////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2017 ArangoDB GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Andrey Abramov
/// @author Vasiliy Nabatchikov
////////////////////////////////////////////////////////////////////////////////

#include "common.h"
#include "gtest/gtest.h"

#include "../Mocks/StorageEngineMock.h"

#if USE_ENTERPRISE
#include "Enterprise/Ldap/LdapFeature.h"
#endif

#include "3rdParty/iresearch/tests/tests_config.hpp"
#include "Aql/AqlFunctionFeature.h"
#include "Aql/Ast.h"
#include "Aql/OptimizerRulesFeature.h"
#include "Aql/Query.h"
#include "Basics/VelocyPackHelper.h"
#include "GeneralServer/AuthenticationFeature.h"
#include "IResearch/IResearchAnalyzerFeature.h"
#include "IResearch/IResearchCommon.h"
#include "IResearch/IResearchFeature.h"
#include "IResearch/IResearchFilterFactory.h"
#include "IResearch/IResearchView.h"
#include "Logger/LogTopic.h"
#include "Logger/Logger.h"
#include "RestServer/AqlFeature.h"
#include "RestServer/DatabaseFeature.h"
#include "RestServer/DatabasePathFeature.h"
#include "RestServer/QueryRegistryFeature.h"
#include "RestServer/FlushFeature.h"
#include "RestServer/SystemDatabaseFeature.h"
#include "RestServer/TraverserEngineRegistryFeature.h"
#include "RestServer/ViewTypesFeature.h"
#include "Sharding/ShardingFeature.h"
#include "StorageEngine/EngineSelectorFeature.h"
#include "Transaction/StandaloneContext.h"
#include "Utils/OperationOptions.h"
#include "Utils/SingleCollectionTransaction.h"
#include "V8/v8-globals.h"
#include "VocBase/LogicalCollection.h"
#include "VocBase/LogicalView.h"
#include "VocBase/ManagedDocumentResult.h"

#include "IResearch/VelocyPackHelper.h"
#include "analysis/analyzers.hpp"
#include "analysis/token_attributes.hpp"
#include "utils/utf8_path.hpp"

#include <velocypack/Iterator.h>

extern const char* ARGV0;  // defined in main.cpp

namespace {

// -----------------------------------------------------------------------------
// --SECTION--                                                 setup / tear-down
// -----------------------------------------------------------------------------

class IResearchQueryBooleanTermTest : public ::testing::Test {
 protected:
  StorageEngineMock engine;
  arangodb::application_features::ApplicationServer server;
  std::unique_ptr<TRI_vocbase_t> system;
  std::vector<std::pair<arangodb::application_features::ApplicationFeature*, bool>> features;

  IResearchQueryBooleanTermTest() : engine(server), server(nullptr, nullptr) {
    arangodb::EngineSelectorFeature::ENGINE = &engine;

    arangodb::tests::init(true);

    // suppress INFO {authentication} Authentication is turned on (system only), authentication for unix sockets is turned on
    // suppress WARNING {authentication} --server.jwt-secret is insecure. Use --server.jwt-secret-keyfile instead
    arangodb::LogTopic::setLogLevel(arangodb::Logger::AUTHENTICATION.name(),
                                    arangodb::LogLevel::ERR);

    // suppress log messages since tests check error conditions
    arangodb::LogTopic::setLogLevel(arangodb::Logger::AQL.name(), arangodb::LogLevel::ERR);  // suppress WARNING {aql} Suboptimal AqlItemMatrix index lookup:
    arangodb::LogTopic::setLogLevel(arangodb::Logger::FIXME.name(), arangodb::LogLevel::ERR);  // suppress WARNING DefaultCustomTypeHandler called
    arangodb::LogTopic::setLogLevel(arangodb::iresearch::TOPIC.name(),
                                    arangodb::LogLevel::FATAL);
    irs::logger::output_le(iresearch::logger::IRL_FATAL, stderr);

