net/spdy/hpack_decoder_test.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/spdy/hpack_decoder.h"
   6
   7 #include <map>
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/logging.h"
  12 #include "base/strings/string_piece.h"
  13 #include "net/spdy/hpack_encoder.h"
  14 #include "net/spdy/hpack_input_stream.h"
  15 #include "net/spdy/hpack_output_stream.h"
  16 #include "net/spdy/spdy_test_utils.h"
  17 #include "testing/gmock/include/gmock/gmock.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 namespace net {
  21
  22 namespace test {
  23
  24 using base::StringPiece;
  25 using std::string;
  26
  27 class HpackDecoderPeer {
  28  public:
  29   explicit HpackDecoderPeer(HpackDecoder* decoder)
  30       : decoder_(decoder) {}
  31
  32   void HandleHeaderRepresentation(StringPiece name, StringPiece value) {
  33     decoder_->HandleHeaderRepresentation(name, value);
  34   }
  35   bool DecodeNextName(HpackInputStream* in, StringPiece* out) {
  36     return decoder_->DecodeNextName(in, out);
  37   }
  38   HpackHeaderTable* header_table() {
  39     return &decoder_->header_table_;
  40   }
  41   void set_cookie_value(string value) {
  42     decoder_->cookie_value_ = value;
  43   }
  44   string cookie_value() {
  45     return decoder_->cookie_value_;
  46   }
  47   const std::map<string, string>& decoded_block() const {
  48     return decoder_->decoded_block_;
  49   }
  50   const string& headers_block_buffer() const {
  51     return decoder_->headers_block_buffer_;
  52   }
  53
  54  private:
  55   HpackDecoder* decoder_;
  56 };
  57
  58 }  // namespace test
  59
  60 namespace {
  61
  62 using base::StringPiece;
  63 using std::string;
  64 using test::a2b_hex;
  65
  66 using testing::ElementsAre;
  67 using testing::Pair;
  68
  69 const size_t kLiteralBound = 1024;
  70
  71 class HpackDecoderTest : public ::testing::Test {
  72  protected:
  73   HpackDecoderTest()
  74       : decoder_(ObtainHpackHuffmanTable()),
  75         decoder_peer_(&decoder_) {}
  76
  77   bool DecodeHeaderBlock(StringPiece str) {
  78     return decoder_.HandleControlFrameHeadersData(0, str.data(), str.size()) &&
  79         decoder_.HandleControlFrameHeadersComplete(0);
  80   }
  81
  82   const std::map<string, string>& decoded_block() const {
  83     // TODO(jgraettinger): HpackDecoderTest should implement
  84     // SpdyHeadersHandlerInterface, and collect headers for examination.
  85     return decoder_peer_.decoded_block();
  86   }
  87
  88   const std::map<string, string>& DecodeBlockExpectingSuccess(StringPiece str) {
  89     EXPECT_TRUE(DecodeHeaderBlock(str));
  90     return decoded_block();
  91   }
  92
  93   void expectEntry(size_t index, size_t size, const string& name,
  94                    const string& value) {
  95     HpackEntry* entry = decoder_peer_.header_table()->GetByIndex(index);
  96     EXPECT_EQ(name, entry->name()) << "index " << index;
  97     EXPECT_EQ(value, entry->value());
  98     EXPECT_EQ(size, entry->Size());
  99     EXPECT_EQ(index, decoder_peer_.header_table()->IndexOf(entry));
 100   }
 101
 102   HpackDecoder decoder_;
 103   test::HpackDecoderPeer decoder_peer_;
 104 };
 105
 106 TEST_F(HpackDecoderTest, HandleControlFrameHeadersData) {
 107   // Strings under threshold are concatenated in the buffer.
 108   EXPECT_TRUE(decoder_.HandleControlFrameHeadersData(
 109       0, "small string one", 16));
 110   EXPECT_TRUE(decoder_.HandleControlFrameHeadersData(
 111       0, "small string two", 16));
 112   // A string which would push the buffer over the threshold is refused.
