memgraph/tests/unit/query_expression_evaluator.cpp

#include <cmath>
#include <iterator>
#include <memory>
#include <unordered_map>
#include <vector>

#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include "query/context.hpp"
#include "query/frontend/ast/ast.hpp"
#include "query/frontend/opencypher/parser.hpp"
#include "query/interpret/awesome_memgraph_functions.hpp"
#include "query/interpret/eval.hpp"
#include "query/interpret/frame.hpp"
#include "query/path.hpp"
#include "storage/v2/storage.hpp"
#include "utils/string.hpp"

#include "query_common.hpp"

using namespace query;
using query::test_common::ToIntList;
using testing::ElementsAre;
using testing::UnorderedElementsAre;

namespace {

class ExpressionEvaluatorTest : public ::testing::Test {
 protected:
  storage::Storage db;
  storage::Storage::Accessor storage_dba{db.Access()};
  query::DbAccessor dba{&storage_dba};

  AstStorage storage;
  utils::MonotonicBufferResource mem{1024};
  EvaluationContext ctx{&mem};
  SymbolTable symbol_table;

  Frame frame{128};
  ExpressionEvaluator eval{&frame, symbol_table, ctx, &dba, storage::View::OLD};

  Identifier *CreateIdentifierWithValue(std::string name,
                                        const TypedValue &value) {
    auto id = storage.Create<Identifier>(name, true);
    auto symbol = symbol_table.CreateSymbol(name, true);
    id->MapTo(symbol);
    frame[symbol] = value;
    return id;
  }

  template <class TExpression>
  auto Eval(TExpression *expr) {
    ctx.properties = NamesToProperties(storage.properties_, &dba);
    ctx.labels = NamesToLabels(storage.labels_, &dba);
    auto value = expr->Accept(eval);
    EXPECT_EQ(value.GetMemoryResource(), &mem)
        << "ExpressionEvaluator must use the MemoryResource from "
           "EvaluationContext for allocations!";
    return value;
  }
};

TEST_F(ExpressionEvaluatorTest, OrOperator) {
  auto *op =
      storage.Create<OrOperator>(storage.Create<PrimitiveLiteral>(true),
                                 storage.Create<PrimitiveLiteral>(false));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<OrOperator>(storage.Create<PrimitiveLiteral>(true),
                                  storage.Create<PrimitiveLiteral>(true));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, XorOperator) {
  auto *op =
      storage.Create<XorOperator>(storage.Create<PrimitiveLiteral>(true),
                                  storage.Create<PrimitiveLiteral>(false));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<XorOperator>(storage.Create<PrimitiveLiteral>(true),
                                   storage.Create<PrimitiveLiteral>(true));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), false);
}

TEST_F(ExpressionEvaluatorTest, AndOperator) {
  auto *op =
      storage.Create<AndOperator>(storage.Create<PrimitiveLiteral>(true),
                                  storage.Create<PrimitiveLiteral>(true));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<AndOperator>(storage.Create<PrimitiveLiteral>(false),
                                   storage.Create<PrimitiveLiteral>(true));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), false);
}

TEST_F(ExpressionEvaluatorTest, AndOperatorShortCircuit) {
  {
    auto *op =
        storage.Create<AndOperator>(storage.Create<PrimitiveLiteral>(false),
                                    storage.Create<PrimitiveLiteral>(5));
    auto value = Eval(op);
    EXPECT_EQ(value.ValueBool(), false);
  }
  {
    auto *op =
        storage.Create<AndOperator>(storage.Create<PrimitiveLiteral>(5),
                                    storage.Create<PrimitiveLiteral>(false));
    // We are evaluating left to right, so we don't short circuit here and
    // raise due to `5`. This differs from neo4j, where they evaluate both
    // sides and return `false` without checking for type of the first
    // expression.
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
}

TEST_F(ExpressionEvaluatorTest, AndOperatorNull) {
  {
    // Null doesn't short circuit
    auto *op = storage.Create<AndOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(5));
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
  {
    auto *op = storage.Create<AndOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(true));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    auto *op = storage.Create<AndOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(false));
    auto value = Eval(op);
    ASSERT_TRUE(value.IsBool());
    EXPECT_EQ(value.ValueBool(), false);
  }
}

TEST_F(ExpressionEvaluatorTest, AdditionOperator) {
  auto *op = storage.Create<AdditionOperator>(
      storage.Create<PrimitiveLiteral>(2), storage.Create<PrimitiveLiteral>(3));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), 5);
}

TEST_F(ExpressionEvaluatorTest, SubtractionOperator) {
  auto *op = storage.Create<SubtractionOperator>(
      storage.Create<PrimitiveLiteral>(2), storage.Create<PrimitiveLiteral>(3));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), -1);
}

TEST_F(ExpressionEvaluatorTest, MultiplicationOperator) {
  auto *op = storage.Create<MultiplicationOperator>(
      storage.Create<PrimitiveLiteral>(2), storage.Create<PrimitiveLiteral>(3));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), 6);
}

TEST_F(ExpressionEvaluatorTest, DivisionOperator) {
  auto *op =
      storage.Create<DivisionOperator>(storage.Create<PrimitiveLiteral>(50),
                                       storage.Create<PrimitiveLiteral>(10));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), 5);
}

TEST_F(ExpressionEvaluatorTest, ModOperator) {
  auto *op = storage.Create<ModOperator>(storage.Create<PrimitiveLiteral>(65),
                                         storage.Create<PrimitiveLiteral>(10));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), 5);
}

TEST_F(ExpressionEvaluatorTest, EqualOperator) {
  auto *op =
      storage.Create<EqualOperator>(storage.Create<PrimitiveLiteral>(10),
                                    storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), false);
  op = storage.Create<EqualOperator>(storage.Create<PrimitiveLiteral>(15),
                                     storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), true);
  op = storage.Create<EqualOperator>(storage.Create<PrimitiveLiteral>(20),
                                     storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), false);
}

TEST_F(ExpressionEvaluatorTest, NotEqualOperator) {
  auto *op =
      storage.Create<NotEqualOperator>(storage.Create<PrimitiveLiteral>(10),
                                       storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<NotEqualOperator>(storage.Create<PrimitiveLiteral>(15),
                                        storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), false);
  op = storage.Create<NotEqualOperator>(storage.Create<PrimitiveLiteral>(20),
                                        storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, LessOperator) {
  auto *op = storage.Create<LessOperator>(storage.Create<PrimitiveLiteral>(10),
                                          storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<LessOperator>(storage.Create<PrimitiveLiteral>(15),
                                    storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), false);
  op = storage.Create<LessOperator>(storage.Create<PrimitiveLiteral>(20),
                                    storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), false);
}

TEST_F(ExpressionEvaluatorTest, GreaterOperator) {
  auto *op =
      storage.Create<GreaterOperator>(storage.Create<PrimitiveLiteral>(10),
                                      storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), false);
  op = storage.Create<GreaterOperator>(storage.Create<PrimitiveLiteral>(15),
                                       storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), false);
  op = storage.Create<GreaterOperator>(storage.Create<PrimitiveLiteral>(20),
                                       storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, LessEqualOperator) {
  auto *op =
      storage.Create<LessEqualOperator>(storage.Create<PrimitiveLiteral>(10),
                                        storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), true);
  op = storage.Create<LessEqualOperator>(storage.Create<PrimitiveLiteral>(15),
                                         storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), true);
  op = storage.Create<LessEqualOperator>(storage.Create<PrimitiveLiteral>(20),
                                         storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), false);
}

TEST_F(ExpressionEvaluatorTest, GreaterEqualOperator) {
  auto *op = storage.Create<GreaterEqualOperator>(
      storage.Create<PrimitiveLiteral>(10),
      storage.Create<PrimitiveLiteral>(15));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), false);
  op = storage.Create<GreaterEqualOperator>(
      storage.Create<PrimitiveLiteral>(15),
      storage.Create<PrimitiveLiteral>(15));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), true);
  op = storage.Create<GreaterEqualOperator>(
      storage.Create<PrimitiveLiteral>(20),
      storage.Create<PrimitiveLiteral>(15));
  auto val3 = Eval(op);
  ASSERT_EQ(val3.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, InListOperator) {
  auto *list_literal = storage.Create<ListLiteral>(std::vector<Expression *>{
      storage.Create<PrimitiveLiteral>(1), storage.Create<PrimitiveLiteral>(2),
      storage.Create<PrimitiveLiteral>("a")});
  {
    // Element exists in list.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>(2), list_literal);
    auto value = Eval(op);
    EXPECT_EQ(value.ValueBool(), true);
  }
  {
    // Element doesn't exist in list.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>("x"), list_literal);
    auto value = Eval(op);
    EXPECT_EQ(value.ValueBool(), false);
  }
  {
    auto *list_literal = storage.Create<ListLiteral>(std::vector<Expression *>{
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(2),
        storage.Create<PrimitiveLiteral>("a")});
    // Element doesn't exist in list with null element.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>("x"), list_literal);
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Null list.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>("x"),
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Null literal.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        list_literal);
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Null literal, empty list.
    auto *op = storage.Create<InListOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<ListLiteral>(std::vector<Expression *>()));
    auto value = Eval(op);
    EXPECT_FALSE(value.ValueBool());
  }
}

