openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 1 | // Copyright 2008 Google Inc. |
| 2 | // Author: Lincoln Smith |
| 3 | // |
| 4 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | // you may not use this file except in compliance with the License. |
| 6 | // You may obtain a copy of the License at |
| 7 | // |
| 8 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | // |
| 10 | // Unless required by applicable law or agreed to in writing, software |
| 11 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | // See the License for the specific language governing permissions and |
| 14 | // limitations under the License. |
| 15 | |
| 16 | #include <config.h> |
| 17 | #include "google/vcdecoder.h" |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 18 | #include <stdlib.h> // free, posix_memalign |
| 19 | #include <string.h> // memcpy |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 20 | #include <string> |
| 21 | #include "testing.h" |
| 22 | #include "varint_bigendian.h" |
| 23 | #include "vcdecoder_test.h" |
| 24 | #include "vcdiff_defs.h" // VCD_SOURCE |
| 25 | |
| 26 | #ifdef HAVE_MALLOC_H |
| 27 | #include <malloc.h> |
| 28 | #endif // HAVE_MALLOC_H |
| 29 | |
| 30 | #ifdef HAVE_SYS_MMAN_H |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 31 | #if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600 |
| 32 | #undef _XOPEN_SOURCE |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 33 | #define _XOPEN_SOURCE 600 // posix_memalign |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 34 | #endif |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 35 | #include <sys/mman.h> // mprotect |
| 36 | #endif // HAVE_SYS_MMAN_H |
| 37 | |
| 38 | #ifdef HAVE_UNISTD_H |
| 39 | #include <unistd.h> // getpagesize |
| 40 | #endif // HAVE_UNISTD_H |
| 41 | |
| 42 | namespace open_vcdiff { |
| 43 | |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 44 | // Test headers, valid and invalid. |
| 45 | |
| 46 | TEST_F(VCDiffInterleavedDecoderTest, DecodeHeaderOnly) { |
| 47 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 48 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_header_.data(), |
| 49 | delta_file_header_.size(), |
| 50 | &output_)); |
| 51 | EXPECT_TRUE(decoder_.FinishDecoding()); |
| 52 | EXPECT_EQ("", output_); |
| 53 | } |
| 54 | |
| 55 | TEST_F(VCDiffInterleavedDecoderTest, PartialHeaderNotEnough) { |
| 56 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 57 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_header_.data(), |
| 58 | delta_file_header_.size() - 2, |
| 59 | &output_)); |
| 60 | EXPECT_FALSE(decoder_.FinishDecoding()); |
| 61 | EXPECT_EQ("", output_); |
| 62 | } |
| 63 | |
| 64 | TEST_F(VCDiffInterleavedDecoderTest, BadMagicNumber) { |
| 65 | delta_file_[1] = 'Q' | 0x80; |
| 66 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 67 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 68 | delta_file_.size(), |
| 69 | &output_)); |
| 70 | EXPECT_EQ("", output_); |
| 71 | } |
| 72 | |
| 73 | TEST_F(VCDiffInterleavedDecoderTest, BadVersionNumber) { |
| 74 | delta_file_[3] = 0x01; |
| 75 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 76 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 77 | delta_file_.size(), |
| 78 | &output_)); |
| 79 | EXPECT_EQ("", output_); |
| 80 | } |
| 81 | |
| 82 | TEST_F(VCDiffInterleavedDecoderTest, SecondaryCompressionNotSupported) { |
| 83 | delta_file_[4] = 0x01; |
| 84 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 85 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 86 | delta_file_.size(), |
| 87 | &output_)); |
| 88 | EXPECT_EQ("", output_); |
| 89 | } |
| 90 | |
| 91 | TEST_F(VCDiffInterleavedDecoderTest, Decode) { |
| 92 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 93 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 94 | delta_file_.size(), |
| 95 | &output_)); |
| 96 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 97 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | TEST_F(VCDiffInterleavedDecoderTest, DecodeWithChecksum) { |
| 101 | ComputeAndAddChecksum(); |
| 102 | InitializeDeltaFile(); |
| 103 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 104 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 105 | delta_file_.size(), |
| 106 | &output_)); |
| 107 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 108 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | TEST_F(VCDiffInterleavedDecoderTest, ChecksumDoesNotMatch) { |
| 112 | AddChecksum(0xBADBAD); |
| 113 | InitializeDeltaFile(); |
| 114 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 115 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 116 | delta_file_.size(), |
| 117 | &output_)); |
| 118 | EXPECT_EQ("", output_); |
| 119 | } |
| 120 | |
| 121 | TEST_F(VCDiffInterleavedDecoderTest, ChecksumIsInvalid64BitVarint) { |
| 122 | static const char kInvalidVarint[] = { 0x81, 0x80, 0x80, 0x80, 0x80, 0x80, |
| 123 | 0x80, 0x80, 0x80, 0x00 }; |
| 124 | delta_window_header_[0] |= VCD_CHECKSUM; |
| 125 | delta_window_header_.append(kInvalidVarint, sizeof(kInvalidVarint)); |
| 126 | // Adjust delta window size to include size of invalid Varint. |
| 127 | string size_of_invalid_varint; |
| 128 | VarintBE<int32_t>::AppendToString( |
| 129 | static_cast<int32_t>(delta_window_header_[4] + sizeof(kInvalidVarint)), |
| 130 | &size_of_invalid_varint); |
| 131 | delta_window_header_.replace(4, 1, size_of_invalid_varint); |
| 132 | InitializeDeltaFile(); |
| 133 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 134 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 135 | delta_file_.size(), |
| 136 | &output_)); |
| 137 | EXPECT_EQ("", output_); |
| 138 | } |
| 139 | |
| 140 | // Remove one byte from the length of the chunk to process, and |
| 141 | // verify that an error is returned for FinishDecoding(). |
| 142 | TEST_F(VCDiffInterleavedDecoderTest, FinishAfterDecodingPartialWindow) { |
| 143 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 144 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 145 | delta_file_.size() - 1, |
| 146 | &output_)); |
| 147 | EXPECT_FALSE(decoder_.FinishDecoding()); |
| 148 | // The decoder should not create more target bytes than were expected. |
| 149 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 150 | } |
| 151 | |
| 152 | TEST_F(VCDiffInterleavedDecoderTest, FinishAfterDecodingPartialWindowHeader) { |
| 153 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 154 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 155 | delta_file_header_.size() |
| 156 | + delta_window_header_.size() - 1, |
| 157 | &output_)); |
| 158 | EXPECT_FALSE(decoder_.FinishDecoding()); |