 113   EXPECT_FALSE(decoder_.HandleControlFrameHeadersData(
 114       0, "fails", kMaxDecodeBufferSize - 32 + 1));
 115
 116   EXPECT_EQ(decoder_peer_.headers_block_buffer(),
 117             "small string onesmall string two");
 118 }
 119
 120 TEST_F(HpackDecoderTest, HandleControlFrameHeadersComplete) {
 121   decoder_peer_.set_cookie_value("foobar=baz");
 122
 123   // Incremental cookie buffer should be emitted and cleared.
 124   decoder_.HandleControlFrameHeadersData(0, "\x82\x85", 2);
 125   decoder_.HandleControlFrameHeadersComplete(0);
 126
 127   EXPECT_THAT(decoded_block(), ElementsAre(
 128       Pair(":method", "GET"),
 129       Pair(":path", "/index.html"),
 130       Pair("cookie", "foobar=baz")));
 131   EXPECT_EQ(decoder_peer_.cookie_value(), "");
 132 }
 133
 134 TEST_F(HpackDecoderTest, HandleHeaderRepresentation) {
 135   // All cookie crumbs are joined.
 136   decoder_peer_.HandleHeaderRepresentation("cookie", " part 1");
 137   decoder_peer_.HandleHeaderRepresentation("cookie", "part 2 ");
 138   decoder_peer_.HandleHeaderRepresentation("cookie", "part3");
 139
 140   // Already-delimited headers are passed through.
 141   decoder_peer_.HandleHeaderRepresentation("passed-through",
 142                                            string("foo\0baz", 7));
 143
 144   // Other headers are joined on \0. Case matters.
 145   decoder_peer_.HandleHeaderRepresentation("joined", "not joined");
 146   decoder_peer_.HandleHeaderRepresentation("joineD", "value 1");
 147   decoder_peer_.HandleHeaderRepresentation("joineD", "value 2");
 148
 149   // Empty headers remain empty.
 150   decoder_peer_.HandleHeaderRepresentation("empty", "");
 151
 152   // Joined empty headers work as expected.
 153   decoder_peer_.HandleHeaderRepresentation("empty-joined", "");
 154   decoder_peer_.HandleHeaderRepresentation("empty-joined", "foo");
 155   decoder_peer_.HandleHeaderRepresentation("empty-joined", "");
 156   decoder_peer_.HandleHeaderRepresentation("empty-joined", "");
 157
 158   // Non-contiguous cookie crumb.
 159   decoder_peer_.HandleHeaderRepresentation("cookie", " fin!");
 160
 161   // Finish and emit all headers.
 162   decoder_.HandleControlFrameHeadersComplete(0);
 163
 164   EXPECT_THAT(decoded_block(), ElementsAre(
 165       Pair("cookie", " part 1; part 2 ; part3;  fin!"),
 166       Pair("empty", ""),
 167       Pair("empty-joined", string("\0foo\0\0", 6)),
 168       Pair("joineD", string("value 1\0value 2", 15)),
 169       Pair("joined", "not joined"),
 170       Pair("passed-through", string("foo\0baz", 7))));
 171 }
 172
 173 // Decoding an encoded name with a valid string literal should work.
 174 TEST_F(HpackDecoderTest, DecodeNextNameLiteral) {
 175   HpackInputStream input_stream(kLiteralBound, StringPiece("\x00\x04name", 6));
 176
 177   StringPiece string_piece;
 178   EXPECT_TRUE(decoder_peer_.DecodeNextName(&input_stream, &string_piece));
 179   EXPECT_EQ("name", string_piece);
 180   EXPECT_FALSE(input_stream.HasMoreData());
 181 }
 182
 183 TEST_F(HpackDecoderTest, DecodeNextNameLiteralWithHuffmanEncoding) {
 184   string input = a2b_hex("008825a849e95ba97d7f");
 185   HpackInputStream input_stream(kLiteralBound, input);
 186
 187   StringPiece string_piece;
 188   EXPECT_TRUE(decoder_peer_.DecodeNextName(&input_stream, &string_piece));
 189   EXPECT_EQ("custom-key", string_piece);
 190   EXPECT_FALSE(input_stream.HasMoreData());
 191 }
 192
 193 // Decoding an encoded name with a valid index should work.