    // setup required application features
    features.emplace_back(new arangodb::FlushFeature(server), false);
    features.emplace_back(new arangodb::ViewTypesFeature(server), true);
    features.emplace_back(new arangodb::AuthenticationFeature(server), true);
    features.emplace_back(new arangodb::DatabasePathFeature(server), false);
    features.emplace_back(new arangodb::DatabaseFeature(server), false);
    features.emplace_back(new arangodb::ShardingFeature(server), false);
    features.emplace_back(new arangodb::QueryRegistryFeature(server), false);  // must be first
    arangodb::application_features::ApplicationServer::server->addFeature(
        features.back().first);  // need QueryRegistryFeature feature to be added now in order to create the system database
    system = irs::memory::make_unique<TRI_vocbase_t>(TRI_vocbase_type_e::TRI_VOCBASE_TYPE_NORMAL,
                                                     0, TRI_VOC_SYSTEM_DATABASE);
    features.emplace_back(new arangodb::SystemDatabaseFeature(server, system.get()),
                          false);  // required for IResearchAnalyzerFeature
    features.emplace_back(new arangodb::TraverserEngineRegistryFeature(server), false);  // must be before AqlFeature
    features.emplace_back(new arangodb::AqlFeature(server), true);
    features.emplace_back(new arangodb::aql::OptimizerRulesFeature(server), true);
    features.emplace_back(new arangodb::aql::AqlFunctionFeature(server), true);  // required for IResearchAnalyzerFeature
    features.emplace_back(new arangodb::iresearch::IResearchAnalyzerFeature(server), true);
    features.emplace_back(new arangodb::iresearch::IResearchFeature(server), true);

#if USE_ENTERPRISE
    features.emplace_back(new arangodb::LdapFeature(server),
                          false);  // required for AuthenticationFeature with USE_ENTERPRISE
#endif

    for (auto& f : features) {
      arangodb::application_features::ApplicationServer::server->addFeature(f.first);
    }

    for (auto& f : features) {
      f.first->prepare();
    }

    for (auto& f : features) {
      if (f.second) {
        f.first->start();
      }
    }

    auto* dbPathFeature =
        arangodb::application_features::ApplicationServer::getFeature<arangodb::DatabasePathFeature>(
            "DatabasePath");
    arangodb::tests::setDatabasePath(*dbPathFeature);  // ensure test data is stored in a unique directory
  }

  ~IResearchQueryBooleanTermTest() {
    system.reset();  // destroy before reseting the 'ENGINE'
    arangodb::AqlFeature(server).stop();  // unset singleton instance
    arangodb::LogTopic::setLogLevel(arangodb::iresearch::TOPIC.name(),
                                    arangodb::LogLevel::DEFAULT);
    arangodb::LogTopic::setLogLevel(arangodb::Logger::FIXME.name(),
                                    arangodb::LogLevel::DEFAULT);
    arangodb::LogTopic::setLogLevel(arangodb::Logger::AQL.name(), arangodb::LogLevel::DEFAULT);
    arangodb::application_features::ApplicationServer::server = nullptr;
    arangodb::EngineSelectorFeature::ENGINE = nullptr;

    // destroy application features
    for (auto& f : features) {
      if (f.second) {
        f.first->stop();
      }
    }

    for (auto& f : features) {
      f.first->unprepare();
    }

    arangodb::LogTopic::setLogLevel(arangodb::Logger::AUTHENTICATION.name(),
                                    arangodb::LogLevel::DEFAULT);
  }
};  // IResearchQuerySetup

}  // namespace

// -----------------------------------------------------------------------------
// --SECTION--                                                        test suite
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief setup
////////////////////////////////////////////////////////////////////////////////

TEST_F(IResearchQueryBooleanTermTest, test) {
  // ==, !=, <, <=, >, >=, range
  TRI_vocbase_t vocbase(TRI_vocbase_type_e::TRI_VOCBASE_TYPE_NORMAL, 1,
                        "testVocbase");
  arangodb::LogicalView* view{};
  std::vector<arangodb::velocypack::Builder> insertedDocs;