| 159 | // The decoder should not create more target bytes than were expected. |
| 160 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 161 | } |
| 162 | |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 163 | TEST_F(VCDiffInterleavedDecoderTest, TargetMatchesWindowSizeLimit) { |
| 164 | decoder_.SetMaximumTargetWindowSize(expected_target_.size()); |
| 165 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 166 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 167 | delta_file_.size(), |
| 168 | &output_)); |
| 169 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 170 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | TEST_F(VCDiffInterleavedDecoderTest, TargetMatchesFileSizeLimit) { |
| 174 | decoder_.SetMaximumTargetFileSize(expected_target_.size()); |
| 175 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 176 | EXPECT_TRUE(decoder_.DecodeChunk(delta_file_.data(), |
| 177 | delta_file_.size(), |
| 178 | &output_)); |
| 179 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 180 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | TEST_F(VCDiffInterleavedDecoderTest, TargetExceedsWindowSizeLimit) { |
| 184 | decoder_.SetMaximumTargetWindowSize(expected_target_.size() - 1); |
| 185 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 186 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 187 | delta_file_.size(), |
| 188 | &output_)); |
| 189 | EXPECT_EQ("", output_); |
| 190 | } |
| 191 | |
| 192 | TEST_F(VCDiffInterleavedDecoderTest, TargetExceedsFileSizeLimit) { |
| 193 | decoder_.SetMaximumTargetFileSize(expected_target_.size() - 1); |
| 194 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 195 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 196 | delta_file_.size(), |
| 197 | &output_)); |
| 198 | EXPECT_EQ("", output_); |
| 199 | } |
| 200 | |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 201 | // Fuzz bits to make sure decoder does not violently crash. |
| 202 | // This test has no expected behavior except that no crashes should occur. |
| 203 | // In some cases, changing bits will still decode to the correct target; |
| 204 | // for example, changing unused bits within a bitfield. |
| 205 | TEST_F(VCDiffInterleavedDecoderTest, FuzzBits) { |
| 206 | while (FuzzOneByteInDeltaFile()) { |
| 207 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 208 | if (decoder_.DecodeChunk(delta_file_.data(), |
| 209 | delta_file_.size(), |
| 210 | &output_)) { |
| 211 | decoder_.FinishDecoding(); |
| 212 | } |
| 213 | InitializeDeltaFile(); |
| 214 | output_.clear(); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | // If a checksum is present, then fuzzing any of the bits may produce an error, |
| 219 | // but it should not result in an incorrect target being produced without |
| 220 | // an error. |
| 221 | TEST_F(VCDiffInterleavedDecoderTest, FuzzBitsWithChecksum) { |
| 222 | ComputeAndAddChecksum(); |
| 223 | InitializeDeltaFile(); |
| 224 | while (FuzzOneByteInDeltaFile()) { |
| 225 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 226 | if (decoder_.DecodeChunk(delta_file_.data(), |
| 227 | delta_file_.size(), |
| 228 | &output_)) { |
| 229 | if (decoder_.FinishDecoding()) { |
| 230 | // Decoding succeeded. Make sure the correct target was produced. |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 231 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 232 | } |
| 233 | } else { |
| 234 | EXPECT_EQ("", output_); |
| 235 | } |
| 236 | InitializeDeltaFile(); |
| 237 | output_.clear(); |
| 238 | } |
| 239 | } |
| 240 | |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 241 | TEST_F(VCDiffInterleavedDecoderTest, CopyMoreThanExpectedTarget) { |
| 242 | delta_file_[delta_file_header_.size() + 0x0C] = |
| 243 | FirstByteOfStringLength(kExpectedTarget); |
| 244 | delta_file_[delta_file_header_.size() + 0x0D] = |
| 245 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 246 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 247 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 248 | delta_file_.size(), |
| 249 | &output_)); |
| 250 | EXPECT_EQ("", output_); |
| 251 | } |
| 252 | |
| 253 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeZero) { |
| 254 | delta_file_[delta_file_header_.size() + 0x0C] = 0; |
| 255 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 256 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 257 | delta_file_.size(), |
| 258 | &output_)); |
| 259 | EXPECT_EQ("", output_); |
| 260 | } |
| 261 | |
| 262 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeTooLargeByOne) { |
| 263 | ++delta_file_[delta_file_header_.size() + 0x0C]; |
| 264 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 265 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 266 | delta_file_.size(), |
| 267 | &output_)); |
| 268 | EXPECT_EQ("", output_); |
| 269 | } |
| 270 | |
| 271 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeTooSmallByOne) { |
| 272 | --delta_file_[delta_file_header_.size() + 0x0C]; |
| 273 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 274 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 275 | delta_file_.size(), |
| 276 | &output_)); |
| 277 | EXPECT_EQ("", output_); |
| 278 | } |
| 279 | |
| 280 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeMaxInt) { |
| 281 | WriteMaxVarintAtOffset(0x0C, 1); |
| 282 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 283 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 284 | delta_file_.size(), |
| 285 | &output_)); |
| 286 | EXPECT_EQ("", output_); |
| 287 | } |
| 288 | |
| 289 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeNegative) { |
| 290 | WriteNegativeVarintAtOffset(0x0C, 1); |
| 291 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 292 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 293 | delta_file_.size(), |
| 294 | &output_)); |
| 295 | EXPECT_EQ("", output_); |
| 296 | } |
| 297 | |
| 298 | TEST_F(VCDiffInterleavedDecoderTest, CopySizeInvalid) { |
| 299 | WriteInvalidVarintAtOffset(0x0C, 1); |
| 300 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 301 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 302 | delta_file_.size(), |
| 303 | &output_)); |
| 304 | EXPECT_EQ("", output_); |
| 305 | } |
| 306 | |
| 307 | TEST_F(VCDiffInterleavedDecoderTest, CopyAddressBeyondHereAddress) { |
| 308 | delta_file_[delta_file_header_.size() + 0x0D] = |
| 309 | FirstByteOfStringLength(kDictionary); |
| 310 | delta_file_[delta_file_header_.size() + 0x0E] = |
| 311 | SecondByteOfStringLength(kDictionary); |
| 312 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 313 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 314 | delta_file_.size(), |