 194 TEST_F(HpackDecoderTest, DecodeNextNameIndexed) {
 195   HpackInputStream input_stream(kLiteralBound, "\x01");
 196
 197   StringPiece string_piece;
 198   EXPECT_TRUE(decoder_peer_.DecodeNextName(&input_stream, &string_piece));
 199   EXPECT_EQ(":authority", string_piece);
 200   EXPECT_FALSE(input_stream.HasMoreData());
 201 }
 202
 203 // Decoding an encoded name with an invalid index should fail.
 204 TEST_F(HpackDecoderTest, DecodeNextNameInvalidIndex) {
 205   // One more than the number of static table entries.
 206   HpackInputStream input_stream(kLiteralBound, "\x3e");
 207
 208   StringPiece string_piece;
 209   EXPECT_FALSE(decoder_peer_.DecodeNextName(&input_stream, &string_piece));
 210 }
 211
 212 // Decoding indexed static table field should work.
 213 TEST_F(HpackDecoderTest, IndexedHeaderStatic) {
 214   // Reference static table entries #2 and #5.
 215   std::map<string, string> header_set1 =
 216       DecodeBlockExpectingSuccess("\x82\x85");
 217   std::map<string, string> expected_header_set1;
 218   expected_header_set1[":method"] = "GET";
 219   expected_header_set1[":path"] = "/index.html";
 220   EXPECT_EQ(expected_header_set1, header_set1);
 221
 222   // Reference static table entry #2.
 223   std::map<string, string> header_set2 =
 224       DecodeBlockExpectingSuccess("\x82");
 225   std::map<string, string> expected_header_set2;
 226   expected_header_set2[":method"] = "GET";
 227   EXPECT_EQ(expected_header_set2, header_set2);
 228 }
 229
 230 TEST_F(HpackDecoderTest, IndexedHeaderDynamic) {
 231   // First header block: add an entry to header table.
 232   std::map<string, string> header_set1 =
 233       DecodeBlockExpectingSuccess("\x40\x03" "foo" "\x03" "bar");
 234   std::map<string, string> expected_header_set1;
 235   expected_header_set1["foo"] = "bar";
 236   EXPECT_EQ(expected_header_set1, header_set1);
 237
 238   // Second header block: add another entry to header table.
 239   std::map<string, string> header_set2 =
 240       DecodeBlockExpectingSuccess("\xbe\x40\x04" "spam" "\x04" "eggs");
 241   std::map<string, string> expected_header_set2;
 242   expected_header_set2["foo"] = "bar";
 243   expected_header_set2["spam"] = "eggs";
 244   EXPECT_EQ(expected_header_set2, header_set2);
 245
 246   // Third header block: refer to most recently added entry.
 247   std::map<string, string> header_set3 =
 248       DecodeBlockExpectingSuccess("\xbe");
 249   std::map<string, string> expected_header_set3;
 250   expected_header_set3["spam"] = "eggs";
 251   EXPECT_EQ(expected_header_set3, header_set3);
 252 }
 253
 254 // Test a too-large indexed header.
 255 TEST_F(HpackDecoderTest, InvalidIndexedHeader) {
 256   // High-bit set, and a prefix of one more than the number of static entries.
 257   EXPECT_FALSE(DecodeHeaderBlock(StringPiece("\xbe", 1)));
 258 }
 259
 260 TEST_F(HpackDecoderTest, ContextUpdateMaximumSize) {
 261   EXPECT_EQ(kDefaultHeaderTableSizeSetting,
 262             decoder_peer_.header_table()->max_size());
 263   string input;
 264   {
 265     // Maximum-size update with size 126. Succeeds.