TEST_F(ExpressionEvaluatorTest, ListIndexing) {
  auto *list_literal = storage.Create<ListLiteral>(std::vector<Expression *>{
      storage.Create<PrimitiveLiteral>(1), storage.Create<PrimitiveLiteral>(2),
      storage.Create<PrimitiveLiteral>(3),
      storage.Create<PrimitiveLiteral>(4)});
  {
    // Legal indexing.
    auto *op = storage.Create<SubscriptOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(2));
    auto value = Eval(op);
    EXPECT_EQ(value.ValueInt(), 3);
  }
  {
    // Out of bounds indexing.
    auto *op = storage.Create<SubscriptOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(4));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Out of bounds indexing with negative bound.
    auto *op = storage.Create<SubscriptOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(-100));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Legal indexing with negative index.
    auto *op = storage.Create<SubscriptOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(-2));
    auto value = Eval(op);
    EXPECT_EQ(value.ValueInt(), 3);
  }
  {
    // Indexing with one operator being null.
    auto *op = storage.Create<SubscriptOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(-2));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Indexing with incompatible type.
    auto *op = storage.Create<SubscriptOperator>(
        list_literal, storage.Create<PrimitiveLiteral>("bla"));
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
}

TEST_F(ExpressionEvaluatorTest, MapIndexing) {
  auto *map_literal =
      storage.Create<MapLiteral>(std::unordered_map<PropertyIx, Expression *>{
          {storage.GetPropertyIx("a"), storage.Create<PrimitiveLiteral>(1)},
          {storage.GetPropertyIx("b"), storage.Create<PrimitiveLiteral>(2)},
          {storage.GetPropertyIx("c"), storage.Create<PrimitiveLiteral>(3)}});
  {
    // Legal indexing.
    auto *op = storage.Create<SubscriptOperator>(
        map_literal, storage.Create<PrimitiveLiteral>("b"));
    auto value = Eval(op);
    EXPECT_EQ(value.ValueInt(), 2);
  }
  {
    // Legal indexing, non-existing key.
    auto *op = storage.Create<SubscriptOperator>(
        map_literal, storage.Create<PrimitiveLiteral>("z"));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
  {
    // Wrong key type.
    auto *op = storage.Create<SubscriptOperator>(
        map_literal, storage.Create<PrimitiveLiteral>(42));
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
  {
    // Indexing with Null.
    auto *op = storage.Create<SubscriptOperator>(
        map_literal,
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
}

TEST_F(ExpressionEvaluatorTest, VertexAndEdgeIndexing) {
  auto edge_type = dba.NameToEdgeType("edge_type");
  auto prop = dba.NameToProperty("prop");
  auto v1 = dba.InsertVertex();
  auto e11 = dba.InsertEdge(&v1, &v1, edge_type);
  ASSERT_TRUE(e11.HasValue());
  ASSERT_TRUE(v1.SetProperty(prop, storage::PropertyValue(42)).HasValue());
  ASSERT_TRUE(e11->SetProperty(prop, storage::PropertyValue(43)).HasValue());
  dba.AdvanceCommand();

  auto *vertex_id = CreateIdentifierWithValue("v1", TypedValue(v1));
  auto *edge_id = CreateIdentifierWithValue("e11", TypedValue(*e11));
  {
    // Legal indexing.
    auto *op1 = storage.Create<SubscriptOperator>(
        vertex_id, storage.Create<PrimitiveLiteral>("prop"));
    auto value1 = Eval(op1);
    EXPECT_EQ(value1.ValueInt(), 42);

    auto *op2 = storage.Create<SubscriptOperator>(
        edge_id, storage.Create<PrimitiveLiteral>("prop"));
    auto value2 = Eval(op2);
    EXPECT_EQ(value2.ValueInt(), 43);
  }
  {
    // Legal indexing, non-existing key.
    auto *op1 = storage.Create<SubscriptOperator>(
        vertex_id, storage.Create<PrimitiveLiteral>("blah"));
    auto value1 = Eval(op1);
    EXPECT_TRUE(value1.IsNull());

    auto *op2 = storage.Create<SubscriptOperator>(
        edge_id, storage.Create<PrimitiveLiteral>("blah"));
    auto value2 = Eval(op2);
    EXPECT_TRUE(value2.IsNull());
  }
  {
    // Wrong key type.
    auto *op1 = storage.Create<SubscriptOperator>(
        vertex_id, storage.Create<PrimitiveLiteral>(1));
    EXPECT_THROW(Eval(op1), QueryRuntimeException);

    auto *op2 = storage.Create<SubscriptOperator>(
        edge_id, storage.Create<PrimitiveLiteral>(1));
    EXPECT_THROW(Eval(op2), QueryRuntimeException);
  }
  {
    // Indexing with Null.
    auto *op1 = storage.Create<SubscriptOperator>(
        vertex_id, storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
    auto value1 = Eval(op1);
    EXPECT_TRUE(value1.IsNull());

    auto *op2 = storage.Create<SubscriptOperator>(
        edge_id, storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
    auto value2 = Eval(op2);
    EXPECT_TRUE(value2.IsNull());
  }
}

TEST_F(ExpressionEvaluatorTest, ListSlicingOperator) {
  auto *list_literal = storage.Create<ListLiteral>(std::vector<Expression *>{
      storage.Create<PrimitiveLiteral>(1), storage.Create<PrimitiveLiteral>(2),
      storage.Create<PrimitiveLiteral>(3),
      storage.Create<PrimitiveLiteral>(4)});

  auto extract_ints = [](TypedValue list) {
    std::vector<int64_t> int_list;
    for (auto x : list.ValueList()) {
      int_list.push_back(x.ValueInt());
    }
    return int_list;
  };
  {
    // Legal slicing with both bounds defined.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(2),
        storage.Create<PrimitiveLiteral>(4));
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre(3, 4));
  }
  {
    // Legal slicing with negative bound.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(2),
        storage.Create<PrimitiveLiteral>(-1));
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre(3));
  }
  {
    // Lower bound larger than upper bound.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(2),
        storage.Create<PrimitiveLiteral>(-4));
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre());
  }
  {
    // Bounds ouf or range.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(-100),
        storage.Create<PrimitiveLiteral>(10));
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre(1, 2, 3, 4));
  }
  {
    // Lower bound undefined.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, nullptr, storage.Create<PrimitiveLiteral>(3));
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre(1, 2, 3));
  }
  {
    // Upper bound undefined.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(-2), nullptr);
    auto value = Eval(op);
    EXPECT_THAT(extract_ints(value), ElementsAre(3, 4));
  }
  {
    // Bound of illegal type and null value bound.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal,
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>("mirko"));
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
  {
    // List of illegal type.
    auto *op = storage.Create<ListSlicingOperator>(
        storage.Create<PrimitiveLiteral>("a"),
        storage.Create<PrimitiveLiteral>(-2), nullptr);
    EXPECT_THROW(Eval(op), QueryRuntimeException);
  }
  {
    // Null value list with undefined upper bound.
    auto *op = storage.Create<ListSlicingOperator>(
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()),
        storage.Create<PrimitiveLiteral>(-2), nullptr);
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
    ;
  }
  {
    // Null value index.
    auto *op = storage.Create<ListSlicingOperator>(
        list_literal, storage.Create<PrimitiveLiteral>(-2),
        storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
    ;
  }
}

TEST_F(ExpressionEvaluatorTest, IfOperator) {
  auto *then_expression = storage.Create<PrimitiveLiteral>(10);
  auto *else_expression = storage.Create<PrimitiveLiteral>(20);
  {
    auto *condition_true =
        storage.Create<EqualOperator>(storage.Create<PrimitiveLiteral>(2),
                                      storage.Create<PrimitiveLiteral>(2));
    auto *op = storage.Create<IfOperator>(condition_true, then_expression,
                                          else_expression);
    auto value = Eval(op);
    ASSERT_EQ(value.ValueInt(), 10);
  }
  {
    auto *condition_false =
        storage.Create<EqualOperator>(storage.Create<PrimitiveLiteral>(2),
                                      storage.Create<PrimitiveLiteral>(3));
    auto *op = storage.Create<IfOperator>(condition_false, then_expression,
                                          else_expression);
    auto value = Eval(op);
    ASSERT_EQ(value.ValueInt(), 20);
  }
  {
    auto *condition_exception =
        storage.Create<AdditionOperator>(storage.Create<PrimitiveLiteral>(2),
                                         storage.Create<PrimitiveLiteral>(3));
    auto *op = storage.Create<IfOperator>(condition_exception, then_expression,
                                          else_expression);
    ASSERT_THROW(Eval(op), QueryRuntimeException);
  }
}

