lmxopcua/tests/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.AbCip.Cli.Tests/AbCipTransportOptionTests.cs

using CliFx;
using CliFx.Attributes;
using CliFx.Infrastructure;
using Shouldly;
using Xunit;

namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip.Cli.Tests;

/// <summary>The CLI <c>--transport</c> flag reaches <see cref="AbCipDriverOptions.Transport"/>.</summary>
[Trait("Category", "Unit")]
public sealed class AbCipTransportOptionTests
{
    [Command("capture-transport")]
    private sealed class CapturingCommand : AbCipCommandBase
    {
        public static AbCipTransport? Captured;

        public override ValueTask ExecuteAsync(IConsole console)
        {
            Captured = BuildOptions([]).Transport;
            return default;
        }
    }

    /// <summary>Verifies the default is libplctag when the flag is absent.</summary>
    [Fact]
    public async Task Transport_defaults_to_libplctag()
    {
        CapturingCommand.Captured = null;
        using var console = new FakeInMemoryConsole();
        var app = new CliApplicationBuilder().AddCommand(typeof(CapturingCommand)).UseConsole(console).Build();

        var exit = await app.RunAsync(["capture-transport", "--gateway", "ab://1.2.3.4/1,0"]);

        exit.ShouldBe(0, console.ReadErrorString());
        CapturingCommand.Captured.ShouldBe(AbCipTransport.Libplctag);
    }

    /// <summary>Verifies CliFx parses <c>--transport</c> (case-insensitive) into the options.</summary>
    [Theory]
    [InlineData("native", AbCipTransport.Native)]
    [InlineData("Native", AbCipTransport.Native)]
    [InlineData("libplctag", AbCipTransport.Libplctag)]
    public async Task Transport_flag_is_parsed_by_the_cli(string value, AbCipTransport expected)
    {
        CapturingCommand.Captured = null;
        using var console = new FakeInMemoryConsole();
        var app = new CliApplicationBuilder().AddCommand(typeof(CapturingCommand)).UseConsole(console).Build();

        var exit = await app.RunAsync(["capture-transport", "--gateway", "ab://1.2.3.4/1,0", "--transport", value]);

        exit.ShouldBe(0, console.ReadErrorString());
        CapturingCommand.Captured.ShouldBe(expected);
    }
}