monorepo/LCU.API.Internal.Document/LCU.Library.Internal.DocumentModelsTest/Converter/PolymorphicJsonConverterTest.cs

using FluentAssertions;
using LCU.API.Internal.DocumentLib.Containers;
using LCU.Library.Internal.DocumentModels.Converter;
using LCU.Library.Internal.DocumentModels.Responses;
using Newtonsoft.Json;
using JsonSerializer = System.Text.Json.JsonSerializer;

namespace LCU.Library.Internal.DocumentModelsTest.Converter;

public class PolymorphicJsonConverterTest
{
    public class SystemPolymorphicJsonConverterTest
    {
        [Test]
        public void WriteThenRead_AbstractBaseClassImplementation_DeserializesAsImplementation()
        {
            AbstractBaseClass original = new ConcreteClass();

            var serialized = JsonSerializer.Serialize(original);
            var deserialized = JsonSerializer.Deserialize<AbstractBaseClass>(serialized);

            Assert.IsInstanceOf<ConcreteClass>(deserialized);
            deserialized.Should().BeEquivalentTo(original);
        }

        [Test]
        public void Write_TypeDoesNotSpecifyKnownSubclasses_ThrowsException()
        {
            DoesNotSpecifyKnownTypes original = new UnknownSubtype();

            Assert.Throws<NotSupportedException>(() => JsonSerializer.Serialize(original));
        }
    }

    public class NewtonsoftPolymorphicJsonConverterTest
    {
        [Test]
        public void WriteThenRead_AbstractBaseClassImplementation_DeserializesAsImplementation()
        {
            AbstractBaseClass original = new ConcreteClass();

            var serialized = JsonConvert.SerializeObject(original);
            var deserialized = JsonConvert.DeserializeObject<AbstractBaseClass>(serialized);

            Assert.IsInstanceOf<ConcreteClass>(deserialized);
            deserialized.Should().BeEquivalentTo(original);
        }

        [Test]
        public void Write_TypeDoesNotSpecifyKnownSubclasses_ThrowsException()
        {
            DoesNotSpecifyKnownTypes original = new UnknownSubtype();

            Assert.Throws<NotSupportedException>(() => JsonConvert.SerializeObject(original));
        }
    }

    public class NewtonsoftToSystemPolymorphicJsonConverterTest
    {
        [Test]
        public void WriteThenRead_AbstractBaseClassImplementation_DeserializesAsImplementation()
        {
            AbstractBaseClass original = new ConcreteClass();

            var serialized = JsonConvert.SerializeObject(original);
            var deserialized = JsonSerializer.Deserialize<AbstractBaseClass>(serialized);

            Assert.IsInstanceOf<ConcreteClass>(deserialized);
            deserialized.Should().BeEquivalentTo(original);
        }
    }

    public class SystemToNewtonsoftPolymorphicJsonConverterTest
    {
        [Test]
        public void WriteThenRead_AbstractBaseClassImplementation_DeserializesAsImplementation()
        {
            AbstractBaseClass original = new ConcreteClass();

            var serialized = JsonSerializer.Serialize(original);
            var deserialized = JsonConvert.DeserializeObject<AbstractBaseClass>(serialized);

            Assert.IsInstanceOf<ConcreteClass>(deserialized);
            deserialized.Should().BeEquivalentTo(original);
        }

        [Test]
        [Category("Integration")]
        public void WriteThenRead_DocumentFieldAuditWithValues_DeserializesCurrentAndPrevious()
        {
            DocumentAuditResponse original = new DocumentFieldAuditResponse
            {
                DocumentId = Guid.NewGuid(),
                Source = Guid.NewGuid().ToString(),
                Date = DateTime.Now,
                UserId = Guid.NewGuid().ToString(),
                Field = nameof(DocumentInformation.Attributes),
                CurrentValue = new
                {
                    PersonNumber = Guid.NewGuid().ToString(),
                    AccountNumber = Guid.NewGuid().ToString()
                },
                PreviousValue = new
                {
                    PersonNumber = Guid.NewGuid().ToString(),
                    AccountNumber = Guid.NewGuid().ToString()
                }
            };

            var deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(original));
            for (var i = 0; i <= 5; i++)
            {
                deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(deserialized));
            }

