JsonPatchBuilderTests.cs

using Morcatko.AspNetCore.JsonMergePatch.Builder;
using Newtonsoft.Json;
using Xunit;

namespace UnitTests
{
    class ClassOne
    {
        [JsonProperty("id")]
        public int Id { get; set; } = 1;

        [JsonProperty("rec_id")]
        public string RecId { get; set; } = "abc";
    }

    class ClassTwo
    {
        [JsonProperty("first_name")]
        public string FirstName { get; set; }

        [JsonProperty("last_name")]
        public string LastName { get; set; }

        [JsonProperty("obj_property")]
        public ClassOne ObjProperty { get; set; } = new ClassOne();
    }


    public class TestCases
    {
        private readonly PatchBuilder<ClassTwo> _patchBuilder = new PatchBuilder<ClassTwo>();



        [Fact]
        public void CanPatchTopLevelProperties()
        {
            var original = new ClassTwo();

            var patch = _patchBuilder.Build("{'first_name': 'MyFirstName'}");
            var result = patch.ApplyTo(original);

            Assert.Equal("MyFirstName", result.FirstName);


        }

        [Fact]
        public void CannotPatchSubObject()
        {
            var original = new ClassTwo();

            var patch = _patchBuilder.Build("{'obj_property': { 'id': 3 }}");
            var result = patch.ApplyTo(original);

            Assert.Equal(3, result.ObjProperty.Id);


        }


    }

}