NixOS_WindowsWrapper/tests/NixWslWrapper.Tests/CoreTests.cs

using System;
using NixWslWrapper.Core.Domain;
using Xunit;

namespace NixWslWrapper.Tests
{
    public class CoreTests
    {
        [Fact]
        public void WslTarget_ValidParameters_ShouldConstructCorrectly()
        {
            var target = new WslTarget("Debian", "root", "/some/path");
            Assert.Equal("Debian", target.Distribution);
            Assert.Equal("root", target.User);
            Assert.Equal("/some/path", target.NixProfilePath);
        }

        [Theory]
        [InlineData("", "root", "/path")]
        [InlineData("Debian", "", "/path")]
        [InlineData("Debian", "root", "")]
        [InlineData(null, "root", "/path")]
        [InlineData("Debian", null, "/path")]
        [InlineData("Debian", "root", null)]
        public void WslTarget_InvalidParameters_ShouldThrowArgumentException(string? distro, string? user, string? profile)
        {
            Assert.Throws<ArgumentException>(() => new WslTarget(distro!, user!, profile!));
        }

        [Fact]
        public void WslTarget_Equality_ShouldBeTrueForSameValues()
        {
            var target1 = new WslTarget("Debian", "root", "/path");
            var target2 = new WslTarget("debian", "ROOT", "/path"); // case-insensitive for distro/user
            Assert.Equal(target1, target2);
        }

        [Fact]
        public void NixArguments_EmptyArgs_ShouldReturnEmptyEscapedString()
        {
            var args = new NixArguments(Array.Empty<string>());
            Assert.Equal(string.Empty, args.ToEscapedString());
        }

        [Fact]
        public void NixArguments_WithSpecialCharacters_ShouldEscapeDoubleQuotes()
        {
            var args = new NixArguments(new[] { "run", "nixpkgs#hello", "--argstr", "msg", "hello \"world\"" });
            string escaped = args.ToEscapedString();
            Assert.Equal("\"run\" \"nixpkgs#hello\" \"--argstr\" \"msg\" \"hello \\\"world\\\"\"", escaped);
        }

        [Fact]
        public void ExecutionResult_Success_ShouldSetCorrectProperties()
        {
            var result = ExecutionResult.Success();
            Assert.True(result.IsSuccess);
            Assert.Equal(0, result.ExitCode);
            Assert.Null(result.ErrorMessage);
        }

        [Fact]
        public void ExecutionResult_Failure_ShouldSetCorrectProperties()
        {
            var result = ExecutionResult.Failure(5, "Access Denied");
            Assert.False(result.IsSuccess);
            Assert.Equal(5, result.ExitCode);
            Assert.Equal("Access Denied", result.ErrorMessage);
        }
    }
}