////////////////////////////////////////////////////////////////////////////////
/// 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 "IResearchQueryCommon.h"

#include "IResearch/IResearchView.h"
#include "Transaction/StandaloneContext.h"
#include "Utils/OperationOptions.h"
#include "Utils/SingleCollectionTransaction.h"
#include "VocBase/LogicalCollection.h"

#include <velocypack/Iterator.h>

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

namespace {

static const VPackBuilder systemDatabaseBuilder = dbArgsBuilder();
static const VPackSlice   systemDatabaseArgs = systemDatabaseBuilder.slice();
// -----------------------------------------------------------------------------
// --SECTION--                                                 setup / tear-down
// -----------------------------------------------------------------------------

class IResearchQueryExistsTest : public IResearchQueryTest {};
}

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

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

TEST_F(IResearchQueryExistsTest, test) {
  TRI_vocbase_t vocbase(TRI_vocbase_type_e::TRI_VOCBASE_TYPE_NORMAL, testDBInfo(server.server()));
  std::vector<arangodb::velocypack::Builder> insertedDocs;
  arangodb::LogicalView* view;

  // create collection0
  {
    auto createJson = VPackParser::fromJson("{ \"name\": \"testCollection0\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_NE(nullptr, collection);

    std::vector<std::shared_ptr<arangodb::velocypack::Builder>> docs {
      VPackParser::fromJson("{ \"seq\": -6, \"value\": null }"),
      VPackParser::fromJson("{ \"seq\": -5, \"value\": true }"),
      VPackParser::fromJson("{ \"seq\": -4, \"value\": \"abc\" }"),
      VPackParser::fromJson("{ \"seq\": -3, \"value\": 3.14 }"),
      VPackParser::fromJson("{ \"seq\": -2, \"value\": [ 1, \"abc\" ] }"),
      VPackParser::fromJson("{ \"seq\": -1, \"value\": { \"a\": 7, \"b\": \"c\" } }"),
    };

    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 = VPackParser::fromJson("{ \"name\": \"testCollection1\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_NE(nullptr, collection);

    irs::utf8_path resource;
    resource/=irs::string_ref(arangodb::tests::testResourceDir);
    resource/=irs::string_ref("simple_sequential.json");

    auto builder = arangodb::basics::VelocyPackHelper::velocyPackFromFile(resource.utf8());
    auto slice = builder.slice();
    ASSERT_TRUE(slice.isArray());

    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 (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto res = trx.insert(collection->name(), itr.value(), options);
      EXPECT_TRUE(res.ok());
      insertedDocs.emplace_back(res.slice().get("new"));
    }

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

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

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

    auto updateJson = VPackParser::fromJson(
      "{ \"links\": {"
        "\"testCollection0\": { \"includeAllFields\": true, \"trackListPositions\": true, \"storeValues\": \"id\"},"
        "\"testCollection1\": { \"includeAllFields\": true, \"storeValues\": \"id\" }"
      "}}"
    );
    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_EQ(2, cids.size());
    EXPECT_TRUE(arangodb::tests::executeQuery(vocbase, "FOR d IN testView SEARCH 1 ==1 OPTIONS { waitForSync: true } RETURN d").result.ok()); // commit
  }

  // test non-existent (any)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.missing) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (any) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['missing']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (bool)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (bool) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (boolean)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (boolean) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (numeric)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (numeric) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (null)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (null) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (string)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.seq, 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (string) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['seq'], 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (text analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.seq, 'analyzer', 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (text analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.seq, 'analyzer'), 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (analyzer) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['seq'], 'analyzer'), 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (array)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value[2]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (array) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'][2]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (object)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value.d) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (object) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']['d']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[0].slice(),
      insertedDocs[1].slice(),
      insertedDocs[2].slice(),
      insertedDocs[3].slice(),
      insertedDocs[4].slice(),
      insertedDocs[5].slice(),
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[0].slice(),
      insertedDocs[1].slice(),
      insertedDocs[2].slice(),
      insertedDocs[3].slice(),
      insertedDocs[4].slice(),
      insertedDocs[5].slice(),
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (bool)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (bool) with bound params
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\" }")
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (bool) with bound view name
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN  @@testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\", \"@testView\": \"testView\" }")
    );

    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (bool) with invalid bound view name
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN  @@testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\", \"@testView\": \"invlaidViewName\" }")
    );

    ASSERT_TRUE(result.result.is(TRI_ERROR_ARANGO_DATA_SOURCE_NOT_FOUND));
  }

  // test existent (bool) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (boolean)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (boolean) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[1].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (numeric)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[3].slice(),
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (numeric) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[3].slice(),
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (numeric) via [], limit  5
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[3].slice(),
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice()
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq LIMIT 5 RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (null)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[0].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (null) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[0].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (string)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.value, 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any string)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.value, 'string'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any string)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any string) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['value'], 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['value'], 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (identity analyzer) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[2].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (array)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[4].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value[1]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (array) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[4].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'][1]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (object)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[5].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value.b) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (object) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[5].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']['b']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }
}

TEST_F(IResearchQueryExistsTest, StoreMaskPartially) {
  TRI_vocbase_t vocbase(TRI_vocbase_type_e::TRI_VOCBASE_TYPE_NORMAL, testDBInfo(server.server()));
  std::vector<arangodb::velocypack::Builder> insertedDocs;
  arangodb::LogicalView* view;

