using NSubstitute; using TeleWave.Application.Admin.Roles.ChangeUserRole; using TeleWave.Application.Common.Interfaces; using TeleWave.Application.Common.Models; using Xunit; namespace TeleWave.Application.Tests.Admin.Roles; public class ChangeUserRoleCommandHandlerTests { private readonly IRoleService _roleService = Substitute.For(); [Fact] public async Task Handle_DelegatesToRoleService() { var userId = Guid.NewGuid(); var roleId = Guid.NewGuid(); _roleService .ChangeUserRoleAsync(userId, roleId, Arg.Any()) .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()); } }