| 315 | &output_)); |
| 316 | EXPECT_EQ("", output_); |
| 317 | } |
| 318 | |
| 319 | TEST_F(VCDiffInterleavedDecoderTest, CopyAddressMaxInt) { |
| 320 | WriteMaxVarintAtOffset(0x0D, 1); |
| 321 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 322 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 323 | delta_file_.size(), |
| 324 | &output_)); |
| 325 | EXPECT_EQ("", output_); |
| 326 | } |
| 327 | |
| 328 | TEST_F(VCDiffInterleavedDecoderTest, CopyAddressNegative) { |
| 329 | WriteNegativeVarintAtOffset(0x0D, 1); |
| 330 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 331 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 332 | delta_file_.size(), |
| 333 | &output_)); |
| 334 | EXPECT_EQ("", output_); |
| 335 | } |
| 336 | |
| 337 | TEST_F(VCDiffInterleavedDecoderTest, CopyAddressInvalid) { |
| 338 | WriteInvalidVarintAtOffset(0x0D, 1); |
| 339 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 340 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 341 | delta_file_.size(), |
| 342 | &output_)); |
| 343 | EXPECT_EQ("", output_); |
| 344 | } |
| 345 | |
| 346 | TEST_F(VCDiffInterleavedDecoderTest, AddMoreThanExpectedTarget) { |
| 347 | delta_file_[delta_file_header_.size() + 0x0F] = |
| 348 | FirstByteOfStringLength(kExpectedTarget); |
| 349 | delta_file_[delta_file_header_.size() + 0x10] = |
| 350 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 351 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 352 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 353 | delta_file_.size(), |
| 354 | &output_)); |
| 355 | EXPECT_EQ("", output_); |
| 356 | } |
| 357 | |
| 358 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeZero) { |
| 359 | delta_file_[delta_file_header_.size() + 0x0F] = 0; |
| 360 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 361 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 362 | delta_file_.size(), |
| 363 | &output_)); |
| 364 | EXPECT_EQ("", output_); |
| 365 | } |
| 366 | |
| 367 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeTooLargeByOne) { |
| 368 | ++delta_file_[delta_file_header_.size() + 0x0F]; |
| 369 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 370 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 371 | delta_file_.size(), |
| 372 | &output_)); |
| 373 | EXPECT_EQ("", output_); |
| 374 | } |
| 375 | |
| 376 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeTooSmallByOne) { |
| 377 | --delta_file_[delta_file_header_.size() + 0x0F]; |
| 378 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 379 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 380 | delta_file_.size(), |
| 381 | &output_)); |
| 382 | EXPECT_EQ("", output_); |
| 383 | } |
| 384 | |
| 385 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeMaxInt) { |
| 386 | WriteMaxVarintAtOffset(0x0F, 1); |
| 387 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 388 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 389 | delta_file_.size(), |
| 390 | &output_)); |
| 391 | EXPECT_EQ("", output_); |
| 392 | } |
| 393 | |
| 394 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeNegative) { |
| 395 | WriteNegativeVarintAtOffset(0x0F, 1); |
| 396 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 397 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 398 | delta_file_.size(), |
| 399 | &output_)); |
| 400 | EXPECT_EQ("", output_); |
| 401 | } |
| 402 | |
| 403 | TEST_F(VCDiffInterleavedDecoderTest, AddSizeInvalid) { |
| 404 | WriteInvalidVarintAtOffset(0x0F, 1); |
| 405 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 406 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 407 | delta_file_.size(), |
| 408 | &output_)); |
| 409 | EXPECT_EQ("", output_); |
| 410 | } |
| 411 | |
| 412 | TEST_F(VCDiffInterleavedDecoderTest, RunMoreThanExpectedTarget) { |
| 413 | delta_file_[delta_file_header_.size() + 0x5F] = |
| 414 | FirstByteOfStringLength(kExpectedTarget); |
| 415 | delta_file_[delta_file_header_.size() + 0x60] = |
| 416 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 417 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 418 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 419 | delta_file_.size(), |
| 420 | &output_)); |
| 421 | EXPECT_EQ("", output_); |
| 422 | } |
| 423 | |
| 424 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeZero) { |
| 425 | delta_file_[delta_file_header_.size() + 0x5F] = 0; |
| 426 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 427 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 428 | delta_file_.size(), |
| 429 | &output_)); |
| 430 | EXPECT_EQ("", output_); |
| 431 | } |
| 432 | |
| 433 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeTooLargeByOne) { |
| 434 | ++delta_file_[delta_file_header_.size() + 0x5F]; |
| 435 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 436 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 437 | delta_file_.size(), |
| 438 | &output_)); |
| 439 | EXPECT_EQ("", output_); |
| 440 | } |
| 441 | |
| 442 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeTooSmallByOne) { |
| 443 | --delta_file_[delta_file_header_.size() + 0x5F]; |
| 444 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 445 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 446 | delta_file_.size(), |
| 447 | &output_)); |
| 448 | EXPECT_EQ("", output_); |
| 449 | } |
| 450 | |
| 451 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeMaxInt) { |
| 452 | WriteMaxVarintAtOffset(0x5F, 1); |
| 453 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 454 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 455 | delta_file_.size(), |
| 456 | &output_)); |
| 457 | EXPECT_EQ("", output_); |
| 458 | } |
| 459 | |
| 460 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeNegative) { |
| 461 | WriteNegativeVarintAtOffset(0x5F, 1); |
| 462 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 463 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 464 | delta_file_.size(), |
| 465 | &output_)); |
| 466 | EXPECT_EQ("", output_); |
| 467 | } |
| 468 | |
| 469 | TEST_F(VCDiffInterleavedDecoderTest, RunSizeInvalid) { |
| 470 | WriteInvalidVarintAtOffset(0x5F, 1); |
| 471 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 472 | EXPECT_FALSE(decoder_.DecodeChunk(delta_file_.data(), |
| 473 | delta_file_.size(), |
| 474 | &output_)); |
| 475 | EXPECT_EQ("", output_); |
| 476 | } |
| 477 | |
| 478 | #if defined(HAVE_MPROTECT) && \ |
| 479 | (defined(HAVE_MEMALIGN) || defined(HAVE_POSIX_MEMALIGN)) |
| 480 | TEST_F(VCDiffInterleavedDecoderTest, ShouldNotReadPastEndOfBuffer) { |
| 481 | // Allocate two memory pages. |
| 482 | const int page_size = getpagesize(); |
| 483 | void* two_pages = NULL; |
