using System.ComponentModel.DataAnnotations.Schema;
using System.Globalization;
using System.Reflection;
using System.Text.RegularExpressions;

namespace DD.Persistence.Test;
public class TableAttributeShould
{
    private const string Separator = "_";
    private const string TargetAssembly = "DD.Persistence.Database";
    private const string TargetNamespace = "DD.Persistence.Database.Entity";

    [Fact]
    public void Test() 
    {
        Assembly assembly = Assembly.Load(TargetAssembly);
        var typesInNamespace = assembly.GetTypes()
            .Where(t => t.IsClass && t.Namespace == TargetNamespace)
            .ToList();

        foreach (var type in typesInNamespace)
        {
            var tableAttribute = type.GetCustomAttribute<TableAttribute>();
            Assert.NotNull(tableAttribute);

            var partsOfClassName = Regex
                .Split(type.Name, @"(?=[A-Z])")
                .Where(s => s != string.Empty)
                .Select(s => s.ToLower(CultureInfo.InvariantCulture));
            var expectedClassName = string.Join(Separator, partsOfClassName);
            Assert.Equal(expectedClassName, tableAttribute.Name);
        }
    }
}