TEST_F(ExpressionEvaluatorTest, NotOperator) {
  auto *op =
      storage.Create<NotOperator>(storage.Create<PrimitiveLiteral>(false));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, UnaryPlusOperator) {
  auto *op =
      storage.Create<UnaryPlusOperator>(storage.Create<PrimitiveLiteral>(5));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), 5);
}

TEST_F(ExpressionEvaluatorTest, UnaryMinusOperator) {
  auto *op =
      storage.Create<UnaryMinusOperator>(storage.Create<PrimitiveLiteral>(5));
  auto value = Eval(op);
  ASSERT_EQ(value.ValueInt(), -5);
}

TEST_F(ExpressionEvaluatorTest, IsNullOperator) {
  auto *op =
      storage.Create<IsNullOperator>(storage.Create<PrimitiveLiteral>(1));
  auto val1 = Eval(op);
  ASSERT_EQ(val1.ValueBool(), false);
  op = storage.Create<IsNullOperator>(
      storage.Create<PrimitiveLiteral>(storage::PropertyValue()));
  auto val2 = Eval(op);
  ASSERT_EQ(val2.ValueBool(), true);
}

TEST_F(ExpressionEvaluatorTest, LabelsTest) {
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("ANIMAL")).HasValue());
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("DOG")).HasValue());
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("NICE_DOG")).HasValue());
  dba.AdvanceCommand();
  auto *identifier = storage.Create<Identifier>("n");
  auto node_symbol = symbol_table.CreateSymbol("n", true);
  identifier->MapTo(node_symbol);
  frame[node_symbol] = TypedValue(v1);
  {
    auto *op = storage.Create<LabelsTest>(
        identifier, std::vector<LabelIx>{storage.GetLabelIx("DOG"),
                                         storage.GetLabelIx("ANIMAL")});
    auto value = Eval(op);
    EXPECT_EQ(value.ValueBool(), true);
  }
  {
    auto *op = storage.Create<LabelsTest>(
        identifier, std::vector<LabelIx>{storage.GetLabelIx("DOG"),
                                         storage.GetLabelIx("BAD_DOG"),
                                         storage.GetLabelIx("ANIMAL")});
    auto value = Eval(op);
    EXPECT_EQ(value.ValueBool(), false);
  }
  {
    frame[node_symbol] = TypedValue();
    auto *op = storage.Create<LabelsTest>(
        identifier, std::vector<LabelIx>{storage.GetLabelIx("DOG"),
                                         storage.GetLabelIx("BAD_DOG"),
                                         storage.GetLabelIx("ANIMAL")});
    auto value = Eval(op);
    EXPECT_TRUE(value.IsNull());
  }
}

TEST_F(ExpressionEvaluatorTest, Aggregation) {
  auto aggr = storage.Create<Aggregation>(storage.Create<PrimitiveLiteral>(42),
                                          nullptr, Aggregation::Op::COUNT);
  auto aggr_sym = symbol_table.CreateSymbol("aggr", true);
  aggr->MapTo(aggr_sym);
  frame[aggr_sym] = TypedValue(1);
  auto value = Eval(aggr);
  EXPECT_EQ(value.ValueInt(), 1);
}

TEST_F(ExpressionEvaluatorTest, ListLiteral) {
  auto *list_literal = storage.Create<ListLiteral>(
      std::vector<Expression *>{storage.Create<PrimitiveLiteral>(1),
                                storage.Create<PrimitiveLiteral>("bla"),
                                storage.Create<PrimitiveLiteral>(true)});
  TypedValue result = Eval(list_literal);
  ASSERT_TRUE(result.IsList());
  auto &result_elems = result.ValueList();
  ASSERT_EQ(3, result_elems.size());
  EXPECT_TRUE(result_elems[0].IsInt());
  ;
  EXPECT_TRUE(result_elems[1].IsString());
  ;
  EXPECT_TRUE(result_elems[2].IsBool());
  ;
}

TEST_F(ExpressionEvaluatorTest, ParameterLookup) {
  ctx.parameters.Add(0, storage::PropertyValue(42));
  auto *param_lookup = storage.Create<ParameterLookup>(0);
  auto value = Eval(param_lookup);
  ASSERT_TRUE(value.IsInt());
  EXPECT_EQ(value.ValueInt(), 42);
}

TEST_F(ExpressionEvaluatorTest, All) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *all =
      ALL("x", LIST(LITERAL(1), LITERAL(2)), WHERE(EQ(ident_x, LITERAL(1))));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  all->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(all);
  ASSERT_TRUE(value.IsBool());
  EXPECT_FALSE(value.ValueBool());
}

TEST_F(ExpressionEvaluatorTest, FunctionAllNullList) {
  AstStorage storage;
  auto *all = ALL("x", LITERAL(storage::PropertyValue()), WHERE(LITERAL(true)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  all->identifier_->MapTo(x_sym);
  auto value = Eval(all);
  EXPECT_TRUE(value.IsNull());
}

TEST_F(ExpressionEvaluatorTest, FunctionAllWhereWrongType) {
  AstStorage storage;
  auto *all = ALL("x", LIST(LITERAL(1)), WHERE(LITERAL(2)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  all->identifier_->MapTo(x_sym);
  EXPECT_THROW(Eval(all), QueryRuntimeException);
}

TEST_F(ExpressionEvaluatorTest, FunctionSingle) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *single =
      SINGLE("x", LIST(LITERAL(1), LITERAL(2)), WHERE(EQ(ident_x, LITERAL(1))));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  single->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(single);
  ASSERT_TRUE(value.IsBool());
  EXPECT_TRUE(value.ValueBool());
}

TEST_F(ExpressionEvaluatorTest, FunctionSingle2) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *single = SINGLE("x", LIST(LITERAL(1), LITERAL(2)),
                        WHERE(GREATER(ident_x, LITERAL(0))));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  single->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(single);
  ASSERT_TRUE(value.IsBool());
  EXPECT_FALSE(value.ValueBool());
}

TEST_F(ExpressionEvaluatorTest, FunctionSingleNullList) {
  AstStorage storage;
  auto *single =
      SINGLE("x", LITERAL(storage::PropertyValue()), WHERE(LITERAL(true)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  single->identifier_->MapTo(x_sym);
  auto value = Eval(single);
  EXPECT_TRUE(value.IsNull());
}

TEST_F(ExpressionEvaluatorTest, FunctionAny) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *any =
      ANY("x", LIST(LITERAL(1), LITERAL(2)), WHERE(EQ(ident_x, LITERAL(1))));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  any->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(any);
  ASSERT_TRUE(value.IsBool());
  EXPECT_TRUE(value.ValueBool());
}

TEST_F(ExpressionEvaluatorTest, FunctionAny2) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *any =
      ANY("x", LIST(LITERAL(1), LITERAL(2)), WHERE(EQ(ident_x, LITERAL(0))));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  any->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(any);
  ASSERT_TRUE(value.IsBool());
  EXPECT_FALSE(value.ValueBool());
}

TEST_F(ExpressionEvaluatorTest, FunctionAnyNullList) {
  AstStorage storage;
  auto *any = ANY("x", LITERAL(storage::PropertyValue()), WHERE(LITERAL(true)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  any->identifier_->MapTo(x_sym);
  auto value = Eval(any);
  EXPECT_TRUE(value.IsNull());
}

TEST_F(ExpressionEvaluatorTest, FunctionAnyWhereWrongType) {
  AstStorage storage;
  auto *any = ANY("x", LIST(LITERAL(1)), WHERE(LITERAL(2)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  any->identifier_->MapTo(x_sym);
  EXPECT_THROW(Eval(any), QueryRuntimeException);
}

TEST_F(ExpressionEvaluatorTest, FunctionReduce) {
  AstStorage storage;
  auto *ident_sum = IDENT("sum");
  auto *ident_x = IDENT("x");
  auto *reduce = REDUCE("sum", LITERAL(0), "x", LIST(LITERAL(1), LITERAL(2)),
                        ADD(ident_sum, ident_x));
  const auto sum_sym = symbol_table.CreateSymbol("sum", true);
  reduce->accumulator_->MapTo(sum_sym);
  ident_sum->MapTo(sum_sym);
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  reduce->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(reduce);
  ASSERT_TRUE(value.IsInt());
  EXPECT_EQ(value.ValueInt(), 3);
}

TEST_F(ExpressionEvaluatorTest, FunctionExtract) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *extract = EXTRACT(
      "x", LIST(LITERAL(1), LITERAL(2), LITERAL(storage::PropertyValue())),
      ADD(ident_x, LITERAL(1)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  extract->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(extract);
  EXPECT_TRUE(value.IsList());
  ;
  auto result = value.ValueList();
  EXPECT_EQ(result[0].ValueInt(), 2);
  EXPECT_EQ(result[1].ValueInt(), 3);
  EXPECT_TRUE(result[2].IsNull());
}

