using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

using System.Collections.ObjectModel;

​

using System.Text.Json;

using System.Text.Json.Serialization;

using System.Text.Json.Serialization.Metadata;

using System.Text.Json.Nodes;

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

using Json.Path;

​

//https://stackoverflow.com/questions/78957540/jsonpath-foo-length-fails-to-return-array-length-when-tested-against-json

​

#nullable enable

​

​

    class TestClass

    {

        public static void Test()

        {

            var json = JsonNode.Parse("""{ "foo" : [1,2, 3] }""");

            var path = JsonPath.Parse("""$.foo[*].length()""");

            var results = path.Evaluate(json);

            var resultJson = JsonSerializer.SerializeToNode(results.Matches.Select(m => m.Value))!.AsArray();

            Console.WriteLine(resultJson);

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}), {2}", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine("System.Text.Json version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine("{0} version: {1}", typeof(JsonPath).Namespace, typeof(JsonPath).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​