RackPeek/Tests/Hardware/AddServerUseCaseTests.cs

using NSubstitute;
using RackPeek.Domain.Resources.Hardware;
using RackPeek.Domain.Resources.Hardware.Crud;
using RackPeek.Domain.Resources.Hardware.Models;

namespace Tests.Hardware;

public class AddServerUseCaseTests
{
    [Fact]
    public async Task ExecuteAsync_Adds_new_server_when_not_exists()
    {
        // Arrange
        var repo = Substitute.For<IHardwareRepository>();
        repo.GetByNameAsync("node01").Returns((RackPeek.Domain.Resources.Hardware.Models.Hardware?)null);

        var sut = new AddServerUseCase(repo);

        // Act
        await sut.ExecuteAsync(
            name: "node01",
            cpuModel: "Xeon E3",
            cores: 4,
            threads: 8,
            ramGb: 32,
            ipmi: true
        );

        // Assert
        await repo.Received(1).AddAsync(Arg.Is<Server>(s =>
            s.Name == "node01" &&
            s.Cpus != null &&
            s.Cpus.Count == 1 &&
            s.Cpus[0].Model == "Xeon E3" &&
            s.Cpus[0].Cores == 4 &&
            s.Cpus[0].Threads == 8 &&
            s.Ram.Size == 32 &&
            s.Ipmi == true
        ));
    }

    [Fact]
    public async Task ExecuteAsync_Throws_if_server_already_exists()
    {
        // Arrange
        var repo = Substitute.For<IHardwareRepository>();
        repo.GetByNameAsync("node01").Returns(new Server { Name = "node01" });

        var sut = new AddServerUseCase(repo);

        // Act
        var ex = await Assert.ThrowsAsync<InvalidOperationException>(async () =>
            await sut.ExecuteAsync(
                name: "node01",
                cpuModel: "Xeon E3",
                cores: 4,
                threads: 8,
                ramGb: 32,
                ipmi: true
            )
        );

        // Assert
        Assert.Equal("Server 'node01' already exists.", ex.Message);
        await repo.DidNotReceive().AddAsync(Arg.Any<Server>());
    }
}