using System;
using Junction.Domain;
using Xunit;

namespace Junction.Tests.Unit
{
    public class OperationErrorTests
    {
        [Fact]
        public void Ctor_StoresFields()
        {
            var err = new OperationError("E01", "Repo", "boom");

            Assert.Equal("E01", err.Code);
            Assert.Equal("Repo", err.Source);
            Assert.Equal("boom", err.Message);
        }

        [Fact]
        public void Ctor_SetsTimestamp()
        {
            var before = DateTime.Now;
            var err = new OperationError("E", "S", "M");
            var after = DateTime.Now;

            Assert.InRange(err.At, before, after);
        }

        [Theory]
        [InlineData(null, null, null)]
        [InlineData(null, "S", null)]
        public void Ctor_NullsBecomeEmptyStrings(string? code, string? source, string? message)
        {
            var err = new OperationError(code!, source!, message!);

            Assert.NotNull(err.Code);
            Assert.NotNull(err.Source);
            Assert.NotNull(err.Message);
        }

        [Fact]
        public void Of_CreatesErrorWithEmptyCode()
        {
            var err = OperationError.Of("Repo", "boom");

            Assert.Equal("", err.Code);
            Assert.Equal("Repo", err.Source);
            Assert.Equal("boom", err.Message);
        }

        [Fact]
        public void ToString_ContainsFields()
        {
            var err = new OperationError("E01", "Repo", "boom");

            Assert.Contains("E01", err.ToString());
            Assert.Contains("Repo", err.ToString());
            Assert.Contains("boom", err.ToString());
        }
    }
}