 266     HpackOutputStream output_stream;
 267     output_stream.AppendPrefix(kHeaderTableSizeUpdateOpcode);
 268     output_stream.AppendUint32(126);
 269
 270     output_stream.TakeString(&input);
 271     EXPECT_TRUE(DecodeHeaderBlock(StringPiece(input)));
 272     EXPECT_EQ(126u, decoder_peer_.header_table()->max_size());
 273   }
 274   {
 275     // Maximum-size update with kDefaultHeaderTableSizeSetting. Succeeds.
 276     HpackOutputStream output_stream;
 277     output_stream.AppendPrefix(kHeaderTableSizeUpdateOpcode);
 278     output_stream.AppendUint32(kDefaultHeaderTableSizeSetting);
 279
 280     output_stream.TakeString(&input);
 281     EXPECT_TRUE(DecodeHeaderBlock(StringPiece(input)));
 282     EXPECT_EQ(kDefaultHeaderTableSizeSetting,
 283               decoder_peer_.header_table()->max_size());
 284   }
 285   {
 286     // Maximum-size update with kDefaultHeaderTableSizeSetting + 1. Fails.
 287     HpackOutputStream output_stream;
 288     output_stream.AppendPrefix(kHeaderTableSizeUpdateOpcode);
 289     output_stream.AppendUint32(kDefaultHeaderTableSizeSetting + 1);
 290
 291     output_stream.TakeString(&input);
 292     EXPECT_FALSE(DecodeHeaderBlock(StringPiece(input)));
 293     EXPECT_EQ(kDefaultHeaderTableSizeSetting,
 294               decoder_peer_.header_table()->max_size());
 295   }
 296 }
 297
 298 // Decoding two valid encoded literal headers with no indexing should
 299 // work.
 300 TEST_F(HpackDecoderTest, LiteralHeaderNoIndexing) {
 301   // First header with indexed name, second header with string literal
 302   // name.
 303   const char input[] = "\x04\x0c/sample/path\x00\x06:path2\x0e/sample/path/2";
 304   std::map<string, string> header_set =
 305       DecodeBlockExpectingSuccess(StringPiece(input, arraysize(input) - 1));
 306
 307   std::map<string, string> expected_header_set;
 308   expected_header_set[":path"] = "/sample/path";
 309   expected_header_set[":path2"] = "/sample/path/2";
 310   EXPECT_EQ(expected_header_set, header_set);
 311 }
 312
 313 // Decoding two valid encoded literal headers with incremental
 314 // indexing and string literal names should work.
 315 TEST_F(HpackDecoderTest, LiteralHeaderIncrementalIndexing) {
 316   const char input[] = "\x44\x0c/sample/path\x40\x06:path2\x0e/sample/path/2";
 317   std::map<string, string> header_set =
 318       DecodeBlockExpectingSuccess(StringPiece(input, arraysize(input) - 1));
 319
 320   std::map<string, string> expected_header_set;
 321   expected_header_set[":path"] = "/sample/path";
 322   expected_header_set[":path2"] = "/sample/path/2";
 323   EXPECT_EQ(expected_header_set, header_set);
 324 }
 325
 326 TEST_F(HpackDecoderTest, LiteralHeaderWithIndexingInvalidNameIndex) {
 327   decoder_.ApplyHeaderTableSizeSetting(0);
 328
 329   // Name is the last static index. Works.
 330   EXPECT_TRUE(DecodeHeaderBlock(StringPiece("\x7d\x03ooo")));
 331   // Name is one beyond the last static index. Fails.
 332   EXPECT_FALSE(DecodeHeaderBlock(StringPiece("\x7e\x03ooo")));
 333 }
 334
 335 TEST_F(HpackDecoderTest, LiteralHeaderNoIndexingInvalidNameIndex) {
 336   // Name is the last static index. Works.
