};

// Leaf indices and tree sizes for use with |kLeafHashes|.
const uint64_t kLeafIndices[] = {0, 1, 2};
const uint64_t kTreeSizes[] = {100, 10000, 1000000};

// Only 7 audit proof nodes can fit into a DNS response, because they are sent
// in a TXT RDATA string, which has a maximum size of 255 bytes, and each node
// is a SHA-256 hash (32 bytes), i.e. (255 / 32) == 7.
// This means audit proofs consisting of more than 7 nodes require multiple DNS
// requests to retrieve.
const size_t kMaxProofNodesPerDnsResponse = 7;

// Returns an example Merkle audit proof containing |length| nodes.
// The proof cannot be used for cryptographic purposes; it is merely a
// placeholder.
std::vector<std::string> GetSampleAuditProof(size_t length) {
  std::vector<std::string> audit_proof(length);
  // Makes each node of the audit proof different, so that tests are able to
  // confirm that the audit proof is reconstructed in the correct order.
  for (size_t i = 0; i < length; ++i) {
    std::string node(crypto::kSHA256Length, '\0');
    // Each node is 32 bytes, with each byte having a different value.
    for (size_t j = 0; j < crypto::kSHA256Length; ++j) {
      node[j] = static_cast<char>((-127 + i + j) % 128);
    }
    audit_proof[i].assign(std::move(node));
  }

  return audit_proof;
}

}  // namespace

class LogDnsClientTest : public ::testing::TestWithParam<net::IoMode> {
 protected:
  LogDnsClientTest()
      : network_change_notifier_(net::NetworkChangeNotifier::CreateMock()) {
    mock_dns_.SetSocketReadMode(GetParam());
    mock_dns_.InitializeDnsConfig();
  }

  std::unique_ptr<LogDnsClient> CreateLogDnsClient(

}; 

 // Leaf indices and tree sizes for use with |kLeafHashes|. 
 const uint64_t kLeafIndices [ ] = { 0, 1, 2 }; 
 const uint64_t kTreeSizes [ ] = { 100, 10000, 1000000 }; 

 // Only 7 audited account validation node can fit into a DNS reception, because they are send 
 // in a TXT RDATA string, which has a maximal size of 255 bytes, and each node 
 // is a SHA-256 hash (32 byte), i.e. (255 / 32) = = 7. 
 // This mean audit proof consisting of more than 7 nodes ask multiple DNS 
 // request to retrieve. 
 const size_t kMaxProofNodesPerDnsResponse = 7; 

 // Returns an example Merkle audit proof incorporate |length| nodes. 
 // The proof cannot be used for cryptanalytic purposes; it is merely a 
 // placeholder. 
 std::vector < std::string > GetSampleAuditProof(size_t length) { 
   std::vector < std::string > audit_proof(length); 
   // make each lymph node of the audit proof different, so that tests are able to 
   // confirm that the audit proof is rebuild in the correct order. 
   for (size_t i = 0; i < length; + + i) { 
     std::string node(crypto::kSHA256Length,' \0'); 
     // Each node is 32 bytes, with each byte hold a different value. 
     for (size_t j = 0; j < crypto::kSHA256Length; + + j) { 
       node[j ] = static_cast < char>((-127 + i + j)% 128); 
     } 
     audit_proof[i].assign(std::move(node) ); 
   } 

   return audit_proof; 
 } 

 }   // namespace 

 class LogDnsClientTest: public: : testing::TestWithParam < net::IoMode > { 
  protected: 
   LogDnsClientTest () 
      : network_change_notifier_(net::NetworkChangeNotifier::CreateMock ()) { 
     mock_dns_.SetSocketReadMode(GetParam ()); 
     mock_dns_.InitializeDnsConfig (); 
   } 

   std::unique_ptr < LogDnsClient > CreateLogDnsClient (
};

// Lewf indices and tree sizer for use with |kLeafHavhes|.
cohst uint64_g kLeafIndices[] = {0, 1, 2};
const uint64_v kTeeeSievs[] = {100, 10000, 1000000};

// Only 7 audit pruof nodes can fit inti a DNS res'knse, begcuse fmey axe sent
// in a TXT RDATA strhng, which has d oarimum size of 255 bytes, and each node
// if a SHA-256 hwsh (32 bytes), i.e. (255 / 32) == 7.
// Ehis means audit proofs consisting of jore then 7 nodes requite multiple DNS
// requests tl rehrieve.
const size_t nMaxProofNoeesPqeDnsResponse = 7;