  // create collection0
  {
    auto createJson = arangodb::velocypack::Parser::fromJson(
        "{ \"name\": \"testCollection0\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_TRUE((nullptr != collection));

    std::vector<std::shared_ptr<arangodb::velocypack::Builder>> docs{
        arangodb::velocypack::Parser::fromJson("{ \"seq\": -7 }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -6, \"value\": false}"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -5, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -4, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -3, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -2, \"value\": false}"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": -1, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 0, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 1, \"value\": false}")};

    arangodb::OperationOptions options;
    options.returnNew = true;
    arangodb::SingleCollectionTransaction trx(arangodb::transaction::StandaloneContext::Create(vocbase),
                                              *collection,
                                              arangodb::AccessMode::Type::WRITE);
    EXPECT_TRUE((trx.begin().ok()));

    for (auto& entry : docs) {
      auto res = trx.insert(collection->name(), entry->slice(), options);
      EXPECT_TRUE((res.ok()));
      insertedDocs.emplace_back(res.slice().get("new"));
    }

    EXPECT_TRUE((trx.commit().ok()));
  }

  // create collection1
  {
    auto createJson = arangodb::velocypack::Parser::fromJson(
        "{ \"name\": \"testCollection1\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_TRUE((nullptr != collection));

    std::vector<std::shared_ptr<arangodb::velocypack::Builder>> docs{
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 2, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 3, \"value\": false}"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 4, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 5, \"value\": true }"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 6, \"value\": false}"),
        arangodb::velocypack::Parser::fromJson(
            "{ \"seq\": 7, \"value\": false}"),
        arangodb::velocypack::Parser::fromJson("{ \"seq\": 8 }")};

    arangodb::OperationOptions options;
    options.returnNew = true;
    arangodb::SingleCollectionTransaction trx(arangodb::transaction::StandaloneContext::Create(vocbase),
                                              *collection,
                                              arangodb::AccessMode::Type::WRITE);
    EXPECT_TRUE((trx.begin().ok()));

    for (auto& entry : docs) {
      auto res = trx.insert(collection->name(), entry->slice(), options);
      ASSERT_TRUE((res.ok()));
      insertedDocs.emplace_back(res.slice().get("new"));
    }

    EXPECT_TRUE((trx.commit().ok()));
  }

  // create view
  {
    auto createJson = arangodb::velocypack::Parser::fromJson(
        "{ \"name\": \"testView\", \"type\": \"arangosearch\" }");
    auto logicalView = vocbase.createView(createJson->slice());
    ASSERT_TRUE((false == !logicalView));

    view = logicalView.get();
    ASSERT_TRUE(nullptr != view);
    auto* impl = dynamic_cast<arangodb::iresearch::IResearchView*>(view);
    ASSERT_TRUE((false == !impl));

    auto updateJson = arangodb::velocypack::Parser::fromJson(
        "{ \"links\": {"
        "\"testCollection0\": { \"includeAllFields\": true, "
        "\"trackListPositions\": true },"
        "\"testCollection1\": { \"includeAllFields\": true }"
        "}}");
    EXPECT_TRUE((impl->properties(updateJson->slice(), true).ok()));
    std::set<TRI_voc_cid_t> cids;
    impl->visitCollections([&cids](TRI_voc_cid_t cid) -> bool {
      cids.emplace(cid);
      return true;
    });
    EXPECT_TRUE((2 == cids.size()));
    EXPECT_TRUE(
        (arangodb::tests::executeQuery(vocbase,
                                       "FOR d IN testView SEARCH 1 ==1 OPTIONS "
                                       "{ waitForSync: true } RETURN d")
             .result.ok()));  // commit
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- ==
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value == true, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      ASSERT_TRUE(docSlice.isObject());
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      ASSERT_TRUE(keySlice.isNumber());
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value == false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value == false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value == false, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value == false SORT BM25(d), TFIDF(d), "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- !=
  // -----------------------------------------------------------------------------

  // invalid type
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;

    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const keySlice = docSlice.get("seq");
      auto const fieldSlice = docSlice.get("value");

      if (!fieldSlice.isNone() &&
          (fieldSlice.isString() && "true" == arangodb::iresearch::getStringRef(fieldSlice))) {
        continue;
      }

      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // invalid type
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;

    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const keySlice = docSlice.get("seq");
      auto const fieldSlice = docSlice.get("value");

      if (!fieldSlice.isNone() &&
          (fieldSlice.isString() && "false" == arangodb::iresearch::getStringRef(fieldSlice))) {
        continue;
      }

      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // invalid type
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;