| 484 | #ifdef HAVE_POSIX_MEMALIGN |
| 485 | posix_memalign(&two_pages, page_size, 2 * page_size); |
| 486 | #else // !HAVE_POSIX_MEMALIGN |
| 487 | two_pages = memalign(page_size, 2 * page_size); |
| 488 | #endif // HAVE_POSIX_MEMALIGN |
| 489 | char* const first_page = reinterpret_cast<char*>(two_pages); |
| 490 | char* const second_page = first_page + page_size; |
| 491 | |
| 492 | // Place the delta string at the end of the first page. |
| 493 | char* delta_with_guard = second_page - delta_file_.size(); |
| 494 | memcpy(delta_with_guard, delta_file_.data(), delta_file_.size()); |
| 495 | |
| 496 | // Make the second page unreadable. |
| 497 | mprotect(second_page, page_size, PROT_NONE); |
| 498 | |
| 499 | // Now perform the decode operation, which will cause a segmentation fault |
| 500 | // if it reads past the end of the buffer. |
| 501 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 502 | EXPECT_TRUE(decoder_.DecodeChunk(delta_with_guard, |
| 503 | delta_file_.size(), |
| 504 | &output_)); |
| 505 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 506 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 507 | |
| 508 | // Undo the mprotect. |
| 509 | mprotect(second_page, page_size, PROT_READ|PROT_WRITE); |
| 510 | free(two_pages); |
| 511 | } |
| 512 | |
| 513 | TEST_F(VCDiffInterleavedDecoderTest, ShouldNotReadPastBeginningOfBuffer) { |
| 514 | // Allocate two memory pages. |
| 515 | const int page_size = getpagesize(); |
| 516 | void* two_pages = NULL; |
| 517 | #ifdef HAVE_POSIX_MEMALIGN |
| 518 | posix_memalign(&two_pages, page_size, 2 * page_size); |
| 519 | #else // !HAVE_POSIX_MEMALIGN |
| 520 | two_pages = memalign(page_size, 2 * page_size); |
| 521 | #endif // HAVE_POSIX_MEMALIGN |
| 522 | char* const first_page = reinterpret_cast<char*>(two_pages); |
| 523 | char* const second_page = first_page + page_size; |
| 524 | |
| 525 | // Make the first page unreadable. |
| 526 | mprotect(first_page, page_size, PROT_NONE); |
| 527 | |
| 528 | // Place the delta string at the beginning of the second page. |
| 529 | char* delta_with_guard = second_page; |
| 530 | memcpy(delta_with_guard, delta_file_.data(), delta_file_.size()); |
| 531 | |
| 532 | // Now perform the decode operation, which will cause a segmentation fault |
| 533 | // if it reads past the beginning of the buffer. |
| 534 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 535 | EXPECT_TRUE(decoder_.DecodeChunk(delta_with_guard, |
| 536 | delta_file_.size(), |
| 537 | &output_)); |
| 538 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 539 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 540 | |
| 541 | // Undo the mprotect. |
| 542 | mprotect(first_page, page_size, PROT_READ|PROT_WRITE); |
| 543 | free(two_pages); |
| 544 | } |
| 545 | #endif // HAVE_MPROTECT && (HAVE_MEMALIGN || HAVE_POSIX_MEMALIGN) |
| 546 | |
| 547 | // These are the same tests as for VCDiffInterleavedDecoderTest, with the added |
| 548 | // complication that instead of calling DecodeChunk() once with the entire data |
| 549 | // set, DecodeChunk() is called once for each byte of input. This is intended |
| 550 | // to shake out any bugs with rewind and resume while parsing chunked data. |
| 551 | |
| 552 | typedef VCDiffInterleavedDecoderTest VCDiffInterleavedDecoderTestByteByByte; |
| 553 | |
| 554 | // Test headers, valid and invalid. |
| 555 | |
| 556 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, DecodeHeaderOnly) { |
| 557 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 558 | for (size_t i = 0; i < delta_file_header_.size(); ++i) { |
| 559 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_header_[i], 1, &output_)); |
| 560 | } |
| 561 | EXPECT_TRUE(decoder_.FinishDecoding()); |
| 562 | EXPECT_EQ("", output_); |
| 563 | } |
| 564 | |
| 565 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, PartialHeaderNotEnough) { |
| 566 | delta_file_.resize(delta_file_header_.size() - 2); |
| 567 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 568 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 569 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_[i], 1, &output_)); |
| 570 | } |
| 571 | EXPECT_FALSE(decoder_.FinishDecoding()); |
| 572 | EXPECT_EQ("", output_); |
| 573 | } |
| 574 | |
| 575 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, BadMagicNumber) { |
| 576 | delta_file_[1] = 'Q' | 0x80; |
| 577 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 578 | bool failed = false; |
| 579 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 580 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 581 | // It should fail at the position that was altered |
| 582 | EXPECT_EQ(1U, i); |
| 583 | failed = true; |
| 584 | break; |
| 585 | } |
| 586 | } |
| 587 | EXPECT_TRUE(failed); |
| 588 | EXPECT_EQ("", output_); |
| 589 | } |
| 590 | |
| 591 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, BadVersionNumber) { |
| 592 | delta_file_[3] = 0x01; |
| 593 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 594 | bool failed = false; |
| 595 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 596 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 597 | failed = true; |
| 598 | // It should fail at the position that was altered |
| 599 | EXPECT_EQ(3U, i); |
| 600 | break; |
| 601 | } |
| 602 | } |
| 603 | EXPECT_TRUE(failed); |
| 604 | EXPECT_EQ("", output_); |
| 605 | } |
| 606 | |
| 607 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, |
| 608 | SecondaryCompressionNotSupported) { |
| 609 | delta_file_[4] = 0x01; |
| 610 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 611 | bool failed = false; |
| 612 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 613 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 614 | failed = true; |
| 615 | // It should fail at the position that was altered |
| 616 | EXPECT_EQ(4U, i); |
| 617 | break; |
| 618 | } |
| 619 | } |
| 620 | EXPECT_TRUE(failed); |
| 621 | EXPECT_EQ("", output_); |
| 622 | } |
| 623 | |
| 624 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, Decode) { |
| 625 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 626 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 627 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_[i], 1, &output_)); |
| 628 | } |
| 629 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 630 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, DecodeWithChecksum) { |
| 634 | ComputeAndAddChecksum(); |
| 635 | InitializeDeltaFile(); |
| 636 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 637 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 638 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_[i], 1, &output_)); |
| 639 | } |
