PnvPanel/backend/tests/PnvPanel.Application.Tests/Admin/Users/ChangeUserRoleCommandHandlerTests.cs

using NSubstitute;
using PnvPanel.Application.Admin.Users;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Users;

public class ChangeUserRoleCommandHandlerTests
{
    private readonly IRoleService _roleService = Substitute.For<IRoleService>();

    [Fact]
    public async Task Handle_DelegatesToRoleServiceAndReturnsSuccess()
    {
        var userId = Guid.NewGuid();
        var roleId = Guid.NewGuid();
        _roleService.ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>()).Returns(Result.Success());

        var handler = new ChangeUserRoleCommandHandler(_roleService);

        var result = await handler.Handle(new ChangeUserRoleCommand(userId, roleId), CancellationToken.None);

        Assert.True(result.IsSuccess);
        await _roleService.Received(1).ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenRoleServiceFails_PropagatesFailure()
    {
        var userId = Guid.NewGuid();
        var roleId = Guid.NewGuid();
        var error = UserErrors.NotFound;
        _roleService.ChangeUserRoleAsync(userId, roleId, Arg.Any<CancellationToken>()).Returns(Result.Failure(error));

        var handler = new ChangeUserRoleCommandHandler(_roleService);

        var result = await handler.Handle(new ChangeUserRoleCommand(userId, roleId), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(error, result.Error);
    }
}