tuitio/test/UnitTests/Tuitio.Application.Tests/CommandHandlerTests.cs

// Copyright (c) 2020 Tudor Stanciu

using MediatR;
using Microsoft.Extensions.DependencyInjection;
using Tuitio.Application.CommandHandlers;
using Tuitio.Application.Tests.Fixtures;
using Tuitio.PublishedLanguage.Constants;
using Xunit;

namespace Tuitio.Application.Tests
{
    public class CommandHandlerTests : IClassFixture<DependencyInjectionFixture>, IDisposable
    {
        private readonly IServiceScope _tuitioScope;
        private readonly IMediator _mediator;

        public CommandHandlerTests(DependencyInjectionFixture fixture)
        {
            _tuitioScope = fixture.ServiceProvider.GetRequiredService<IServiceScopeFactory>().CreateScope();
            _mediator = _tuitioScope.ServiceProvider.GetRequiredService<IMediator>();
        }

        public void Dispose()
        {
            _tuitioScope.Dispose();
        }

        [Fact]
        public async Task AccountLoginHandler_Handle_Success()
        {
            // Arrange
            var userName = "tuitio.user";
            var password = "pass123";
            var command = new AccountLoginHandler.Command(userName, password);

            // Act
            var result = await _mediator.Send(command);

            // Assert
            Assert.NotNull(result);
            Assert.NotNull(result.Result);
            Assert.Null(result.Error);
            Assert.NotEmpty(result.Result.Token);
            Assert.True(result.Result.ExpiresIn > 0, "Token expiration must be a positive number.");
        }

        [Fact]
        public async Task AccountLoginHandler_Handle_Failed()
        {
            // Arrange
            var userName = "tuitio.user";
            var password = "wrong_password";
            var command = new AccountLoginHandler.Command(userName, password);

            // Act
            var result = await _mediator.Send(command);

            // Assert
            Assert.NotNull(result);
            Assert.Null(result.Result);
            Assert.NotNull(result.Error);
            Assert.NotEmpty(result.Error);
            Assert.Equal(EnvelopeError.BAD_CREDENTIALS, result.Error);
        }
    }
}