 337   EXPECT_TRUE(DecodeHeaderBlock(StringPiece("\x0f\x2e\x03ooo")));
 338   // Name is one beyond the last static index. Fails.
 339   EXPECT_FALSE(DecodeHeaderBlock(StringPiece("\x0f\x2f\x03ooo")));
 340 }
 341
 342 TEST_F(HpackDecoderTest, LiteralHeaderNeverIndexedInvalidNameIndex) {
 343   // Name is the last static index. Works.
 344   EXPECT_TRUE(DecodeHeaderBlock(StringPiece("\x1f\x2e\x03ooo")));
 345   // Name is one beyond the last static index. Fails.
 346   EXPECT_FALSE(DecodeHeaderBlock(StringPiece("\x1f\x2f\x03ooo")));
 347 }
 348
 349 // Round-tripping the header set from E.2.1 should work.
 350 TEST_F(HpackDecoderTest, BasicE21) {
 351   HpackEncoder encoder(ObtainHpackHuffmanTable());
 352
 353   std::map<string, string> expected_header_set;
 354   expected_header_set[":method"] = "GET";
 355   expected_header_set[":scheme"] = "http";
 356   expected_header_set[":path"] = "/";
 357   expected_header_set[":authority"] = "www.example.com";
 358
 359   string encoded_header_set;
 360   EXPECT_TRUE(encoder.EncodeHeaderSet(
 361       expected_header_set, &encoded_header_set));
 362
 363   EXPECT_TRUE(DecodeHeaderBlock(encoded_header_set));
 364   EXPECT_EQ(expected_header_set, decoded_block());
 365 }
 366
 367 TEST_F(HpackDecoderTest, SectionD4RequestHuffmanExamples) {
 368   std::map<string, string> header_set;
 369
 370   // 82                                      | == Indexed - Add ==
 371   //                                         |   idx = 2
 372   //                                         | -> :method: GET
 373   // 86                                      | == Indexed - Add ==
 374   //                                         |   idx = 6
 375   //                                         | -> :scheme: http
 376   // 84                                      | == Indexed - Add ==
 377   //                                         |   idx = 4
 378   //                                         | -> :path: /
 379   // 41                                      | == Literal indexed ==
 380   //                                         |   Indexed name (idx = 1)
 381   //                                         |     :authority
 382   // 8c                                      |   Literal value (len = 15)
 383   //                                         |     Huffman encoded:
 384   // f1e3 c2e5 f23a 6ba0 ab90 f4ff           | .....:k.....
 385   //                                         |     Decoded:
 386   //                                         | www.example.com
 387   //                                         | -> :authority: www.example.com
 388   string first = a2b_hex("828684418cf1e3c2e5f23a6ba0ab90f4"
 389                          "ff");
 390   header_set = DecodeBlockExpectingSuccess(first);
 391
 392   EXPECT_THAT(header_set, ElementsAre(
 393       Pair(":authority", "www.example.com"),
 394       Pair(":method", "GET"),
 395       Pair(":path", "/"),
 396       Pair(":scheme", "http")));
 397
 398   expectEntry(62, 57, ":authority", "www.example.com");
 399   EXPECT_EQ(57u, decoder_peer_.header_table()->size());
 400
 401   // 82                                      | == Indexed - Add ==
 402   //                                         |   idx = 2
 403   //                                         | -> :method: GET
 404   // 86                                      | == Indexed - Add ==
 405   //                                         |   idx = 6
 406   //                                         | -> :scheme: http
 407   // 84                                      | == Indexed - Add ==
 408   //                                         |   idx = 4
 409   //                                         | -> :path: /
 410   // be                                      | == Indexed - Add ==
 411   //                                         |   idx = 62
 412   //                                         | -> :authority: www.example.com
 413   // 58                                      | == Literal indexed ==
 414   //                                         |   Indexed name (idx = 24)
 415   //                                         |     cache-control
 416   // 86                                      |   Literal value (len = 8)
 417   //                                         |     Huffman encoded:
 418   // a8eb 1064 9cbf                          | ...d..