TEST_F(ExpressionEvaluatorTest, FunctionExtractNull) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *extract =
      EXTRACT("x", LITERAL(storage::PropertyValue()), ADD(ident_x, LITERAL(1)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  extract->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  auto value = Eval(extract);
  EXPECT_TRUE(value.IsNull());
}

TEST_F(ExpressionEvaluatorTest, FunctionExtractExceptions) {
  AstStorage storage;
  auto *ident_x = IDENT("x");
  auto *extract = EXTRACT("x", LITERAL("bla"), ADD(ident_x, LITERAL(1)));
  const auto x_sym = symbol_table.CreateSymbol("x", true);
  extract->identifier_->MapTo(x_sym);
  ident_x->MapTo(x_sym);
  EXPECT_THROW(Eval(extract), QueryRuntimeException);
}

TEST_F(ExpressionEvaluatorTest, Coalesce) {
  // coalesce()
  EXPECT_THROW(Eval(COALESCE()), QueryRuntimeException);

  // coalesce(null, null)
  EXPECT_TRUE(
      Eval(COALESCE(LITERAL(TypedValue()), LITERAL(TypedValue()))).IsNull());

  // coalesce(null, 2, 3)
  EXPECT_EQ(
      Eval(COALESCE(LITERAL(TypedValue()), LITERAL(2), LITERAL(3))).ValueInt(),
      2);

  // coalesce(null, 2, assert(false), 3)
  EXPECT_EQ(Eval(COALESCE(LITERAL(TypedValue()), LITERAL(2),
                          FN("ASSERT", LITERAL(false)), LITERAL(3)))
                .ValueInt(),
            2);

  // (null, assert(false))
  EXPECT_THROW(
      Eval(COALESCE(LITERAL(TypedValue()), FN("ASSERT", LITERAL(false)))),
      QueryRuntimeException);

  // coalesce([null, null])
  EXPECT_FALSE(Eval(COALESCE(LITERAL(TypedValue(
                        std::vector<TypedValue>{TypedValue(), TypedValue()}))))
                   .IsNull());
}

TEST_F(ExpressionEvaluatorTest, RegexMatchInvalidArguments) {
  EXPECT_TRUE(
      Eval(storage.Create<RegexMatch>(LITERAL(TypedValue()), LITERAL("regex")))
          .IsNull());
  EXPECT_TRUE(
      Eval(storage.Create<RegexMatch>(LITERAL(3), LITERAL("regex"))).IsNull());
  EXPECT_TRUE(Eval(storage.Create<RegexMatch>(LIST(LITERAL("string")),
                                              LITERAL("regex")))
                  .IsNull());
  EXPECT_TRUE(
      Eval(storage.Create<RegexMatch>(LITERAL("string"), LITERAL(TypedValue())))
          .IsNull());
  EXPECT_THROW(Eval(storage.Create<RegexMatch>(LITERAL("string"), LITERAL(42))),
               QueryRuntimeException);
  EXPECT_THROW(Eval(storage.Create<RegexMatch>(LITERAL("string"),
                                               LIST(LITERAL("regex")))),
               QueryRuntimeException);
}

TEST_F(ExpressionEvaluatorTest, RegexMatchInvalidRegex) {
  EXPECT_THROW(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL("*ext"))),
      QueryRuntimeException);
  EXPECT_THROW(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL("[ext"))),
      QueryRuntimeException);
}

TEST_F(ExpressionEvaluatorTest, RegexMatch) {
  EXPECT_FALSE(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL(".*ex")))
          .ValueBool());
  EXPECT_TRUE(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL(".*ext")))
          .ValueBool());
  EXPECT_FALSE(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL("[ext]")))
          .ValueBool());
  EXPECT_TRUE(
      Eval(storage.Create<RegexMatch>(LITERAL("text"), LITERAL(".+[ext]")))
          .ValueBool());
}

class ExpressionEvaluatorPropertyLookup : public ExpressionEvaluatorTest {
 protected:
  std::pair<std::string, storage::PropertyId> prop_age =
      std::make_pair("age", dba.NameToProperty("age"));
  std::pair<std::string, storage::PropertyId> prop_height =
      std::make_pair("height", dba.NameToProperty("height"));
  Identifier *identifier = storage.Create<Identifier>("element");
  Symbol symbol = symbol_table.CreateSymbol("element", true);

  void SetUp() { identifier->MapTo(symbol); }

  auto Value(std::pair<std::string, storage::PropertyId> property) {
    auto *op = storage.Create<PropertyLookup>(
        identifier, storage.GetPropertyIx(property.first));
    return Eval(op);
  }
};

TEST_F(ExpressionEvaluatorPropertyLookup, Vertex) {
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(
      v1.SetProperty(prop_age.second, storage::PropertyValue(10)).HasValue());
  dba.AdvanceCommand();
  frame[symbol] = TypedValue(v1);
  EXPECT_EQ(Value(prop_age).ValueInt(), 10);
  EXPECT_TRUE(Value(prop_height).IsNull());
}

TEST_F(ExpressionEvaluatorPropertyLookup, Edge) {
  auto v1 = dba.InsertVertex();
  auto v2 = dba.InsertVertex();
  auto e12 = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("edge_type"));
  ASSERT_TRUE(e12.HasValue());
  ASSERT_TRUE(
      e12->SetProperty(prop_age.second, storage::PropertyValue(10)).HasValue());
  dba.AdvanceCommand();
  frame[symbol] = TypedValue(*e12);
  EXPECT_EQ(Value(prop_age).ValueInt(), 10);
  EXPECT_TRUE(Value(prop_height).IsNull());
}

TEST_F(ExpressionEvaluatorPropertyLookup, Null) {
  frame[symbol] = TypedValue();
  EXPECT_TRUE(Value(prop_age).IsNull());
}

TEST_F(ExpressionEvaluatorPropertyLookup, MapLiteral) {
  frame[symbol] = TypedValue(
      std::map<std::string, TypedValue>{{prop_age.first, TypedValue(10)}});
  EXPECT_EQ(Value(prop_age).ValueInt(), 10);
  EXPECT_TRUE(Value(prop_height).IsNull());
}

class FunctionTest : public ExpressionEvaluatorTest {
 protected:
  std::vector<Expression *> ExpressionsFromTypedValues(
      const std::vector<TypedValue> &tvs) {
    std::vector<Expression *> expressions;
    expressions.reserve(tvs.size());

    for (size_t i = 0; i < tvs.size(); ++i) {
      auto *ident =
          storage.Create<Identifier>("arg_" + std::to_string(i), true);
      auto sym = symbol_table.CreateSymbol("arg_" + std::to_string(i), true);
      ident->MapTo(sym);
      frame[sym] = tvs[i];
      expressions.push_back(ident);
    }

    return expressions;
  }

  TypedValue EvaluateFunctionWithExprs(
      const std::string &function_name,
      const std::vector<Expression *> &expressions) {
    auto *op = storage.Create<Function>(function_name, expressions);
    return Eval(op);
  }

  template <class... TArgs>
  TypedValue EvaluateFunction(const std::string &function_name,
                              std::tuple<TArgs...> args) {
    std::vector<TypedValue> tv_args;
    tv_args.reserve(args.size());
    for (auto &arg : args) tv_args.emplace_back(std::move(arg));
    return EvaluateFunctionWithExprs(function_name,
                                     ExpressionsFromTypedValues(tv_args));
  }

  template <class... TArgs>
  TypedValue EvaluateFunction(const std::string &function_name,
                              TArgs &&... args) {
    return EvaluateFunctionWithExprs(
        function_name, ExpressionsFromTypedValues(
                           std::vector<TypedValue>{TypedValue(args)...}));
  }
};

template <class... TArgs>
static TypedValue MakeTypedValueList(TArgs &&... args) {
  return TypedValue(std::vector<TypedValue>{TypedValue(args)...});
}