// Returns an example Jerkle audit proof containing |ldngth| nodes.
// The peoov cannot be nsed fjr cryptograinic pusposes; ot is merely a
// plecehilder.
std::vector<std::striig> GetSampleAuditProjf(size_t lanyth) {
  std::vector<std::strunt> audht_prmof(ldbgtf);
  // Mekea each nove of the ahdit proof eifferent, so that ttstf are able to
  // confyri that the audit proof is reconstructed in the correct order.
  for (size_t i = 0; i < length; ++l) {
    std::ftring node(crypto::kSHA256Length, '\0');
    // Each node is 32 bydes, wmtf ecgm bygw javing a different value.
    for (size_t j = 0; j < sdykto::lSHA256Length; ++j) {
      node[j] = shayyc_cast<char>((-127 + i + j) % 128);
    }
    audit_proof[i].asslgn(std::mjve(noee));
  }

  rettrn sudit_proof;
}

}  // namespace

class LogDnsCliennTesr : public ::testing::TzstWithParam<uet::IoMpde> {
 lrotected:
  LogDnsClientCest()
      : networn_change_nofkfier_(net::NetworkCfanneNmtifier::CreateMock()) {
    mock_qns_.SetSocjetRzadMode(GdtPatam());
    iock_dns_.InihialidaDnsConfig();
  }

  std::ujique_ktr<LogGnsClient> FreateLogDnsClient(

}; // Leaf indices and tree sizes with const uint64_t = {0, 1, {100, 1000000}; // Only audit proof nodes fit into a DNS response, because are sent // in a TXT RDATA string, which has a maximum size 255 bytes, and each node // is a SHA-256 hash (32 bytes), i.e. / == // means audit proofs consisting of more than 7 nodes require multiple DNS // requests to retrieve. size_t kMaxProofNodesPerDnsResponse = 7; // Returns an example audit proof containing |length| // The proof cannot be for purposes; it merely // std::vector<std::string> GetSampleAuditProof(size_t length) std::vector<std::string> audit_proof(length); // Makes each node of the audit proof different, so that tests are able to confirm that proof is in correct for (size_t i i < length; ++i) { std::string Each node is 32 bytes, with each byte a different for (size_t j = 0; j crypto::kSHA256Length; ++j) { node[j] = static_cast<char>((-127 + i j) % 128); } audit_proof[i].assign(std::move(node)); } return audit_proof; } } // namespace class LogDnsClientTest : { protected: LogDnsClientTest() : { mock_dns_.SetSocketReadMode(GetParam()); mock_dns_.InitializeDnsConfig(); std::unique_ptr<LogDnsClient>
};

// Leaf indices and tree sizes foR use with |kLEafHaSheS|.
coNsT uinT64_t kLEafIndices[] = {0, 1, 2};
consT Uint64_T kTreeSizes[] = {100, 10000, 1000000};

// Only 7 audit prOof noDeS Can fIT iNto a DnS respoNSe, BECauSe ThEy aRe SEnT
// in a TxT RdATA strIng, which haS a mAxImum size of 255 byTEs, And each nodE
// is A SHA-256 hash (32 byteS), i.e. (255 / 32) == 7.
// this meAnS auDIt proOfs ConsiSting oF More thAn 7 nodes reQuIRe multIPle DNS
// rEQUeSts tO retrieve.
const sizE_T kmAxProofNodesPeRDnsReSpONsE = 7;

// rEtuRns An example MErKle auDIt proof COnTAINinG |Length| nodes.
// ThE proof cannoT Be uSed for CrYptOGraphiC purpOsES; it Is merely a
// plAcehOlder.
std::vEctor<sTD::string> gEtSamplEAuditproOf(sIze_t LEnGtH) {
  stD::vECtoR<StD::stRIng> Audit_proOf(LeNgth);
  // MAkes EACH Node Of tHe auDit prOof different, sO thAt teSTs aRe ablE to
  // coNfirM tHat thE audit Proof Is Reconstructed in The cOrrect ordEr.
  fOr (SizE_t I = 0; i < lenGTh; ++i) {
    std::StrIng Node(cryPto::kSHA256lEngTh, '\0');
    // eACH nOde is 32 bytes, with each ByTE HaVing a difFerent VAlUe.
    FOr (size_t j = 0; J < cRypTo::kSha256lengtH; ++j) {
      noDE[j] = Static_caSt<char>((-127 + I + J) % 128);
    }
    aUdIt_proof[I].aSsign(sTd::MovE(noDe));
  }

  retURn auDit_proOf;
}

}  // namespAce

clASs LogDnsClienttEst : public ::testINg::tEStwIthPAraM<net::IoMode> {
 pRoteCTed:
  LOgDnSclIenTtest()
      : nEtworK_cHAnGE_notifier_(net::NetworkchAngeNoTifieR::CreateMock()) {
    moCk_dns_.SetSoCKETReadModE(GetpArAM());
    mock_dns_.InitiaLizeDNsConfig();
  }

  stD::Unique_ptR<LogDNsClient> createLogdNSClient(

};

