lmxopcua/tests/Client/ZB.MOM.WW.OtOpcUa.Client.CLI.Tests/ConnectCommandTests.cs

using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Client.CLI.Commands;
using ZB.MOM.WW.OtOpcUa.Client.CLI.Tests.Fakes;
using ZB.MOM.WW.OtOpcUa.Client.Shared.Models;

namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Tests;

public class ConnectCommandTests
{
    /// <summary>Verifies that execute prints connection info.</summary>
    [Fact]
    public async Task Execute_PrintsConnectionInfo()
    {
        var fakeService = new FakeOpcUaClientService
        {
            ConnectionInfoResult = new ConnectionInfo(
                "opc.tcp://testhost:4840",
                "MyServer",
                "SignAndEncrypt",
                "http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256",
                "session-42",
                "MySession")
        };
        var factory = new FakeOpcUaClientServiceFactory(fakeService);
        var command = new ConnectCommand(factory)
        {
            Url = "opc.tcp://testhost:4840"
        };

        using var console = TestConsoleHelper.CreateConsole();
        await command.ExecuteAsync(console);

        var output = TestConsoleHelper.GetOutput(console);
        output.ShouldContain("Connected to: opc.tcp://testhost:4840");
        output.ShouldContain("Server: MyServer");
        output.ShouldContain("Security Mode: SignAndEncrypt");
        output.ShouldContain("Security Policy: http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256");
        output.ShouldContain("Connection successful.");
    }

    /// <summary>Verifies that execute calls connect and disconnect.</summary>
    [Fact]
    public async Task Execute_CallsConnectAndDisconnect()
    {
        var fakeService = new FakeOpcUaClientService();
        var factory = new FakeOpcUaClientServiceFactory(fakeService);
        var command = new ConnectCommand(factory)
        {
            Url = "opc.tcp://localhost:4840"
        };

        using var console = TestConsoleHelper.CreateConsole();
        await command.ExecuteAsync(console);

        fakeService.ConnectCalled.ShouldBeTrue();
        fakeService.DisconnectCalled.ShouldBeTrue();
        fakeService.DisposeCalled.ShouldBeTrue();
    }

    /// <summary>Verifies that execute disconnects on error.</summary>
    [Fact]
    public async Task Execute_DisconnectsOnError()
    {
        var fakeService = new FakeOpcUaClientService
        {
            ConnectException = new InvalidOperationException("Connection refused")
        };
        var factory = new FakeOpcUaClientServiceFactory(fakeService);
        var command = new ConnectCommand(factory)
        {
            Url = "opc.tcp://localhost:4840"
        };

        using var console = TestConsoleHelper.CreateConsole();
        // The command should propagate the exception but still clean up.
        // Since connect fails, service is null in finally, so no disconnect.
        await Should.ThrowAsync<InvalidOperationException>(async () => await command.ExecuteAsync(console));
    }
}