            var originalFieldAudit = original as DocumentFieldAuditResponse;
            var deserializedFieldAudit = deserialized as DocumentFieldAuditResponse;
            //caution: fluent assertions object comparison does not compare expando objects correctly as of v6.7.0
            //it will report the below four properties as missing, despite them having made it through two serializations
            Assert.AreEqual(originalFieldAudit.CurrentValue.PersonNumber, deserializedFieldAudit.CurrentValue.PersonNumber);
            Assert.AreEqual(originalFieldAudit.CurrentValue.AccountNumber, deserializedFieldAudit.CurrentValue.AccountNumber);
            Assert.AreEqual(originalFieldAudit.PreviousValue.PersonNumber, deserializedFieldAudit.PreviousValue.PersonNumber);
            Assert.AreEqual(originalFieldAudit.PreviousValue.AccountNumber, deserializedFieldAudit.PreviousValue.AccountNumber);
        }
        
        [Test]
        [Category("Integration")]
        public void WriteThenRead_DocumentFieldAuditWithNullValues_DeserializesCurrentAndPrevious()
        {
            DocumentAuditResponse original = new DocumentFieldAuditResponse
            {
                DocumentId = Guid.NewGuid(),
                Source = Guid.NewGuid().ToString(),
                Date = DateTime.Now,
                UserId = Guid.NewGuid().ToString(),
                Field = nameof(DocumentInformation.Attributes),
                CurrentValue = null,
                PreviousValue = null
            };

            var deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(original));
            for (var i = 0; i <= 5; i++)
            {
                deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(deserialized));
            }

            var originalFieldAudit = original as DocumentFieldAuditResponse;
            var deserializedFieldAudit = deserialized as DocumentFieldAuditResponse;
            //caution: fluent assertions object comparison does not compare expando objects correctly as of v6.7.0
            //it will report the below four properties as missing, despite them having made it through two serializations
            Assert.AreEqual(originalFieldAudit.CurrentValue, deserializedFieldAudit.CurrentValue);
            Assert.AreEqual(originalFieldAudit.PreviousValue, deserializedFieldAudit.PreviousValue);
        }
        
        [Test]
        [Category("Integration")]
        public void WriteThenRead_DocumentFieldAuditWithBooleanValues_DeserializesCurrentAndPrevious()
        {
            DocumentAuditResponse original = new DocumentFieldAuditResponse
            {
                DocumentId = Guid.NewGuid(),
                Source = Guid.NewGuid().ToString(),
                Date = DateTime.Now,
                UserId = Guid.NewGuid().ToString(),
                Field = nameof(DocumentInformation.Attributes),
                CurrentValue = true,
                PreviousValue = false
            };

            var deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(original));
            for (var i = 0; i <= 5; i++)
            {
                deserialized = JsonConvert.DeserializeObject<DocumentAuditResponse>(JsonSerializer.Serialize(deserialized));
            }

            var originalFieldAudit = original as DocumentFieldAuditResponse;
            var deserializedFieldAudit = deserialized as DocumentFieldAuditResponse;
            //caution: fluent assertions object comparison does not compare expando objects correctly as of v6.7.0
            //it will report the below four properties as missing, despite them having made it through two serializations
            Assert.AreEqual(originalFieldAudit.CurrentValue, deserializedFieldAudit.CurrentValue);
            Assert.AreEqual(originalFieldAudit.PreviousValue, deserializedFieldAudit.PreviousValue);
        }
    }
    

    [System.Text.Json.Serialization.JsonConverter(typeof(SystemPolymorphicJsonConverter<AbstractBaseClass>))]
    [Newtonsoft.Json.JsonConverter(typeof(NewtonsoftPolymorphicJsonConverter<AbstractBaseClass>))]
    [JsonKnownTypes(typeof(ConcreteClass))]
    private abstract class AbstractBaseClass
    {
        public Guid AbstractId { get; init; } = Guid.NewGuid();

        public NestedType Nested { get; init; } = new();
    }

    private class ConcreteClass : AbstractBaseClass
    {
        public Guid ConcreteId { get; init; } = Guid.NewGuid();
    }

    private class NestedType
    {
        public Guid NestedId { get; init; } = Guid.NewGuid();
    }

    [System.Text.Json.Serialization.JsonConverter(typeof(SystemPolymorphicJsonConverter<DoesNotSpecifyKnownTypes>))]
    [Newtonsoft.Json.JsonConverter(typeof(NewtonsoftPolymorphicJsonConverter<DoesNotSpecifyKnownTypes>))]
    private abstract class DoesNotSpecifyKnownTypes
    {
    }

    private class UnknownSubtype : DoesNotSpecifyKnownTypes
    {
    }
}