| 640 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 641 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, ChecksumDoesNotMatch) { |
| 645 | AddChecksum(0xBADBAD); |
| 646 | InitializeDeltaFile(); |
| 647 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 648 | bool failed = false; |
| 649 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 650 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 651 | failed = true; |
| 652 | // It should fail after decoding the entire delta file |
| 653 | EXPECT_EQ(delta_file_.size() - 1, i); |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | EXPECT_TRUE(failed); |
| 658 | // The decoder should not create more target bytes than were expected. |
| 659 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 660 | } |
| 661 | |
| 662 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, ChecksumIsInvalid64BitVarint) { |
| 663 | static const char kInvalidVarint[] = { 0x81, 0x80, 0x80, 0x80, 0x80, 0x80, |
| 664 | 0x80, 0x80, 0x80, 0x00 }; |
| 665 | delta_window_header_[0] |= VCD_CHECKSUM; |
| 666 | delta_window_header_.append(kInvalidVarint, sizeof(kInvalidVarint)); |
| 667 | // Adjust delta window size to include size of invalid Varint. |
| 668 | string size_of_invalid_varint; |
| 669 | VarintBE<int32_t>::AppendToString( |
| 670 | static_cast<int32_t>(delta_window_header_[4] + sizeof(kInvalidVarint)), |
| 671 | &size_of_invalid_varint); |
| 672 | delta_window_header_.replace(4, 1, size_of_invalid_varint); |
| 673 | InitializeDeltaFile(); |
| 674 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 675 | bool failed = false; |
| 676 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 677 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 678 | failed = true; |
| 679 | // It should fail while trying to interpret the checksum. |
| 680 | EXPECT_EQ(delta_file_header_.size() + delta_window_header_.size() - 2, i); |
| 681 | break; |
| 682 | } |
| 683 | } |
| 684 | EXPECT_TRUE(failed); |
| 685 | // The decoder should not create more target bytes than were expected. |
| 686 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 687 | } |
| 688 | |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 689 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, TargetMatchesWindowSizeLimit) { |
| 690 | decoder_.SetMaximumTargetWindowSize(expected_target_.size()); |
| 691 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 692 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 693 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_[i], 1, &output_)); |
| 694 | } |
| 695 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 696 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, TargetMatchesFileSizeLimit) { |
| 700 | decoder_.SetMaximumTargetFileSize(expected_target_.size()); |
| 701 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 702 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 703 | EXPECT_TRUE(decoder_.DecodeChunk(&delta_file_[i], 1, &output_)); |
| 704 | } |
| 705 | EXPECT_TRUE(decoder_.FinishDecoding()); |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 706 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 28db807 | 2008-10-10 23:29:11 +0000 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, TargetExceedsWindowSizeLimit) { |
| 710 | decoder_.SetMaximumTargetWindowSize(expected_target_.size() - 1); |
| 711 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 712 | bool failed = false; |
| 713 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 714 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 715 | failed = true; |
| 716 | break; |
| 717 | } |
| 718 | } |
| 719 | EXPECT_TRUE(failed); |
| 720 | EXPECT_EQ("", output_); |
| 721 | } |
| 722 | |
| 723 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, TargetExceedsFileSizeLimit) { |
| 724 | decoder_.SetMaximumTargetFileSize(expected_target_.size() - 1); |
| 725 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 726 | bool failed = false; |
| 727 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 728 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 729 | failed = true; |
| 730 | break; |
| 731 | } |
| 732 | } |
| 733 | EXPECT_TRUE(failed); |
| 734 | EXPECT_EQ("", output_); |
| 735 | } |
| 736 | |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 737 | // Fuzz bits to make sure decoder does not violently crash. |
| 738 | // This test has no expected behavior except that no crashes should occur. |
| 739 | // In some cases, changing bits will still decode to the correct target; |
| 740 | // for example, changing unused bits within a bitfield. |
| 741 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, FuzzBits) { |
| 742 | while (FuzzOneByteInDeltaFile()) { |
| 743 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 744 | bool failed = false; |
| 745 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 746 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 747 | failed = true; |
| 748 | break; |
| 749 | } |
| 750 | } |
| 751 | if (!failed) { |
| 752 | decoder_.FinishDecoding(); |
| 753 | } |
| 754 | InitializeDeltaFile(); |
| 755 | output_.clear(); |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | // If a checksum is present, then fuzzing any of the bits may produce an error, |
| 760 | // but it should not result in an incorrect target being produced without |
| 761 | // an error. |
| 762 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, FuzzBitsWithChecksum) { |
| 763 | ComputeAndAddChecksum(); |
| 764 | InitializeDeltaFile(); |
| 765 | while (FuzzOneByteInDeltaFile()) { |
| 766 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 767 | bool failed = false; |
| 768 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 769 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 770 | failed = true; |
| 771 | break; |
| 772 | } |
| 773 | } |
| 774 | if (!failed) { |
| 775 | if (decoder_.FinishDecoding()) { |
| 776 | // Decoding succeeded. Make sure the correct target was produced. |
openvcdiff@gmail.com | 732fff2 | 2010-08-04 18:00:00 +0000 | [diff] [blame] | 777 | EXPECT_EQ(expected_target_.c_str(), output_); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 778 | } |
| 779 | } |
| 780 | // The decoder should not create more target bytes than were expected. |
| 781 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 782 | InitializeDeltaFile(); |
| 783 | output_.clear(); |
| 784 | } |
| 785 | } |
| 786 | |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 787 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, |
| 788 | CopyInstructionsShouldFailIfNoSourceSegment) { |
| 789 | // Replace the Win_Indicator and the source size and source offset with a |