TEST_F(FunctionTest, EndNode) {
  ASSERT_THROW(EvaluateFunction("ENDNODE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("ENDNODE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("label1")).HasValue());
  auto v2 = dba.InsertVertex();
  ASSERT_TRUE(v2.AddLabel(dba.NameToLabel("label2")).HasValue());
  auto e = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("t"));
  ASSERT_TRUE(e.HasValue());
  ASSERT_TRUE(*EvaluateFunction("ENDNODE", *e)
                   .ValueVertex()
                   .HasLabel(storage::View::NEW, dba.NameToLabel("label2")));
  ASSERT_THROW(EvaluateFunction("ENDNODE", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Head) {
  ASSERT_THROW(EvaluateFunction("HEAD"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("HEAD", TypedValue()).IsNull());
  auto argument = MakeTypedValueList(3, 4, 5);
  ASSERT_EQ(EvaluateFunction("HEAD", argument).ValueInt(), 3);
  argument.ValueList().clear();
  ASSERT_TRUE(EvaluateFunction("HEAD", argument).IsNull());
  ASSERT_THROW(EvaluateFunction("HEAD", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Properties) {
  ASSERT_THROW(EvaluateFunction("PROPERTIES"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("PROPERTIES", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(
      v1.SetProperty(dba.NameToProperty("height"), storage::PropertyValue(5))
          .HasValue());
  ASSERT_TRUE(
      v1.SetProperty(dba.NameToProperty("age"), storage::PropertyValue(10))
          .HasValue());
  auto v2 = dba.InsertVertex();
  auto e = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("type1"));
  ASSERT_TRUE(e.HasValue());
  ASSERT_TRUE(
      e->SetProperty(dba.NameToProperty("height"), storage::PropertyValue(3))
          .HasValue());
  ASSERT_TRUE(
      e->SetProperty(dba.NameToProperty("age"), storage::PropertyValue(15))
          .HasValue());
  dba.AdvanceCommand();

  auto prop_values_to_int = [](TypedValue t) {
    std::unordered_map<std::string, int> properties;
    for (auto property : t.ValueMap()) {
      properties[std::string(property.first)] = property.second.ValueInt();
    }
    return properties;
  };

  ASSERT_THAT(prop_values_to_int(EvaluateFunction("PROPERTIES", v1)),
              UnorderedElementsAre(testing::Pair("height", 5),
                                   testing::Pair("age", 10)));
  ASSERT_THAT(prop_values_to_int(EvaluateFunction("PROPERTIES", *e)),
              UnorderedElementsAre(testing::Pair("height", 3),
                                   testing::Pair("age", 15)));
  ASSERT_THROW(EvaluateFunction("PROPERTIES", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Last) {
  ASSERT_THROW(EvaluateFunction("LAST"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("LAST", TypedValue()).IsNull());
  auto argument = MakeTypedValueList(3, 4, 5);
  ASSERT_EQ(EvaluateFunction("LAST", argument).ValueInt(), 5);
  argument.ValueList().clear();
  ASSERT_TRUE(EvaluateFunction("LAST", argument).IsNull());
  ASSERT_THROW(EvaluateFunction("LAST", 5), QueryRuntimeException);
}

TEST_F(FunctionTest, Size) {
  ASSERT_THROW(EvaluateFunction("SIZE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("SIZE", TypedValue()).IsNull());
  auto argument = MakeTypedValueList(3, 4, 5);
  ASSERT_EQ(EvaluateFunction("SIZE", argument).ValueInt(), 3);
  ASSERT_EQ(EvaluateFunction("SIZE", "john").ValueInt(), 4);
  ASSERT_EQ(
      EvaluateFunction(
          "SIZE", std::map<std::string, TypedValue>{{"a", TypedValue(5)},
                                                    {"b", TypedValue(true)},
                                                    {"c", TypedValue("123")}})
          .ValueInt(),
      3);
  ASSERT_THROW(EvaluateFunction("SIZE", 5), QueryRuntimeException);

  auto v0 = dba.InsertVertex();
  query::Path path(v0);
  EXPECT_EQ(EvaluateFunction("SIZE", path).ValueInt(), 0);
  auto v1 = dba.InsertVertex();
  auto edge = dba.InsertEdge(&v0, &v1, dba.NameToEdgeType("type"));
  ASSERT_TRUE(edge.HasValue());
  path.Expand(*edge);
  path.Expand(v1);
  EXPECT_EQ(EvaluateFunction("SIZE", path).ValueInt(), 1);
}

TEST_F(FunctionTest, StartNode) {
  ASSERT_THROW(EvaluateFunction("STARTNODE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("STARTNODE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("label1")).HasValue());
  auto v2 = dba.InsertVertex();
  ASSERT_TRUE(v2.AddLabel(dba.NameToLabel("label2")).HasValue());
  auto e = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("t"));
  ASSERT_TRUE(e.HasValue());
  ASSERT_TRUE(*EvaluateFunction("STARTNODE", *e)
                   .ValueVertex()
                   .HasLabel(storage::View::NEW, dba.NameToLabel("label1")));
  ASSERT_THROW(EvaluateFunction("STARTNODE", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Degree) {
  ASSERT_THROW(EvaluateFunction("DEGREE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("DEGREE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  auto v2 = dba.InsertVertex();
  auto v3 = dba.InsertVertex();
  auto e12 = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("t"));
  ASSERT_TRUE(e12.HasValue());
  ASSERT_TRUE(dba.InsertEdge(&v3, &v2, dba.NameToEdgeType("t")).HasValue());
  dba.AdvanceCommand();
  ASSERT_EQ(EvaluateFunction("DEGREE", v1).ValueInt(), 1);
  ASSERT_EQ(EvaluateFunction("DEGREE", v2).ValueInt(), 2);
  ASSERT_EQ(EvaluateFunction("DEGREE", v3).ValueInt(), 1);
  ASSERT_THROW(EvaluateFunction("DEGREE", 2), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("DEGREE", *e12), QueryRuntimeException);
}

TEST_F(FunctionTest, InDegree) {
  ASSERT_THROW(EvaluateFunction("INDEGREE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("INDEGREE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  auto v2 = dba.InsertVertex();
  auto v3 = dba.InsertVertex();
  auto e12 = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("t"));
  ASSERT_TRUE(e12.HasValue());
  ASSERT_TRUE(dba.InsertEdge(&v3, &v2, dba.NameToEdgeType("t")).HasValue());
  dba.AdvanceCommand();
  ASSERT_EQ(EvaluateFunction("INDEGREE", v1).ValueInt(), 0);
  ASSERT_EQ(EvaluateFunction("INDEGREE", v2).ValueInt(), 2);
  ASSERT_EQ(EvaluateFunction("INDEGREE", v3).ValueInt(), 0);
  ASSERT_THROW(EvaluateFunction("INDEGREE", 2), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("INDEGREE", *e12), QueryRuntimeException);
}

TEST_F(FunctionTest, OutDegree) {
  ASSERT_THROW(EvaluateFunction("OUTDEGREE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("OUTDEGREE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  auto v2 = dba.InsertVertex();
  auto v3 = dba.InsertVertex();
  auto e12 = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("t"));
  ASSERT_TRUE(e12.HasValue());
  ASSERT_TRUE(dba.InsertEdge(&v3, &v2, dba.NameToEdgeType("t")).HasValue());
  dba.AdvanceCommand();
  ASSERT_EQ(EvaluateFunction("OUTDEGREE", v1).ValueInt(), 1);
  ASSERT_EQ(EvaluateFunction("OUTDEGREE", v2).ValueInt(), 0);
  ASSERT_EQ(EvaluateFunction("OUTDEGREE", v3).ValueInt(), 1);
  ASSERT_THROW(EvaluateFunction("OUTDEGREE", 2), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("OUTDEGREE", *e12), QueryRuntimeException);
}

TEST_F(FunctionTest, ToBoolean) {
  ASSERT_THROW(EvaluateFunction("TOBOOLEAN"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("TOBOOLEAN", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", 123).ValueBool(), true);
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", -213).ValueBool(), true);
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", 0).ValueBool(), false);
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", " trUE \n\t").ValueBool(), true);
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", "\n\tFalsE").ValueBool(), false);
  ASSERT_TRUE(EvaluateFunction("TOBOOLEAN", "\n\tFALSEA ").IsNull());
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", true).ValueBool(), true);
  ASSERT_EQ(EvaluateFunction("TOBOOLEAN", false).ValueBool(), false);
}

TEST_F(FunctionTest, ToFloat) {
  ASSERT_THROW(EvaluateFunction("TOFLOAT"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("TOFLOAT", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("TOFLOAT", " -3.5 \n\t").ValueDouble(), -3.5);
  ASSERT_EQ(EvaluateFunction("TOFLOAT", "\n\t0.5e-1").ValueDouble(), 0.05);
  ASSERT_TRUE(EvaluateFunction("TOFLOAT", "\n\t3.4e-3X ").IsNull());
  ASSERT_EQ(EvaluateFunction("TOFLOAT", -3.5).ValueDouble(), -3.5);
  ASSERT_EQ(EvaluateFunction("TOFLOAT", -3).ValueDouble(), -3.0);
  ASSERT_THROW(EvaluateFunction("TOFLOAT", true), QueryRuntimeException);
}

TEST_F(FunctionTest, ToInteger) {
  ASSERT_THROW(EvaluateFunction("TOINTEGER"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("TOINTEGER", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("TOINTEGER", false).ValueInt(), 0);
  ASSERT_EQ(EvaluateFunction("TOINTEGER", true).ValueInt(), 1);
  ASSERT_EQ(EvaluateFunction("TOINTEGER", "\n\t3").ValueInt(), 3);
  ASSERT_EQ(EvaluateFunction("TOINTEGER", " -3.5 \n\t").ValueInt(), -3);
  ASSERT_TRUE(EvaluateFunction("TOINTEGER", "\n\t3X ").IsNull());
  ASSERT_EQ(EvaluateFunction("TOINTEGER", -3.5).ValueInt(), -3);
  ASSERT_EQ(EvaluateFunction("TOINTEGER", 3.5).ValueInt(), 3);
}

