using System;

using System.Text.Json;

using System.Text.Json.Nodes;

​

//https://stackoverflow.com/questions/79071584/checking-if-jsondoument-has-all-elements-of-another-jsondoument/79076056

//Forked from https://dotnetfiddle.net/I2AxoN

​

public static class JsonDocumentExtensions

{

    public static bool IsSubsetOf(this JsonDocument subset, JsonDocument superset)

    {

        foreach (var subProp in subset.RootElement.EnumerateObject())

        {

            if (!superset.RootElement.TryGetProperty(subProp.Name, out var superPropValue) 

                || superPropValue.ValueKind != subProp.Value.ValueKind 

                //|| !superPropValue.GetRawText().Equals(subProp.Value.GetRawText()))

                || !JsonElement.DeepEquals(superPropValue, subProp.Value))

            {

                return false; // Property missing or value mismatch

            }

        }

        return true; // All properties match

    }

​

    public static bool IsSubsetOf(this JsonObject subset, JsonObject superset)

    {

        foreach (var subProp in subset)

        {

            if (!superset.TryGetPropertyValue(subProp.Key, out var superPropValue) 

                || superPropValue.GetValueKind() != subProp.Value.GetValueKind()

                || !JsonNode.DeepEquals(superPropValue, subProp.Value))

            {

                return false; // Property missing or value mismatch

            }

        }

        return true; // All properties match

    }

}

​

public class JsonSubsetComparison

{

    public static void Main()

    {

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

        TestJsonNode();

        TestJsonElement();

    }

    static void TestJsonElement()

    {

        var jsonA = "{\"prop1\": 1, \"prop2\": [\"apple\" ], \"prop3\": \"extra big\"}"; // Intentional whitespace difference included for testing purposes

        var jsonB = "{\"prop1\": 1, \"prop2\": [\"apple\"]}";

        using var docA = JsonDocument.Parse(jsonA);

        using var docB = JsonDocument.Parse(jsonB);

​

        bool result = docB.IsSubsetOf(docA);

       Console.WriteLine("Result of testing JsonNode.TestJsonElement(): {0}", result); // Output: True  

    }

    static void TestJsonNode()

    {

        var jsonA = "{\"prop1\": 1, \"prop2\": [\"apple\" ], \"prop3\": \"extra big\"}"; // Intentional whitespace difference included for testing purposes

        var jsonB = "{\"prop1\": 1, \"prop2\": [\"apple\"]}";

​

        var docA = JsonNode.Parse(jsonA).AsObject();

        var docB = JsonNode.Parse(jsonB).AsObject();

​

        bool result = docB.IsSubsetOf(docA);

        Console.WriteLine("Result of testing JsonNode.IsSubsetOf(): {0}", result); // Output: True

    }

}