Newtonsoft.Json.Linq.JsonPath.CompositeExpression.IsMatch C# (CSharp) Method

        public override bool IsMatch(JToken root, JToken t)
        {
            switch (Operator)
            {
                case QueryOperator.And:
                    foreach (QueryExpression e in Expressions)
                    {
                        if (!e.IsMatch(root, t))
                        {
                            return false;
                        }
                    }
                    return true;
                case QueryOperator.Or:
                    foreach (QueryExpression e in Expressions)
                    {
                        if (e.IsMatch(root, t))
                        {
                            return true;
                        }
                    }
                    return false;
                default:
                    throw new ArgumentOutOfRangeException();
            }
        }
    }

        public void AndExpressionTest()
        {
            CompositeExpression compositeExpression = new CompositeExpression
            {
                Operator = QueryOperator.And,
                Expressions = new List<QueryExpression>
                {
                    new BooleanQueryExpression
                    {
                        Operator = QueryOperator.Exists,
                        Path = new List<PathFilter>
                        {
                            new FieldFilter
                            {
                                Name = "FirstName"
                            }
                        }
                    },
                    new BooleanQueryExpression
                    {
                        Operator = QueryOperator.Exists,
                        Path = new List<PathFilter>
                        {
                            new FieldFilter
                            {
                                Name = "LastName"
                            }
                        }
                    }
                }
            };

            JObject o1 = new JObject
            {
                {"Title","Title!"},
                {"FirstName", "FirstName!"},
                {"LastName", "LastName!"}
            };

            Assert.IsTrue(compositeExpression.IsMatch(o1));

            JObject o2 = new JObject
            {
                {"Title","Title!"},
                {"FirstName", "FirstName!"}
            };

            Assert.IsFalse(compositeExpression.IsMatch(o2));

            JObject o3 = new JObject
            {
                {"Title","Title!"}
            };

            Assert.IsFalse(compositeExpression.IsMatch(o3));
        }