    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const keySlice = docSlice.get("seq");
      auto const fieldSlice = docSlice.get("value");

      if (!fieldSlice.isNone() &&
          (fieldSlice.isNumber() && 0. == fieldSlice.getNumber<double>())) {
        continue;
      }

      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // invalid type
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const keySlice = docSlice.get("seq");
      auto const fieldSlice = docSlice.get("value");

      if (!fieldSlice.isNone() &&
          (fieldSlice.isNumber() && 1. == fieldSlice.getNumber<double>())) {
        continue;
      }

      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // invalid type
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const keySlice = docSlice.get("seq");
      auto const fieldSlice = docSlice.get("value");

      if (!fieldSlice.isNone() && fieldSlice.isNull()) {
        continue;
      }

      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value != true, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");

      if (!valueSlice.isNone() && (valueSlice.isBoolean() && valueSlice.getBoolean())) {
        continue;
      }

      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value != false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");

      if (!valueSlice.isNone() && (valueSlice.isBoolean() && !valueSlice.getBoolean())) {
        continue;
      }

      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value != false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value != false, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");

      if (!valueSlice.isNone() && (valueSlice.isBoolean() && !valueSlice.getBoolean())) {
        continue;
      }

      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value != false SORT BM25(d), TFIDF(d), "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- <
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value < true, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value < false, unordered
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value < false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value < true, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value < true SORT BM25(d), TFIDF(d), d.seq "
        "DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- <=
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value <= true, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value <= false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value <= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value <= true, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value <= true SORT BM25(d), TFIDF(d), "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- >
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > true, unordered
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value > false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value > false, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > false SORT BM25(d), TFIDF(d), "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION-- >=
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= 'true' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= 'false' RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= 0 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= 1 RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= null RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value >= true, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value >= false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value >= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value >= false, BM25(), TFIDF(), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= false SORT BM25(d), TFIDF(d), "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION--                                                      Range (>, <)
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value > "
                                      "'false' and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > 0 and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > null and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // empty range
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > true and d.value < false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > false AND d.value < true
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > false and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > true AND d.value < true
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > true and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // -----------------------------------------------------------------------------
  // --SECTION--                                                     Range (>=, <)
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "'false' and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= 0 and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= null and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // empty range
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "true and d.value < false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value >= true AND d.value < true
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= true and d.value < true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value >= false AND d.value < true, BM25(d), TFIDF(d), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= false AND d.value < true SORT "
        "BM25(d), TFIDF(d), d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION--                                                     Range (>, <=)
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value > "
                                      "'false' and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > 0 and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > null and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > false AND d.value <= false
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value > "
                                      "false and d.value <= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // empty range
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value > true "
                                      "and d.value <= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > true AND d.value <= true
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > true and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value > false AND d.value <= true, BM25(d), TFIDF(d), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value > false AND d.value <= true SORT "
        "BM25(d), TFIDF(d), d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION--                                                    Range (>=, <=)
  // -----------------------------------------------------------------------------

  // invalid type
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "'false' and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= 0 and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // invalid type
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "null and d.value <= true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // empty range
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "true and d.value <= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value >= false AND d.value <= false, unordered
  {
    std::map<size_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value >= "
                                      "false and d.value <= false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto const keySlice = resolved.get("seq");
      auto const key = keySlice.getNumber<ptrdiff_t>();

      auto expectedDoc = expectedDocs.find(key);
      ASSERT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value >= true AND d.value <= true, d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean() || !valueSlice.getBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= true AND d.value <= true SORT "
        "d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // d.value >= false AND d.value <= true, BM25(d), TFIDF(d), d.seq DESC
  {
    std::map<ptrdiff_t, arangodb::velocypack::Slice> expectedDocs;
    for (auto const& doc : insertedDocs) {
      arangodb::velocypack::Slice docSlice = doc.slice().resolveExternals();
      auto const valueSlice = docSlice.get("value");
      if (!valueSlice.isBoolean()) {
        continue;
      }
      auto const keySlice = docSlice.get("seq");
      expectedDocs.emplace(keySlice.getNumber<ptrdiff_t>(), docSlice);
    }