| 790 | // single 0 byte (a Win_Indicator for a window with no source segment.) |
| 791 | delta_window_header_.replace(0, 4, "\0", 1); |
| 792 | InitializeDeltaFile(); |
| 793 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 794 | bool failed = false; |
| 795 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 796 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 797 | failed = true; |
| 798 | // The first COPY instruction should fail. |
| 799 | EXPECT_EQ(delta_file_header_.size() + delta_window_header_.size() + 2, i); |
| 800 | break; |
| 801 | } |
| 802 | } |
| 803 | EXPECT_TRUE(failed); |
| 804 | EXPECT_EQ("", output_); |
| 805 | } |
| 806 | |
| 807 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopyMoreThanExpectedTarget) { |
| 808 | delta_file_[delta_file_header_.size() + 0x0C] = |
| 809 | FirstByteOfStringLength(kExpectedTarget); |
| 810 | delta_file_[delta_file_header_.size() + 0x0D] = |
| 811 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 812 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 813 | bool failed = false; |
| 814 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 815 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 816 | failed = true; |
| 817 | // It should fail at the position that was altered |
| 818 | EXPECT_EQ(delta_file_header_.size() + 0x0D, i); |
| 819 | break; |
| 820 | } |
| 821 | } |
| 822 | EXPECT_TRUE(failed); |
| 823 | // The decoder should not create more target bytes than were expected. |
| 824 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 825 | } |
| 826 | |
| 827 | // A COPY instruction with an explicit size of 0 is not illegal according to the |
| 828 | // standard, although it is inefficient and should not be generated by any |
| 829 | // reasonable encoder. Changing the size of a COPY instruction to zero will |
| 830 | // cause a failure because the generated target window size will not match the |
| 831 | // expected target size. |
| 832 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeZero) { |
| 833 | delta_file_[delta_file_header_.size() + 0x0C] = 0; |
| 834 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 835 | bool failed = false; |
| 836 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 837 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 838 | failed = true; |
| 839 | break; |
| 840 | } |
| 841 | } |
| 842 | EXPECT_TRUE(failed); |
| 843 | // The decoder should not create more target bytes than were expected. |
| 844 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 845 | } |
| 846 | |
| 847 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeTooLargeByOne) { |
| 848 | ++delta_file_[delta_file_header_.size() + 0x0C]; |
| 849 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 850 | bool failed = false; |
| 851 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 852 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 853 | failed = true; |
| 854 | break; |
| 855 | } |
| 856 | } |
| 857 | EXPECT_TRUE(failed); |
| 858 | // The decoder should not create more target bytes than were expected. |
| 859 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 860 | } |
| 861 | |
| 862 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeTooSmallByOne) { |
| 863 | --delta_file_[delta_file_header_.size() + 0x0C]; |
| 864 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 865 | bool failed = false; |
| 866 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 867 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 868 | failed = true; |
| 869 | break; |
| 870 | } |
| 871 | } |
| 872 | EXPECT_TRUE(failed); |
| 873 | // The decoder should not create more target bytes than were expected. |
| 874 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 875 | } |
| 876 | |
| 877 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeMaxInt) { |
| 878 | WriteMaxVarintAtOffset(0x0C, 1); |
| 879 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 880 | bool failed = false; |
| 881 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 882 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 883 | failed = true; |
| 884 | // It should fail at the position that was altered |
| 885 | EXPECT_EQ(delta_file_header_.size() + 0x10, i); |
| 886 | break; |
| 887 | } |
| 888 | } |
| 889 | EXPECT_TRUE(failed); |
| 890 | // The decoder should not create more target bytes than were expected. |
| 891 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 892 | } |
| 893 | |
| 894 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeNegative) { |
| 895 | WriteNegativeVarintAtOffset(0x0C, 1); |
| 896 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 897 | bool failed = false; |
| 898 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 899 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 900 | failed = true; |
| 901 | // It should fail at the position that was altered |
openvcdiff@gmail.com | f1dd933 | 2009-10-09 22:40:32 +0000 | [diff] [blame] | 902 | EXPECT_EQ(delta_file_header_.size() + 0x0F, i); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 903 | break; |
| 904 | } |
| 905 | } |
| 906 | EXPECT_TRUE(failed); |
| 907 | // The decoder should not create more target bytes than were expected. |
| 908 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 909 | } |
| 910 | |
| 911 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopySizeInvalid) { |
| 912 | WriteInvalidVarintAtOffset(0x0C, 1); |
| 913 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 914 | bool failed = false; |
| 915 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 916 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 917 | failed = true; |
| 918 | // It should fail at the position that was altered |
| 919 | EXPECT_EQ(delta_file_header_.size() + 0x10, i); |
| 920 | break; |
| 921 | } |
| 922 | } |
| 923 | EXPECT_TRUE(failed); |
| 924 | // The decoder should not create more target bytes than were expected. |
| 925 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 926 | } |
| 927 | |
| 928 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopyAddressBeyondHereAddress) { |
| 929 | delta_file_[delta_file_header_.size() + 0x0D] = |
| 930 | FirstByteOfStringLength(kDictionary); |
| 931 | delta_file_[delta_file_header_.size() + 0x0E] = |
| 932 | SecondByteOfStringLength(kDictionary); |
| 933 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 934 | bool failed = false; |
| 935 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 936 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 937 | failed = true; |
| 938 | // It should fail at the position that was altered |
| 939 | EXPECT_EQ(delta_file_header_.size() + 0x0E, i); |
| 940 | break; |
| 941 | } |
| 942 | } |