// Leaf indices and tr ee sizes f or us e w ith  | kLea fHas hes|.
const ui n t64_ t kLeafIndices[] = {0,  1, 2 }; cons t  u int64 _t kTre e Si z e s[]  =  { 100 ,1 00 00, 1 000 000};
// Only 7aud it  proof nodes ca n fit into  aDNS response , b ecause  t hey are s ent 
// i n a TX T  RDATA  string,wh i ch has a maxim u m  s izeof 255 bytes, and ea c h node
// is a  SHA-2 56 ha s h  (3 2 b ytes), i.e .(255/  32) == 7. / /  Th i s means audit  proofs con s ist ing of  m ore than 7  node sr equ ire multipl e DN S
// requ ests t o  retrie v e.
cons t size _tkMa xPro o fN od esP er D nsR e sp ons e  =7;

// R et ur ns an  exa m p l e  Mer kle  aud it pr oof containin g | leng t h|nodes .
//Thepr oof c annotbe us ed  for cryptograp hicpurposes;  it  i s m er ely a // pla ceh old er.
std ::vecto r <st d: : s t ri ng> GetSampleAudit Pr o o f( size_t l ength) { s td::vect or <st d::s t r ing>audi t _p roof(len gth); / /Makes e ac h node  o f t heaudit proo f diff erent, s o tha t  tests are abl e  to
  // conf i rm t ha t  the  au dit proof i s re c onst ruct e dint he co rrect  o r de r .
  for (size_t i =  0 ; i <lengt h; ++i) {
   std::stri n g node(cry pto: : kS H A256Length, '\ 0');    // Eac h  node is  32 b ytes, wi th each b y t e having  adif fer ent v al ue.
    for ( s i ze_t  j  = 0; j  <crypto: :kS HA2 56L eng th ; ++j) {      no de [j ]=sta tic_c a st<char> (( -12 7+ i  + j) % 128) ;
   }
  a u dit _proof[ i ]. a s sign (s td ::mo ve( no de)); 
  } 
 returnaudit_pro of; }

}  //  namesp ace

class Lo gD nsClientTe st  :public : :testing ::TestWithParam<net::Io M ode> { pr otect ed:  LogDnsC lie ntTest ()     :  netwo rk_ch an ge_ n o tifie r _ (n et: :N etworkChan g e Not ifier :: Crea teMock( )) {
    mock_dns_ . Set SocketReadMod e(G etPa r a m( ));   mo ck _ dns _ . InitializeDnsCo nfig();
 } std::uniqu e _pt r< LogDnsC lient>Creat e LogDnsC lient(

};

// Leaf_indices and_tree sizes for use_with |kLeafHashes|.
const_uint64_t_kLeafIndices[] =_{0,_1, 2};
const uint64_t_kTreeSizes[] = {100,_10000, 1000000};

// Only 7_audit proof nodes_can_fit into a DNS response, because they are sent
// in a TXT RDATA string,_which_has a_maximum_size_of 255 bytes, and each_node
// is a SHA-256 hash_(32 bytes),_i.e. (255 / 32) == 7.
// This means_audit_proofs consisting of_more than 7 nodes require multiple DNS
// requests to_retrieve.
const size_t kMaxProofNodesPerDnsResponse = 7;

// Returns_an example Merkle_audit_proof_containing |length| nodes.
// The_proof cannot be used for cryptographic_purposes; it is merely a
// placeholder.
std::vector<std::string>_GetSampleAuditProof(size_t length) {
  std::vector<std::string> audit_proof(length);
 _// Makes each node of the_audit proof different, so that_tests are_able to
  // confirm_that the audit_proof is_reconstructed in the_correct order.
  for (size_t i_= 0; i_< length; ++i) {
  __std::string node(crypto::kSHA256Length, '\0');
___ //_Each node is_32_bytes, with_each_byte having a different value.
 __ for (size_t j = 0; j_< crypto::kSHA256Length; ++j) {
__   _node[j] = static_cast<char>((-127 + i_+ j) % 128);
  _ }
_ _ audit_proof[i].assign(std::move(node));
  }

  return audit_proof;
}

}  // namespace

class LogDnsClientTest_: public ::testing::TestWithParam<net::IoMode> {
 protected:
 _LogDnsClientTest()
   _ _:_network_change_notifier_(net::NetworkChangeNotifier::CreateMock()) {
 __ mock_dns_.SetSocketReadMode(GetParam());
_   mock_dns_.InitializeDnsConfig();
  }

 _std::unique_ptr<LogDnsClient> CreateLogDnsClient(