 419   //                                         |     Decoded:
 420   //                                         | no-cache
 421   //                                         | -> cache-control: no-cache
 422
 423   string second = a2b_hex("828684be5886a8eb10649cbf");
 424   header_set = DecodeBlockExpectingSuccess(second);
 425
 426   EXPECT_THAT(header_set, ElementsAre(
 427       Pair(":authority", "www.example.com"),
 428       Pair(":method", "GET"),
 429       Pair(":path", "/"),
 430       Pair(":scheme", "http"),
 431       Pair("cache-control", "no-cache")));
 432
 433   expectEntry(62, 53, "cache-control", "no-cache");
 434   expectEntry(63, 57, ":authority", "www.example.com");
 435   EXPECT_EQ(110u, decoder_peer_.header_table()->size());
 436
 437   // 82                                      | == Indexed - Add ==
 438   //                                         |   idx = 2
 439   //                                         | -> :method: GET
 440   // 87                                      | == Indexed - Add ==
 441   //                                         |   idx = 7
 442   //                                         | -> :scheme: https
 443   // 85                                      | == Indexed - Add ==
 444   //                                         |   idx = 5
 445   //                                         | -> :path: /index.html
 446   // bf                                      | == Indexed - Add ==
 447   //                                         |   idx = 63
 448   //                                         | -> :authority: www.example.com
 449   // 40                                      | == Literal indexed ==
 450   // 88                                      |   Literal name (len = 10)
 451   //                                         |     Huffman encoded:
 452   // 25a8 49e9 5ba9 7d7f                     | %.I.[.}.
 453   //                                         |     Decoded:
 454   //                                         | custom-key
 455   // 89                                      |   Literal value (len = 12)
 456   //                                         |     Huffman encoded:
 457   // 25a8 49e9 5bb8 e8b4 bf                  | %.I.[....
 458   //                                         |     Decoded:
 459   //                                         | custom-value
 460   //                                         | -> custom-key: custom-value
 461   string third = a2b_hex("828785bf408825a849e95ba97d7f89"
 462                          "25a849e95bb8e8b4bf");
 463   header_set = DecodeBlockExpectingSuccess(third);
 464
 465   EXPECT_THAT(header_set, ElementsAre(
 466       Pair(":authority", "www.example.com"),
 467       Pair(":method", "GET"),
 468       Pair(":path", "/index.html"),
 469       Pair(":scheme", "https"),
 470       Pair("custom-key", "custom-value")));
 471
 472   expectEntry(62, 54, "custom-key", "custom-value");
 473   expectEntry(63, 53, "cache-control", "no-cache");
 474   expectEntry(64, 57, ":authority", "www.example.com");
 475   EXPECT_EQ(164u, decoder_peer_.header_table()->size());
 476 }
 477
 478 TEST_F(HpackDecoderTest, SectionD6ResponseHuffmanExamples) {
 479   std::map<string, string> header_set;
 480   decoder_.ApplyHeaderTableSizeSetting(256);
 481
 482   // 48                                      | == Literal indexed ==
 483   //                                         |   Indexed name (idx = 8)
 484   //                                         |     :status
 485   // 82                                      |   Literal value (len = 3)
 486   //                                         |     Huffman encoded:
 487   // 6402                                    | d.
 488   //                                         |     Decoded:
 489   //                                         | 302
 490   //                                         | -> :status: 302
 491   // 58                                      | == Literal indexed ==
 492   //                                         |   Indexed name (idx = 24)
 493   //                                         |     cache-control
 494   // 85                                      |   Literal value (len = 7)
 495   //                                         |     Huffman encoded:
 496   // aec3 771a 4b                            | ..w.K
 497   //                                         |     Decoded:
 498   //                                         | private
 499   //                                         | -> cache-control: private
 500   // 61                                      | == Literal indexed ==
 501   //                                         |   Indexed name (idx = 33)
 502   //                                         |     date
 503   // 96                                      |   Literal value (len = 29)
 504   //                                         |     Huffman encoded:
 505   // d07a be94 1054 d444 a820 0595 040b 8166 | .z...T.D. .....f
 506   // e082 a62d 1bff                          | ...-..
