DD.WellWorkover.Cloud/AsbCloudWebApi.Tests/ReflectionExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AsbCloudWebApi.Tests
{
    public static class ReflectionExtensions
    {
        private static readonly Dictionary<Type, object> _commonTypeDictionary = new()
        {
            { typeof(int), default(int) },
            { typeof(Guid), default(Guid) },
            { typeof(DateOnly), default(DateOnly) },
            { typeof(DateTime), default(DateTime) },
            { typeof(DateTimeOffset), default(DateTimeOffset) },
            { typeof(TimeOnly), default(TimeOnly) },
            { typeof(long), default(long) },
            { typeof(bool), default(bool) },
            { typeof(double), default(double) },
            { typeof(short), default(short) },
            { typeof(float), default(float) },
            { typeof(byte), default(byte) },
            { typeof(char), default(char) },
            { typeof(uint), default(uint) },
            { typeof(ushort), default(ushort) },
            { typeof(ulong), default(ulong) },
            { typeof(sbyte), default(sbyte) }
        };

        public static object? GetDefaultValue(this Type type)
        {
            if (!type.IsValueType)
            {
                return null;
            }

            return _commonTypeDictionary.TryGetValue(type, out var value)
                ? value
                : Activator.CreateInstance(type);
        }

        public static bool IsDefaultValue(this Type type, object? value)
            => (value?.Equals(type.GetDefaultValue()) != false);
    }
}