spectre.console/test/Spectre.Console.Cli.Tests/Unit/CommandAppTests.Validation.cs

namespace Spectre.Console.Tests.Unit.Cli;

public sealed partial class CommandAppTests
{
    public sealed class Validation
    {
        [Fact]
        public void Should_Throw_If_Attribute_Validation_Fails()
        {
            // Given
            var app = new CommandApp();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddBranch<AnimalSettings>("animal", animal =>
                {
                    animal.AddCommand<DogCommand>("dog");
                    animal.AddCommand<HorseCommand>("horse");
                });
            });

            // When
            var result = Record.Exception(() => app.Run(new[] { "animal", "3", "dog", "7", "--name", "Rufus" }));

            // Then
            result.ShouldBeOfType<CommandRuntimeException>().And(e =>
            {
                e.Message.ShouldBe("Animals must have an even number of legs.");
            });
        }

        [Fact]
        public void Should_Throw_If_Settings_Validation_Fails()
        {
            // Given
            var app = new CommandApp();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddBranch<AnimalSettings>("animal", animal =>
                {
                    animal.AddCommand<DogCommand>("dog");
                    animal.AddCommand<HorseCommand>("horse");
                });
            });

            // When
            var result = Record.Exception(() => app.Run(new[] { "animal", "4", "dog", "7", "--name", "Tiger" }));

            // Then
            result.ShouldBeOfType<CommandRuntimeException>().And(e =>
            {
                e.Message.ShouldBe("Tiger is not a dog name!");
            });
        }

        [Fact]
        public void Should_Throw_If_Command_Validation_Fails()
        {
            // Given
            var app = new CommandApp();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddBranch<AnimalSettings>("animal", animal =>
                {
                    animal.AddCommand<DogCommand>("dog");
                    animal.AddCommand<HorseCommand>("horse");
                });
            });

            // When
            var result = Record.Exception(() => app.Run(new[] { "animal", "4", "dog", "101", "--name", "Rufus" }));

            // Then
            result.ShouldBeOfType<CommandRuntimeException>().And(e =>
            {
                e.Message.ShouldBe("Dog is too old...");
            });
        }
    }
}