 507   //                                         |     Decoded:
 508   //                                         | Mon, 21 Oct 2013 20:13:21
 509   //                                         | GMT
 510   //                                         | -> date: Mon, 21 Oct 2013
 511   //                                         |   20:13:21 GMT
 512   // 6e                                      | == Literal indexed ==
 513   //                                         |   Indexed name (idx = 46)
 514   //                                         |     location
 515   // 91                                      |   Literal value (len = 23)
 516   //                                         |     Huffman encoded:
 517   // 9d29 ad17 1863 c78f 0b97 c8e9 ae82 ae43 | .)...c.........C
 518   // d3                                      | .
 519   //                                         |     Decoded:
 520   //                                         | https://www.example.com
 521   //                                         | -> location: https://www.e
 522   //                                         |    xample.com
 523
 524   string first = a2b_hex("488264025885aec3771a4b6196d07abe"
 525                          "941054d444a8200595040b8166e082a6"
 526                          "2d1bff6e919d29ad171863c78f0b97c8"
 527                          "e9ae82ae43d3");
 528   header_set = DecodeBlockExpectingSuccess(first);
 529
 530   EXPECT_THAT(header_set, ElementsAre(
 531       Pair(":status", "302"),
 532       Pair("cache-control", "private"),
 533       Pair("date", "Mon, 21 Oct 2013 20:13:21 GMT"),
 534       Pair("location", "https://www.example.com")));
 535
 536   expectEntry(62, 63, "location", "https://www.example.com");
 537   expectEntry(63, 65, "date", "Mon, 21 Oct 2013 20:13:21 GMT");
 538   expectEntry(64, 52, "cache-control", "private");
 539   expectEntry(65, 42, ":status", "302");
 540   EXPECT_EQ(222u, decoder_peer_.header_table()->size());
 541
 542   // 48                                      | == Literal indexed ==
 543   //                                         |   Indexed name (idx = 8)
 544   //                                         |     :status
 545   // 83                                      |   Literal value (len = 3)
 546   //                                         |     Huffman encoded:
 547   // 640e ff                                 | d..
 548   //                                         |     Decoded:
 549   //                                         | 307
 550   //                                         | - evict: :status: 302
 551   //                                         | -> :status: 307
 552   // c1                                      | == Indexed - Add ==
 553   //                                         |   idx = 65
 554   //                                         | -> cache-control: private
 555   // c0                                      | == Indexed - Add ==
 556   //                                         |   idx = 64
 557   //                                         | -> date: Mon, 21 Oct 2013
 558   //                                         |   20:13:21 GMT
 559   // bf                                      | == Indexed - Add ==
 560   //                                         |   idx = 63
 561   //                                         | -> location:
 562   //                                         |   https://www.example.com
 563   string second = a2b_hex("4883640effc1c0bf");
 564   header_set = DecodeBlockExpectingSuccess(second);
 565
 566   EXPECT_THAT(header_set, ElementsAre(
 567       Pair(":status", "307"),
 568       Pair("cache-control", "private"),
 569       Pair("date", "Mon, 21 Oct 2013 20:13:21 GMT"),
 570       Pair("location", "https://www.example.com")));
 571
 572   expectEntry(62, 42, ":status", "307");
 573   expectEntry(63, 63, "location", "https://www.example.com");
 574   expectEntry(64, 65, "date", "Mon, 21 Oct 2013 20:13:21 GMT");
 575   expectEntry(65, 52, "cache-control", "private");
 576   EXPECT_EQ(222u, decoder_peer_.header_table()->size());
 577
 578   // 88                                      | == Indexed - Add ==
 579   //                                         |   idx = 8
 580   //                                         | -> :status: 200
 581   // c1                                      | == Indexed - Add ==
 582   //                                         |   idx = 65
 583   //                                         | -> cache-control: private
 584   // 61                                      | == Literal indexed ==
 585   //                                         |   Indexed name (idx = 33)
 586   //                                         |     date
 587   // 96                                      |   Literal value (len = 22)
 588   //                                         |     Huffman encoded:
 589   // d07a be94 1054 d444 a820 0595 040b 8166 | .z...T.D. .....f
 590   // e084 a62d 1bff                          | ...-..