| 943 | EXPECT_TRUE(failed); |
| 944 | // The decoder should not create more target bytes than were expected. |
| 945 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 946 | } |
| 947 | |
| 948 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopyAddressMaxInt) { |
| 949 | WriteMaxVarintAtOffset(0x0D, 1); |
| 950 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 951 | bool failed = false; |
| 952 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 953 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 954 | failed = true; |
| 955 | // It should fail at the position that was altered |
| 956 | EXPECT_EQ(delta_file_header_.size() + 0x11, i); |
| 957 | break; |
| 958 | } |
| 959 | } |
| 960 | EXPECT_TRUE(failed); |
| 961 | // The decoder should not create more target bytes than were expected. |
| 962 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 963 | } |
| 964 | |
| 965 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopyAddressNegative) { |
| 966 | WriteNegativeVarintAtOffset(0x0D, 1); |
| 967 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 968 | bool failed = false; |
| 969 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 970 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 971 | failed = true; |
| 972 | // It should fail at the position that was altered |
openvcdiff@gmail.com | f1dd933 | 2009-10-09 22:40:32 +0000 | [diff] [blame] | 973 | EXPECT_EQ(delta_file_header_.size() + 0x10, i); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 974 | break; |
| 975 | } |
| 976 | } |
| 977 | EXPECT_TRUE(failed); |
| 978 | // The decoder should not create more target bytes than were expected. |
| 979 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 980 | } |
| 981 | |
| 982 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, CopyAddressInvalid) { |
| 983 | WriteInvalidVarintAtOffset(0x0D, 1); |
| 984 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 985 | bool failed = false; |
| 986 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 987 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 988 | failed = true; |
| 989 | // It should fail at the position that was altered |
| 990 | EXPECT_EQ(delta_file_header_.size() + 0x11, i); |
| 991 | break; |
| 992 | } |
| 993 | } |
| 994 | EXPECT_TRUE(failed); |
| 995 | // The decoder should not create more target bytes than were expected. |
| 996 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 997 | } |
| 998 | |
| 999 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddMoreThanExpectedTarget) { |
| 1000 | delta_file_[delta_file_header_.size() + 0x0F] = |
| 1001 | FirstByteOfStringLength(kExpectedTarget); |
| 1002 | delta_file_[delta_file_header_.size() + 0x10] = |
| 1003 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 1004 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1005 | bool failed = false; |
| 1006 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1007 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1008 | failed = true; |
| 1009 | // It should fail at the position that was altered |
| 1010 | EXPECT_EQ(delta_file_header_.size() + 0x10, i); |
| 1011 | break; |
| 1012 | } |
| 1013 | } |
| 1014 | EXPECT_TRUE(failed); |
| 1015 | // The decoder should not create more target bytes than were expected. |
| 1016 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1017 | } |
| 1018 | |
| 1019 | // An ADD instruction with an explicit size of 0 is not illegal according to the |
| 1020 | // standard, although it is inefficient and should not be generated by any |
| 1021 | // reasonable encoder. Changing the size of an ADD instruction to zero will |
| 1022 | // cause a failure because the generated target window size will not match the |
| 1023 | // expected target size. |
| 1024 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeZero) { |
| 1025 | delta_file_[delta_file_header_.size() + 0x0F] = 0; |
| 1026 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1027 | bool failed = false; |
| 1028 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1029 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1030 | failed = true; |
| 1031 | break; |
| 1032 | } |
| 1033 | } |
| 1034 | EXPECT_TRUE(failed); |
| 1035 | // The decoder should not create more target bytes than were expected. |
| 1036 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1037 | } |
| 1038 | |
| 1039 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeTooLargeByOne) { |
| 1040 | ++delta_file_[delta_file_header_.size() + 0x0F]; |
| 1041 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1042 | bool failed = false; |
| 1043 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1044 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1045 | failed = true; |
| 1046 | break; |
| 1047 | } |
| 1048 | } |
| 1049 | EXPECT_TRUE(failed); |
| 1050 | // The decoder should not create more target bytes than were expected. |
| 1051 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1052 | } |
| 1053 | |
| 1054 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeTooSmallByOne) { |
| 1055 | --delta_file_[delta_file_header_.size() + 0x0F]; |
| 1056 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1057 | bool failed = false; |
| 1058 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1059 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1060 | failed = true; |
| 1061 | break; |
| 1062 | } |
| 1063 | } |
| 1064 | EXPECT_TRUE(failed); |
| 1065 | // The decoder should not create more target bytes than were expected. |
| 1066 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1067 | } |
| 1068 | |
| 1069 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeMaxInt) { |
| 1070 | WriteMaxVarintAtOffset(0x0F, 1); |
| 1071 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1072 | bool failed = false; |
| 1073 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1074 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1075 | failed = true; |
| 1076 | // It should fail at the position that was altered |
| 1077 | EXPECT_EQ(delta_file_header_.size() + 0x13, i); |
| 1078 | break; |
| 1079 | } |
| 1080 | } |
| 1081 | EXPECT_TRUE(failed); |
| 1082 | // The decoder should not create more target bytes than were expected. |
| 1083 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1084 | } |
| 1085 | |
| 1086 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeNegative) { |
| 1087 | WriteNegativeVarintAtOffset(0x0F, 1); |
| 1088 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1089 | bool failed = false; |
| 1090 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1091 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1092 | failed = true; |