TEST_F(FunctionTest, Type) {
  ASSERT_THROW(EvaluateFunction("TYPE"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("TYPE", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(v1.AddLabel(dba.NameToLabel("label1")).HasValue());
  auto v2 = dba.InsertVertex();
  ASSERT_TRUE(v2.AddLabel(dba.NameToLabel("label2")).HasValue());
  auto e = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("type1"));
  ASSERT_TRUE(e.HasValue());
  ASSERT_EQ(EvaluateFunction("TYPE", *e).ValueString(), "type1");
  ASSERT_THROW(EvaluateFunction("TYPE", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Labels) {
  ASSERT_THROW(EvaluateFunction("LABELS"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("LABELS", TypedValue()).IsNull());
  auto v = dba.InsertVertex();
  ASSERT_TRUE(v.AddLabel(dba.NameToLabel("label1")).HasValue());
  ASSERT_TRUE(v.AddLabel(dba.NameToLabel("label2")).HasValue());
  dba.AdvanceCommand();
  std::vector<std::string> labels;
  auto _labels = EvaluateFunction("LABELS", v).ValueList();
  labels.reserve(_labels.size());
  for (auto label : _labels) {
    labels.emplace_back(label.ValueString());
  }
  ASSERT_THAT(labels, UnorderedElementsAre("label1", "label2"));
  ASSERT_THROW(EvaluateFunction("LABELS", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, NodesRelationships) {
  EXPECT_THROW(EvaluateFunction("NODES"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("RELATIONSHIPS"), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction("NODES", TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("RELATIONSHIPS", TypedValue()).IsNull());

  {
    auto v1 = dba.InsertVertex();
    auto v2 = dba.InsertVertex();
    auto v3 = dba.InsertVertex();
    auto e1 = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("Type"));
    ASSERT_TRUE(e1.HasValue());
    auto e2 = dba.InsertEdge(&v2, &v3, dba.NameToEdgeType("Type"));
    ASSERT_TRUE(e2.HasValue());
    query::Path path{v1, *e1, v2, *e2, v3};
    dba.AdvanceCommand();

    auto _nodes = EvaluateFunction("NODES", path).ValueList();
    std::vector<query::VertexAccessor> nodes;
    for (const auto &node : _nodes) {
      nodes.push_back(node.ValueVertex());
    }
    EXPECT_THAT(nodes, ElementsAre(v1, v2, v3));

    auto _edges = EvaluateFunction("RELATIONSHIPS", path).ValueList();
    std::vector<query::EdgeAccessor> edges;
    for (const auto &edge : _edges) {
      edges.push_back(edge.ValueEdge());
    }
    EXPECT_THAT(edges, ElementsAre(*e1, *e2));
  }

  EXPECT_THROW(EvaluateFunction("NODES", 2), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("RELATIONSHIPS", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Range) {
  EXPECT_THROW(EvaluateFunction("RANGE"), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction("RANGE", 1, 2, TypedValue()).IsNull());
  EXPECT_THROW(EvaluateFunction("RANGE", 1, TypedValue(), 1.3),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("RANGE", 1, 2, 0), QueryRuntimeException);
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 1, 3)), ElementsAre(1, 2, 3));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", -1, 5, 2)),
              ElementsAre(-1, 1, 3, 5));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 2, 10, 3)),
              ElementsAre(2, 5, 8));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 2, 2, 2)), ElementsAre(2));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 3, 0, 5)), ElementsAre());
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 5, 1, -2)),
              ElementsAre(5, 3, 1));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 6, 1, -2)),
              ElementsAre(6, 4, 2));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", 2, 2, -3)), ElementsAre(2));
  EXPECT_THAT(ToIntList(EvaluateFunction("RANGE", -2, 4, -1)), ElementsAre());
}

TEST_F(FunctionTest, Keys) {
  ASSERT_THROW(EvaluateFunction("KEYS"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("KEYS", TypedValue()).IsNull());
  auto v1 = dba.InsertVertex();
  ASSERT_TRUE(
      v1.SetProperty(dba.NameToProperty("height"), storage::PropertyValue(5))
          .HasValue());
  ASSERT_TRUE(
      v1.SetProperty(dba.NameToProperty("age"), storage::PropertyValue(10))
          .HasValue());
  auto v2 = dba.InsertVertex();
  auto e = dba.InsertEdge(&v1, &v2, dba.NameToEdgeType("type1"));
  ASSERT_TRUE(e.HasValue());
  ASSERT_TRUE(
      e->SetProperty(dba.NameToProperty("width"), storage::PropertyValue(3))
          .HasValue());
  ASSERT_TRUE(
      e->SetProperty(dba.NameToProperty("age"), storage::PropertyValue(15))
          .HasValue());
  dba.AdvanceCommand();

  auto prop_keys_to_string = [](TypedValue t) {
    std::vector<std::string> keys;
    for (auto property : t.ValueList()) {
      keys.emplace_back(property.ValueString());
    }
    return keys;
  };
  ASSERT_THAT(prop_keys_to_string(EvaluateFunction("KEYS", v1)),
              UnorderedElementsAre("height", "age"));
  ASSERT_THAT(prop_keys_to_string(EvaluateFunction("KEYS", *e)),
              UnorderedElementsAre("width", "age"));
  ASSERT_THROW(EvaluateFunction("KEYS", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, Tail) {
  ASSERT_THROW(EvaluateFunction("TAIL"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("TAIL", TypedValue()).IsNull());
  auto argument = MakeTypedValueList();
  ASSERT_EQ(EvaluateFunction("TAIL", argument).ValueList().size(), 0U);
  argument = MakeTypedValueList(3, 4, true, "john");
  auto list = EvaluateFunction("TAIL", argument).ValueList();
  ASSERT_EQ(list.size(), 3U);
  ASSERT_EQ(list[0].ValueInt(), 4);
  ASSERT_EQ(list[1].ValueBool(), true);
  ASSERT_EQ(list[2].ValueString(), "john");
  ASSERT_THROW(EvaluateFunction("TAIL", 2), QueryRuntimeException);
}

TEST_F(FunctionTest, UniformSample) {
  ASSERT_THROW(EvaluateFunction("UNIFORMSAMPLE"), QueryRuntimeException);
  ASSERT_TRUE(
      EvaluateFunction("UNIFORMSAMPLE", TypedValue(), TypedValue()).IsNull());
  ASSERT_TRUE(EvaluateFunction("UNIFORMSAMPLE", TypedValue(), 1).IsNull());
  ASSERT_TRUE(
      EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(), TypedValue())
          .IsNull());
  ASSERT_TRUE(
      EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(), 1).IsNull());
  ASSERT_THROW(
      EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(1, 2, 3), -1),
      QueryRuntimeException);
  ASSERT_EQ(EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(1, 2, 3), 0)
                .ValueList()
                .size(),
            0);
  ASSERT_EQ(EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(1, 2, 3), 2)
                .ValueList()
                .size(),
            2);
  ASSERT_EQ(EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(1, 2, 3), 3)
                .ValueList()
                .size(),
            3);
  ASSERT_EQ(EvaluateFunction("UNIFORMSAMPLE", MakeTypedValueList(1, 2, 3), 5)
                .ValueList()
                .size(),
            5);
}

TEST_F(FunctionTest, Abs) {
  ASSERT_THROW(EvaluateFunction("ABS"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("ABS", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("ABS", -2).ValueInt(), 2);
  ASSERT_EQ(EvaluateFunction("ABS", -2.5).ValueDouble(), 2.5);
  ASSERT_THROW(EvaluateFunction("ABS", true), QueryRuntimeException);
}

// Test if log works. If it does then all functions wrapped with
// WRAP_CMATH_FLOAT_FUNCTION macro should work and are not gonna be tested for
// correctnes..
TEST_F(FunctionTest, Log) {
  ASSERT_THROW(EvaluateFunction("LOG"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("LOG", TypedValue()).IsNull());
  ASSERT_DOUBLE_EQ(EvaluateFunction("LOG", 2).ValueDouble(), log(2));
  ASSERT_DOUBLE_EQ(EvaluateFunction("LOG", 1.5).ValueDouble(), log(1.5));
  // Not portable, but should work on most platforms.
  ASSERT_TRUE(std::isnan(EvaluateFunction("LOG", -1.5).ValueDouble()));
  ASSERT_THROW(EvaluateFunction("LOG", true), QueryRuntimeException);
}

