Issue777Tests.cs

using FluentAssertions;
using Xunit;

// Issue #777
// Record types should be usable as immutable options types.

namespace CommandLine.Tests.Unit
{
#if NET5_0_OR_GREATER
    public class Issue777Tests
    {
        [Fact]
        public void Immutable_record_types_should_work()
        {
            var arguments = new[] { "--option1=test", "--option2=5", "--option3" };
            var result = Parser.Default
                .ParseArguments<Options>(arguments);

            Assert.Empty(result.Errors);
            Assert.Equal(ParserResultType.Parsed, result.Tag);

            result.WithParsed(options =>
            {
                options.Option1.Should().Be("test");
                options.Option2.Should().Be(5);
                options.Option3.Should().Be(true);
            });
        }

        private record Options(
            [property: Option]
            string Option1,

            [property: Option]
            int Option2,

            [property: Option]
            bool Option3
        );
    }
#endif
}