 591   //                                         |     Decoded:
 592   //                                         | Mon, 21 Oct 2013 20:13:22
 593   //                                         | GMT
 594   //                                         | - evict: cache-control:
 595   //                                         |   private
 596   //                                         | -> date: Mon, 21 Oct 2013
 597   //                                         |   20:13:22 GMT
 598   // c0                                      | == Indexed - Add ==
 599   //                                         |   idx = 64
 600   //                                         | -> location:
 601   //                                         |    https://www.example.com
 602   // 5a                                      | == Literal indexed ==
 603   //                                         |   Indexed name (idx = 26)
 604   //                                         |     content-encoding
 605   // 83                                      |   Literal value (len = 3)
 606   //                                         |     Huffman encoded:
 607   // 9bd9 ab                                 | ...
 608   //                                         |     Decoded:
 609   //                                         | gzip
 610   //                                         | - evict: date: Mon, 21 Oct
 611   //                                         |    2013 20:13:21 GMT
 612   //                                         | -> content-encoding: gzip
 613   // 77                                      | == Literal indexed ==
 614   //                                         |   Indexed name (idx = 55)
 615   //                                         |     set-cookie
 616   // ad                                      |   Literal value (len = 45)
 617   //                                         |     Huffman encoded:
 618   // 94e7 821d d7f2 e6c7 b335 dfdf cd5b 3960 | .........5...[9`
 619   // d5af 2708 7f36 72c1 ab27 0fb5 291f 9587 | ..'..6r..'..)...
 620   // 3160 65c0 03ed 4ee5 b106 3d50 07        | 1`e...N...=P.
 621   //                                         |     Decoded:
 622   //                                         | foo=ASDJKHQKBZXOQWEOPIUAXQ
 623   //                                         | WEOIU; max-age=3600; versi
 624   //                                         | on=1
 625   //                                         | - evict: location:
 626   //                                         |   https://www.example.com
 627   //                                         | - evict: :status: 307
 628   //                                         | -> set-cookie: foo=ASDJKHQ
 629   //                                         |   KBZXOQWEOPIUAXQWEOIU;
 630   //                                         |   max-age=3600; version=1
 631   string third = a2b_hex("88c16196d07abe941054d444a8200595"
 632                          "040b8166e084a62d1bffc05a839bd9ab"
 633                          "77ad94e7821dd7f2e6c7b335dfdfcd5b"
 634                          "3960d5af27087f3672c1ab270fb5291f"
 635                          "9587316065c003ed4ee5b1063d5007");
 636   header_set = DecodeBlockExpectingSuccess(third);
 637
 638   EXPECT_THAT(header_set, ElementsAre(
 639       Pair(":status", "200"),
 640       Pair("cache-control", "private"),
 641       Pair("content-encoding", "gzip"),
 642       Pair("date", "Mon, 21 Oct 2013 20:13:22 GMT"),
 643       Pair("location", "https://www.example.com"),
 644       Pair("set-cookie", "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;"
 645            " max-age=3600; version=1")));
 646
 647   expectEntry(62, 98, "set-cookie", "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU;"
 648               " max-age=3600; version=1");
 649   expectEntry(63, 52, "content-encoding", "gzip");
 650   expectEntry(64, 65, "date", "Mon, 21 Oct 2013 20:13:22 GMT");
 651   EXPECT_EQ(215u, decoder_peer_.header_table()->size());
 652 }
 653
 654 }  // namespace
 655
 656 }  // namespace net