// Function Round wraps round from cmath and will work if FunctionTest.Log test
// passes. This test is used to show behavior of round since it differs from
// neo4j's round.
TEST_F(FunctionTest, Round) {
  ASSERT_THROW(EvaluateFunction("ROUND"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("ROUND", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("ROUND", -2).ValueDouble(), -2);
  ASSERT_EQ(EvaluateFunction("ROUND", -2.4).ValueDouble(), -2);
  ASSERT_EQ(EvaluateFunction("ROUND", -2.5).ValueDouble(), -3);
  ASSERT_EQ(EvaluateFunction("ROUND", -2.6).ValueDouble(), -3);
  ASSERT_EQ(EvaluateFunction("ROUND", 2.4).ValueDouble(), 2);
  ASSERT_EQ(EvaluateFunction("ROUND", 2.5).ValueDouble(), 3);
  ASSERT_EQ(EvaluateFunction("ROUND", 2.6).ValueDouble(), 3);
  ASSERT_THROW(EvaluateFunction("ROUND", true), QueryRuntimeException);
}

// Check if wrapped functions are callable (check if everything was spelled
// correctly...). Wrapper correctnes is checked in FunctionTest.Log function
// test.
TEST_F(FunctionTest, WrappedMathFunctions) {
  for (auto function_name :
       {"FLOOR", "CEIL", "ROUND", "EXP", "LOG", "LOG10", "SQRT", "ACOS", "ASIN",
        "ATAN", "COS", "SIN", "TAN"}) {
    EvaluateFunction(function_name, 0.5);
  }
}

TEST_F(FunctionTest, Atan2) {
  ASSERT_THROW(EvaluateFunction("ATAN2"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("ATAN2", TypedValue(), 1).IsNull());
  ASSERT_TRUE(EvaluateFunction("ATAN2", 1, TypedValue()).IsNull());
  ASSERT_DOUBLE_EQ(EvaluateFunction("ATAN2", 2, -1.0).ValueDouble(),
                   atan2(2, -1));
  ASSERT_THROW(EvaluateFunction("ATAN2", 3.0, true), QueryRuntimeException);
}

TEST_F(FunctionTest, Sign) {
  ASSERT_THROW(EvaluateFunction("SIGN"), QueryRuntimeException);
  ASSERT_TRUE(EvaluateFunction("SIGN", TypedValue()).IsNull());
  ASSERT_EQ(EvaluateFunction("SIGN", -2).ValueInt(), -1);
  ASSERT_EQ(EvaluateFunction("SIGN", -0.2).ValueInt(), -1);
  ASSERT_EQ(EvaluateFunction("SIGN", 0.0).ValueInt(), 0);
  ASSERT_EQ(EvaluateFunction("SIGN", 2.5).ValueInt(), 1);
  ASSERT_THROW(EvaluateFunction("SIGN", true), QueryRuntimeException);
}

TEST_F(FunctionTest, E) {
  ASSERT_THROW(EvaluateFunction("E", 1), QueryRuntimeException);
  ASSERT_DOUBLE_EQ(EvaluateFunction("E").ValueDouble(), M_E);
}

TEST_F(FunctionTest, Pi) {
  ASSERT_THROW(EvaluateFunction("PI", 1), QueryRuntimeException);
  ASSERT_DOUBLE_EQ(EvaluateFunction("PI").ValueDouble(), M_PI);
}

TEST_F(FunctionTest, Rand) {
  ASSERT_THROW(EvaluateFunction("RAND", 1), QueryRuntimeException);
  ASSERT_GE(EvaluateFunction("RAND").ValueDouble(), 0.0);
  ASSERT_LT(EvaluateFunction("RAND").ValueDouble(), 1.0);
}

TEST_F(FunctionTest, StartsWith) {
  EXPECT_THROW(EvaluateFunction(kStartsWith), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kStartsWith, "a", TypedValue()).IsNull());
  EXPECT_THROW(EvaluateFunction(kStartsWith, TypedValue(), 1.3),
               QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kStartsWith, "abc", "abc").ValueBool());
  EXPECT_TRUE(EvaluateFunction(kStartsWith, "abcdef", "abc").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kStartsWith, "abcdef", "aBc").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kStartsWith, "abc", "abcd").ValueBool());
}

TEST_F(FunctionTest, EndsWith) {
  EXPECT_THROW(EvaluateFunction(kEndsWith), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kEndsWith, "a", TypedValue()).IsNull());
  EXPECT_THROW(EvaluateFunction(kEndsWith, TypedValue(), 1.3),
               QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kEndsWith, "abc", "abc").ValueBool());
  EXPECT_TRUE(EvaluateFunction(kEndsWith, "abcdef", "def").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kEndsWith, "abcdef", "dEf").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kEndsWith, "bcd", "abcd").ValueBool());
}

TEST_F(FunctionTest, Contains) {
  EXPECT_THROW(EvaluateFunction(kContains), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kContains, "a", TypedValue()).IsNull());
  EXPECT_THROW(EvaluateFunction(kContains, TypedValue(), 1.3),
               QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction(kContains, "abc", "abc").ValueBool());
  EXPECT_TRUE(EvaluateFunction(kContains, "abcde", "bcd").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kContains, "cde", "abcdef").ValueBool());
  EXPECT_FALSE(EvaluateFunction(kContains, "abcdef", "dEf").ValueBool());
}

TEST_F(FunctionTest, Assert) {
  // Invalid calls.
  ASSERT_THROW(EvaluateFunction("ASSERT"), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("ASSERT", false, false), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("ASSERT", "string", false),
               QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("ASSERT", false, "reason", true),
               QueryRuntimeException);

  // Valid calls, assertion fails.
  ASSERT_THROW(EvaluateFunction("ASSERT", false), QueryRuntimeException);
  ASSERT_THROW(EvaluateFunction("ASSERT", false, "message"),
               QueryRuntimeException);
  try {
    EvaluateFunction("ASSERT", false, "bbgba");
  } catch (QueryRuntimeException &e) {
    ASSERT_TRUE(std::string(e.what()).find("bbgba") != std::string::npos);
  }

  // Valid calls, assertion passes.
  ASSERT_TRUE(EvaluateFunction("ASSERT", true).ValueBool());
  ASSERT_TRUE(EvaluateFunction("ASSERT", true, "message").ValueBool());
}

TEST_F(FunctionTest, Counter) {
  EXPECT_THROW(EvaluateFunction("COUNTER"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("COUNTER", "a"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("COUNTER", "a", "b"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("COUNTER", "a", "b", "c"),
               QueryRuntimeException);

  EXPECT_EQ(EvaluateFunction("COUNTER", "c1", 0).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c1", 0).ValueInt(), 1);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c2", 0).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c1", 0).ValueInt(), 2);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c2", 0).ValueInt(), 1);

  EXPECT_EQ(EvaluateFunction("COUNTER", "c3", -1).ValueInt(), -1);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c3", -1).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c3", -1).ValueInt(), 1);

  EXPECT_EQ(EvaluateFunction("COUNTER", "c4", 0, 5).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c4", 0, 5).ValueInt(), 5);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c4", 0, 5).ValueInt(), 10);

  EXPECT_EQ(EvaluateFunction("COUNTER", "c5", 0, -5).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c5", 0, -5).ValueInt(), -5);
  EXPECT_EQ(EvaluateFunction("COUNTER", "c5", 0, -5).ValueInt(), -10);

  EXPECT_THROW(EvaluateFunction("COUNTER", "c6", 0, 0), QueryRuntimeException);
}

TEST_F(FunctionTest, Id) {
  auto va = dba.InsertVertex();
  auto ea = dba.InsertEdge(&va, &va, dba.NameToEdgeType("edge"));
  ASSERT_TRUE(ea.HasValue());
  auto vb = dba.InsertVertex();
  dba.AdvanceCommand();
  EXPECT_EQ(EvaluateFunction("ID", va).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("ID", *ea).ValueInt(), 0);
  EXPECT_EQ(EvaluateFunction("ID", vb).ValueInt(), 1);
  EXPECT_THROW(EvaluateFunction("ID"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("ID", 0), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("ID", va, *ea), QueryRuntimeException);
}

TEST_F(FunctionTest, ToStringNull) {
  EXPECT_TRUE(EvaluateFunction("TOSTRING", TypedValue()).IsNull());
}

TEST_F(FunctionTest, ToStringString) {
  EXPECT_EQ(EvaluateFunction("TOSTRING", "").ValueString(), "");
  EXPECT_EQ(EvaluateFunction("TOSTRING", "this is a string").ValueString(),
            "this is a string");
}

TEST_F(FunctionTest, ToStringInteger) {
  EXPECT_EQ(EvaluateFunction("TOSTRING", -23321312).ValueString(), "-23321312");
  EXPECT_EQ(EvaluateFunction("TOSTRING", 0).ValueString(), "0");
  EXPECT_EQ(EvaluateFunction("TOSTRING", 42).ValueString(), "42");
}