  // create collection0
  {
    auto createJson = VPackParser::fromJson("{ \"name\": \"testCollection0\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_NE(nullptr, collection);

    std::vector<std::shared_ptr<arangodb::velocypack::Builder>> docs {
      VPackParser::fromJson("{ \"seq\": -6, \"value\": null }"),
      VPackParser::fromJson("{ \"seq\": -5, \"value\": true }"),
      VPackParser::fromJson("{ \"seq\": -4, \"value\": \"abc\" }"),
      VPackParser::fromJson("{ \"seq\": -3, \"value\": 3.14 }"),
      VPackParser::fromJson("{ \"seq\": -2, \"value\": [ 1, \"abc\" ] }"),
      VPackParser::fromJson("{ \"seq\": -1, \"value\": { \"a\": 7, \"b\": \"c\" } }"),
    };

    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 = VPackParser::fromJson("{ \"name\": \"testCollection1\" }");
    auto collection = vocbase.createCollection(createJson->slice());
    ASSERT_NE(nullptr, collection);

    irs::utf8_path resource;
    resource/=irs::string_ref(arangodb::tests::testResourceDir);
    resource/=irs::string_ref("simple_sequential.json");

    auto builder = arangodb::basics::VelocyPackHelper::velocyPackFromFile(resource.utf8());
    auto slice = builder.slice();
    ASSERT_TRUE(slice.isArray());

    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 (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto res = trx.insert(collection->name(), itr.value(), options);
      EXPECT_TRUE(res.ok());
      insertedDocs.emplace_back(res.slice().get("new"));
    }

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

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

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

    auto updateJson = VPackParser::fromJson(
      "{ \"links\": {"
        "\"testCollection0\": { \"includeAllFields\": true, \"trackListPositions\": true },"
        "\"testCollection1\": { \"includeAllFields\": true, \"storeValues\": \"id\" }"
      "}}"
    );
    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_EQ(2, cids.size());
    EXPECT_TRUE(arangodb::tests::executeQuery(vocbase, "FOR d IN testView SEARCH 1 ==1 OPTIONS { waitForSync: true } RETURN d").result.ok()); // commit
  }

  // test non-existent (any)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.missing) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (any) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['missing']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (bool)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (bool) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (boolean)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (boolean) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (numeric)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (numeric) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (null)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.name, 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (null) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['name'], 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (string)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.seq, 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (string) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['seq'], 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (text analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.seq, 'analyzer', 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (text analyzer)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.seq, 'analyzer'), 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (analyzer) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['seq'], 'analyzer'), 'text_en') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (array)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value[2]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (array) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'][2]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (object)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value.d) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test non-existent (object) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']['d']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (any) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (bool)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (bool) with bound params
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\" }")
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (bool) with bound view name
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN  @@testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\", \"@testView\": \"testView\" }")
    );

    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (bool) with invalid bound view name
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN  @@testView SEARCH EXISTS(d.value, @type) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d",
      VPackParser::fromJson("{ \"type\" : \"bool\", \"@testView\": \"invlaidViewName\" }")
    );

    ASSERT_TRUE(result.result.is(TRI_ERROR_ARANGO_DATA_SOURCE_NOT_FOUND));
  }

  // test existent (bool) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'bool') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (boolean)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (boolean) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'boolean') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (numeric)
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (numeric) via []
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
      insertedDocs[11].slice(),
      insertedDocs[12].slice(),
      insertedDocs[13].slice(),
      insertedDocs[14].slice(),
      insertedDocs[15].slice(),
      insertedDocs[16].slice(),
      insertedDocs[17].slice(),
      insertedDocs[18].slice(),
      insertedDocs[19].slice(),
      insertedDocs[20].slice(),
      insertedDocs[21].slice(),
      insertedDocs[22].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (numeric) via [], limit  5
  {
    std::vector<arangodb::velocypack::Slice> expected = {
      insertedDocs[6].slice(),
      insertedDocs[7].slice(),
      insertedDocs[8].slice(),
      insertedDocs[9].slice(),
      insertedDocs[10].slice(),
    };
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'numeric') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq LIMIT 5 RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    size_t i = 0;

    for (arangodb::velocypack::ArrayIterator itr(slice); itr.valid(); ++itr) {
      auto const resolved = itr.value().resolveExternals();
      EXPECT_TRUE(i < expected.size());
      EXPECT_EQ(0, arangodb::basics::VelocyPackHelper::compare(expected[i++], resolved, true));
    }

    EXPECT_EQ(i, expected.size());
  }

  // test existent (null)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (null) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'null') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (string)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.value, 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (any string)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d.value, 'string'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (any string)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (any string) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'string') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value, 'analyzer') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['value'], 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH ANALYZER(EXISTS(d['value'], 'analyzer'), 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (identity analyzer) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'], 'analyzer', 'identity') SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (array)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value[1]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (array) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value'][1]) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (object)
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d.value.b) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }

  // test existent (object) via []
  {
    auto result = arangodb::tests::executeQuery(
      vocbase,
      "FOR d IN testView SEARCH EXISTS(d['value']['b']) SORT BM25(d) ASC, TFIDF(d) DESC, d.seq RETURN d"
    );
    ASSERT_TRUE(result.result.ok());
    auto slice = result.data->slice();
    EXPECT_TRUE(slice.isArray());
    EXPECT_EQ(0, slice.length());
  }
}