstance(buffer);
338 // Write raw bytes into the ByteBuffer.
339 final int length1 = 5000;
340 for (int i = 0; i < length1; i++) {
341 codedStream.writeRawByte((byte) 1);
343 final int length2 = 8 * 1024;
344 byte[] data = new byte[length2];
345 for (int i = 0; i < length2; i++) {
348 codedStream.writeRawBytes(data);
349 final int length3 = bufferSize - length1 - length2;
350 for (int i = 0; i < length3; i++) {
351 codedStream.writeRawByte((byte) 3);
355 // Check that data is correctly written to the ByteBuffer.
356 assertEquals(0, buffer.remaining());
358 for (int i = 0; i < length1; i++) {
359 assertEquals((byte) 1, buffer.get());
361 for (int i = 0; i < length2; i++) {
362 assertEquals((byte) 2, buffer.get());
364 for (int i = 0; i < length3; i++) {
365 assertEquals((byte) 3, buffer.get());
369 public void testWriteByteBuffer() throws Exception {
370 byte[] value = "abcde".getBytes("UTF-8");
371 ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
372 CodedOutputStream codedStream = CodedOutputStream.newInstance(outputStream);
373 ByteBuffer byteBuffer = ByteBuffer.wrap(value, 0, 1);
374 // This will actually write 5 bytes into the CodedOutputStream as the
375 // ByteBuffer's capacity() is 5.
376 codedStream.writeRawBytes(byteBuffer);
377 // The above call shouldn't affect the ByteBuffer's state.
378 assertEquals(0, byteBuffer.position());
379 assertEquals(1, byteBuffer.limit());
381 // The correct way to write part of an array using ByteBuffer.
382 codedStream.writeRawBytes(ByteBuffer.wrap(value, 2, 1).slice());
385 byte[] result = outputStream.toByteArray();
386 assertEquals(6, result.length);
387 for (int i = 0; i < 5; i++) {
388 assertEquals(value[i], result[i]);
390 assertEquals(value[2], result[5]);
393 public void testWriteByteArrayWithOffsets() throws Exception {
394 byte[] fullArray = bytes(0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88);
395 byte[] destination = new byte[4];
396 CodedOutputStream codedStream = CodedOutputStream.newInstance(destination);
397 codedStream.writeByteArrayNoTag(fullArray, 2, 2);
398 assertEqualBytes(bytes(0x02, 0x33, 0x44, 0x00), destination);
399 assertEquals(3, codedStream.getTotalBytesWritten());