| 1093 | // It should fail at the position that was altered |
openvcdiff@gmail.com | f1dd933 | 2009-10-09 22:40:32 +0000 | [diff] [blame] | 1094 | EXPECT_EQ(delta_file_header_.size() + 0x12, i); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 1095 | break; |
| 1096 | } |
| 1097 | } |
| 1098 | EXPECT_TRUE(failed); |
| 1099 | // The decoder should not create more target bytes than were expected. |
| 1100 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1101 | } |
| 1102 | |
| 1103 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, AddSizeInvalid) { |
| 1104 | WriteInvalidVarintAtOffset(0x0F, 1); |
| 1105 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1106 | bool failed = false; |
| 1107 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1108 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1109 | failed = true; |
| 1110 | // It should fail at the position that was altered |
| 1111 | EXPECT_EQ(delta_file_header_.size() + 0x13, i); |
| 1112 | break; |
| 1113 | } |
| 1114 | } |
| 1115 | EXPECT_TRUE(failed); |
| 1116 | // The decoder should not create more target bytes than were expected. |
| 1117 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1118 | } |
| 1119 | |
| 1120 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunMoreThanExpectedTarget) { |
| 1121 | delta_file_[delta_file_header_.size() + 0x5F] = |
| 1122 | FirstByteOfStringLength(kExpectedTarget); |
| 1123 | delta_file_[delta_file_header_.size() + 0x60] = |
| 1124 | SecondByteOfStringLength(kExpectedTarget) + 1; |
| 1125 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1126 | bool failed = false; |
| 1127 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1128 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1129 | failed = true; |
| 1130 | // It should fail at the position that was altered |
| 1131 | EXPECT_EQ(delta_file_header_.size() + 0x60, i); |
| 1132 | break; |
| 1133 | } |
| 1134 | } |
| 1135 | EXPECT_TRUE(failed); |
| 1136 | // The decoder should not create more target bytes than were expected. |
| 1137 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1138 | } |
| 1139 | |
| 1140 | // A RUN instruction with an explicit size of 0 is not illegal according to the |
| 1141 | // standard, although it is inefficient and should not be generated by any |
| 1142 | // reasonable encoder. Changing the size of a RUN instruction to zero will |
| 1143 | // cause a failure because the generated target window size will not match the |
| 1144 | // expected target size. |
| 1145 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeZero) { |
| 1146 | delta_file_[delta_file_header_.size() + 0x5F] = 0; |
| 1147 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1148 | bool failed = false; |
| 1149 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1150 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1151 | failed = true; |
| 1152 | break; |
| 1153 | } |
| 1154 | } |
| 1155 | EXPECT_TRUE(failed); |
| 1156 | // The decoder should not create more target bytes than were expected. |
| 1157 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1158 | } |
| 1159 | |
| 1160 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeTooLargeByOne) { |
| 1161 | ++delta_file_[delta_file_header_.size() + 0x5F]; |
| 1162 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1163 | bool failed = false; |
| 1164 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1165 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1166 | failed = true; |
| 1167 | break; |
| 1168 | } |
| 1169 | } |
| 1170 | EXPECT_TRUE(failed); |
| 1171 | // The decoder should not create more target bytes than were expected. |
| 1172 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1173 | } |
| 1174 | |
| 1175 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeTooSmallByOne) { |
| 1176 | --delta_file_[delta_file_header_.size() + 0x5F]; |
| 1177 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1178 | bool failed = false; |
| 1179 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1180 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1181 | failed = true; |
| 1182 | break; |
| 1183 | } |
| 1184 | } |
| 1185 | EXPECT_TRUE(failed); |
| 1186 | // The decoder should not create more target bytes than were expected. |
| 1187 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1188 | } |
| 1189 | |
| 1190 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeMaxInt) { |
| 1191 | WriteMaxVarintAtOffset(0x5F, 1); |
| 1192 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1193 | bool failed = false; |
| 1194 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1195 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1196 | failed = true; |
| 1197 | // It should fail at the position that was altered |
| 1198 | EXPECT_EQ(delta_file_header_.size() + 0x63, i); |
| 1199 | break; |
| 1200 | } |
| 1201 | } |
| 1202 | EXPECT_TRUE(failed); |
| 1203 | // The decoder should not create more target bytes than were expected. |
| 1204 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1205 | } |
| 1206 | |
| 1207 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeNegative) { |
| 1208 | WriteNegativeVarintAtOffset(0x5F, 1); |
| 1209 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1210 | bool failed = false; |
| 1211 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1212 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1213 | failed = true; |
| 1214 | // It should fail at the position that was altered |
openvcdiff@gmail.com | f1dd933 | 2009-10-09 22:40:32 +0000 | [diff] [blame] | 1215 | EXPECT_EQ(delta_file_header_.size() + 0x62, i); |
openvcdiff | 311c714 | 2008-08-26 19:29:25 +0000 | [diff] [blame] | 1216 | break; |
| 1217 | } |
| 1218 | } |
| 1219 | EXPECT_TRUE(failed); |
| 1220 | // The decoder should not create more target bytes than were expected. |
| 1221 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1222 | } |
| 1223 | |
| 1224 | TEST_F(VCDiffInterleavedDecoderTestByteByByte, RunSizeInvalid) { |
| 1225 | WriteInvalidVarintAtOffset(0x5F, 1); |
| 1226 | decoder_.StartDecoding(dictionary_.data(), dictionary_.size()); |
| 1227 | bool failed = false; |
| 1228 | for (size_t i = 0; i < delta_file_.size(); ++i) { |
| 1229 | if (!decoder_.DecodeChunk(&delta_file_[i], 1, &output_)) { |
| 1230 | failed = true; |
| 1231 | // It should fail at the position that was altered |
| 1232 | EXPECT_EQ(delta_file_header_.size() + 0x63, i); |
| 1233 | break; |
| 1234 | } |
| 1235 | } |
| 1236 | EXPECT_TRUE(failed); |
| 1237 | // The decoder should not create more target bytes than were expected. |
| 1238 | EXPECT_GE(expected_target_.size(), output_.size()); |
| 1239 | } |
| 1240 | |
| 1241 | } // namespace open_vcdiff |