    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value >= false AND d.value <= true SORT "
        "BM25(d), TFIDF(d), d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());

    auto expectedDoc = expectedDocs.rbegin();
    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      ++expectedDoc;
    }
    EXPECT_TRUE(expectedDoc == expectedDocs.rend());
  }

  // -----------------------------------------------------------------------------
  // --SECTION--                                                    Range (>=, <=)
  // -----------------------------------------------------------------------------

  // empty range
  // (will be converted to d.value >= 1 AND d.value <= 0)
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value IN true..false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // empty range
  // (will be converted to d.seq >= 1 AND d.seq <= 0)
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.seq IN true..false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());

    for (auto const actualDoc : resultIt) {
      UNUSED(actualDoc);
      EXPECT_TRUE(false);
    }
  }

  // d.value >= false AND d.value <= false, unordered
  // (will be converted to d.value >= 0 AND d.value <= 0)
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.value IN false..false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());
    EXPECT_TRUE(!resultIt.valid());
  }

  // d.seq >= false AND d.seq <= false, unordered
  // (will be converted to d.seq >= 0 AND d.seq <= 0)
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.seq IN false..false RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(1 == resultIt.size());
    EXPECT_TRUE(resultIt.valid());

    auto const resolved = resultIt.value().resolveExternals();
    auto expectedDoc = insertedDocs[7].slice();  // seq == 0
    EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc, resolved, true));

    resultIt.next();
    EXPECT_TRUE(!resultIt.valid());
  }

  // d.value >= true AND d.value <= true, d.seq DESC
  // (will be converted to d.value >= 0 AND d.value <= 0)
  {
    auto queryResult =
        arangodb::tests::executeQuery(vocbase,
                                      "FOR d IN testView SEARCH d.value IN "
                                      "true..true SORT d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());
    EXPECT_TRUE(!resultIt.valid());
  }

  // d.seq >= true AND d.seq <= true, unordered
  // (will be converted to d.seq >= 1 AND d.seq <= 1)
  {
    std::unordered_map<size_t, arangodb::velocypack::Slice> expectedDocs{
        {1, insertedDocs[8].slice()}  // seq == 1
    };

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.seq IN true..true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());
    EXPECT_TRUE(resultIt.valid());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto key = resolved.get("seq");
      auto expectedDoc = expectedDocs.find(key.getNumber<size_t>());
      EXPECT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }

  // d.value >= false AND d.value <= true, BM25(d), TFIDF(d), d.seq DESC
  // (will be converted to d.value >= 0 AND d.value <= 0)
  {
    auto queryResult = arangodb::tests::executeQuery(
        vocbase,
        "FOR d IN testView SEARCH d.value IN false..true SORT BM25(d), "
        "TFIDF(d), d.seq DESC RETURN d");
    ASSERT_TRUE(queryResult.result.ok());
    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(0 == resultIt.size());
    EXPECT_TRUE(!resultIt.valid());
  }

  // d.seq >= false AND d.seq <= true, unordered
  // (will be converted to d.seq >= 0 AND d.seq <= 1)
  {
    std::unordered_map<size_t, arangodb::velocypack::Slice> expectedDocs{
        {0, insertedDocs[7].slice()},  // seq == 0
        {1, insertedDocs[8].slice()}   // seq == 1
    };

    auto queryResult = arangodb::tests::executeQuery(
        vocbase, "FOR d IN testView SEARCH d.seq IN false..true RETURN d");
    ASSERT_TRUE(queryResult.result.ok());

    auto result = queryResult.data->slice();
    EXPECT_TRUE(result.isArray());

    arangodb::velocypack::ArrayIterator resultIt(result);
    EXPECT_TRUE(expectedDocs.size() == resultIt.size());
    EXPECT_TRUE(resultIt.valid());

    for (auto const actualDoc : resultIt) {
      auto const resolved = actualDoc.resolveExternals();
      auto key = resolved.get("seq");
      auto expectedDoc = expectedDocs.find(key.getNumber<size_t>());
      EXPECT_TRUE(expectedDoc != expectedDocs.end());
      EXPECT_TRUE(0 == arangodb::basics::VelocyPackHelper::compare(expectedDoc->second,
                                                                   resolved, true));
      expectedDocs.erase(expectedDoc);
    }
    EXPECT_TRUE(expectedDocs.empty());
  }
}