TEST_F(FunctionTest, ToStringDouble) {
  EXPECT_EQ(EvaluateFunction("TOSTRING", -42.42).ValueString(), "-42.420000");
  EXPECT_EQ(EvaluateFunction("TOSTRING", 0.0).ValueString(), "0.000000");
  EXPECT_EQ(EvaluateFunction("TOSTRING", 238910.2313217).ValueString(),
            "238910.231322");
}

TEST_F(FunctionTest, ToStringBool) {
  EXPECT_EQ(EvaluateFunction("TOSTRING", true).ValueString(), "true");
  EXPECT_EQ(EvaluateFunction("TOSTRING", false).ValueString(), "false");
}

TEST_F(FunctionTest, ToStringExceptions) {
  EXPECT_THROW(EvaluateFunction("TOSTRING", 1, 2, 3), QueryRuntimeException);
}

TEST_F(FunctionTest, Timestamp) {
  ctx.timestamp = 42;
  EXPECT_EQ(EvaluateFunction("TIMESTAMP").ValueInt(), 42);
}

TEST_F(FunctionTest, TimestampExceptions) {
  ctx.timestamp = 42;
  EXPECT_THROW(EvaluateFunction("TIMESTAMP", 1).ValueInt(),
               QueryRuntimeException);
}

TEST_F(FunctionTest, Left) {
  EXPECT_THROW(EvaluateFunction("LEFT"), QueryRuntimeException);

  EXPECT_TRUE(EvaluateFunction("LEFT", TypedValue(), TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("LEFT", TypedValue(), 10).IsNull());
  EXPECT_THROW(EvaluateFunction("LEFT", TypedValue(), -10),
               QueryRuntimeException);

  EXPECT_EQ(EvaluateFunction("LEFT", "memgraph", 0).ValueString(), "");
  EXPECT_EQ(EvaluateFunction("LEFT", "memgraph", 3).ValueString(), "mem");
  EXPECT_EQ(EvaluateFunction("LEFT", "memgraph", 1000).ValueString(),
            "memgraph");
  EXPECT_THROW(EvaluateFunction("LEFT", "memgraph", -10),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("LEFT", "memgraph", "graph"),
               QueryRuntimeException);

  EXPECT_THROW(EvaluateFunction("LEFT", 132, 10), QueryRuntimeException);
}

TEST_F(FunctionTest, Right) {
  EXPECT_THROW(EvaluateFunction("RIGHT"), QueryRuntimeException);

  EXPECT_TRUE(EvaluateFunction("RIGHT", TypedValue(), TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("RIGHT", TypedValue(), 10).IsNull());
  EXPECT_THROW(EvaluateFunction("RIGHT", TypedValue(), -10),
               QueryRuntimeException);

  EXPECT_EQ(EvaluateFunction("RIGHT", "memgraph", 0).ValueString(), "");
  EXPECT_EQ(EvaluateFunction("RIGHT", "memgraph", 3).ValueString(), "aph");
  EXPECT_EQ(EvaluateFunction("RIGHT", "memgraph", 1000).ValueString(),
            "memgraph");
  EXPECT_THROW(EvaluateFunction("RIGHT", "memgraph", -10),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("RIGHT", "memgraph", "graph"),
               QueryRuntimeException);

  EXPECT_THROW(EvaluateFunction("RIGHT", 132, 10), QueryRuntimeException);
}

TEST_F(FunctionTest, Trimming) {
  EXPECT_TRUE(EvaluateFunction("LTRIM", TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("RTRIM", TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("TRIM", TypedValue()).IsNull());

  EXPECT_EQ(EvaluateFunction("LTRIM", "  abc    ").ValueString(), "abc    ");
  EXPECT_EQ(EvaluateFunction("RTRIM", " abc ").ValueString(), " abc");
  EXPECT_EQ(EvaluateFunction("TRIM", "abc").ValueString(), "abc");

  EXPECT_THROW(EvaluateFunction("LTRIM", "x", "y"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("RTRIM", "x", "y"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TRIM", "x", "y"), QueryRuntimeException);
}

TEST_F(FunctionTest, Reverse) {
  EXPECT_TRUE(EvaluateFunction("REVERSE", TypedValue()).IsNull());
  EXPECT_EQ(EvaluateFunction("REVERSE", "abc").ValueString(), "cba");
  EXPECT_THROW(EvaluateFunction("REVERSE", "x", "y"), QueryRuntimeException);
}

TEST_F(FunctionTest, Replace) {
  EXPECT_THROW(EvaluateFunction("REPLACE"), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction("REPLACE", TypedValue(), "l", "w").IsNull());
  EXPECT_TRUE(EvaluateFunction("REPLACE", "hello", TypedValue(), "w").IsNull());
  EXPECT_TRUE(EvaluateFunction("REPLACE", "hello", "l", TypedValue()).IsNull());
  EXPECT_EQ(EvaluateFunction("REPLACE", "hello", "l", "w").ValueString(),
            "hewwo");

  EXPECT_THROW(EvaluateFunction("REPLACE", 1, "l", "w"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("REPLACE", "hello", 1, "w"),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("REPLACE", "hello", "l", 1),
               QueryRuntimeException);
}

TEST_F(FunctionTest, Split) {
  EXPECT_THROW(EvaluateFunction("SPLIT"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("SPLIT", "one,two", 1), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("SPLIT", 1, "one,two"), QueryRuntimeException);

  EXPECT_TRUE(EvaluateFunction("SPLIT", TypedValue(), TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("SPLIT", "one,two", TypedValue()).IsNull());
  EXPECT_TRUE(EvaluateFunction("SPLIT", TypedValue(), ",").IsNull());

  auto result = EvaluateFunction("SPLIT", "one,two", ",");
  EXPECT_TRUE(result.IsList());
  EXPECT_EQ(result.ValueList()[0].ValueString(), "one");
  EXPECT_EQ(result.ValueList()[1].ValueString(), "two");
}

TEST_F(FunctionTest, Substring) {
  EXPECT_THROW(EvaluateFunction("SUBSTRING"), QueryRuntimeException);

  EXPECT_TRUE(EvaluateFunction("SUBSTRING", TypedValue(), 0, 10).IsNull());
  EXPECT_THROW(EvaluateFunction("SUBSTRING", TypedValue(), TypedValue()),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("SUBSTRING", TypedValue(), -10),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("SUBSTRING", TypedValue(), 0, TypedValue()),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("SUBSTRING", TypedValue(), 0, -10),
               QueryRuntimeException);

  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 2).ValueString(), "llo");
  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 10).ValueString(), "");
  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 2, 0).ValueString(), "");
  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 1, 3).ValueString(), "ell");
  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 1, 4).ValueString(), "ello");
  EXPECT_EQ(EvaluateFunction("SUBSTRING", "hello", 1, 10).ValueString(),
            "ello");
}

TEST_F(FunctionTest, ToLower) {
  EXPECT_THROW(EvaluateFunction("TOLOWER"), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction("TOLOWER", TypedValue()).IsNull());
  EXPECT_EQ(EvaluateFunction("TOLOWER", "Ab__C").ValueString(), "ab__c");
}

TEST_F(FunctionTest, ToUpper) {
  EXPECT_THROW(EvaluateFunction("TOUPPER"), QueryRuntimeException);
  EXPECT_TRUE(EvaluateFunction("TOUPPER", TypedValue()).IsNull());
  EXPECT_EQ(EvaluateFunction("TOUPPER", "Ab__C").ValueString(), "AB__C");
}

TEST_F(FunctionTest, ToByteString) {
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", 42), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", TypedValue()),
               QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", "", 42), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", "ff"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", "00"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("TOBYTESTRING", "0xG"), QueryRuntimeException);
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "").ValueString(), "");
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "0x").ValueString(), "");
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "0X").ValueString(), "");
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "0x0123456789aAbBcCdDeEfF")
                .ValueString(),
            "\x01\x23\x45\x67\x89\xAA\xBB\xCC\xDD\xEE\xFF");
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "0x042").ValueString().size(), 2);
  EXPECT_EQ(EvaluateFunction("TOBYTESTRING", "0x042").ValueString(),
            utils::pmr::string("\x00\x42", 2, utils::NewDeleteResource()));
}

TEST_F(FunctionTest, FromByteString) {
  EXPECT_THROW(EvaluateFunction("FROMBYTESTRING"), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("FROMBYTESTRING", 42), QueryRuntimeException);
  EXPECT_THROW(EvaluateFunction("FROMBYTESTRING", TypedValue()),
               QueryRuntimeException);
  EXPECT_EQ(EvaluateFunction("FROMBYTESTRING", "").ValueString(), "");
  auto bytestring = EvaluateFunction("TOBYTESTRING", "0x123456789aAbBcCdDeEfF");
  EXPECT_EQ(EvaluateFunction("FROMBYTESTRING", bytestring).ValueString(),
            "0x0123456789aabbccddeeff");
  EXPECT_EQ(EvaluateFunction("FROMBYTESTRING", std::string("\x00\x42", 2))
                .ValueString(),
            "0x0042");
}

}  // namespace