ColaFlow/colaflow-api/tests/ColaFlow.Application.Tests/Queries/GetStoryById/GetStoryByIdQueryHandlerTests.cs

using FluentAssertions;
using Moq;
using ColaFlow.Modules.ProjectManagement.Application.Queries.GetStoryById;
using ColaFlow.Modules.ProjectManagement.Domain.Aggregates.ProjectAggregate;
using ColaFlow.Modules.ProjectManagement.Domain.Repositories;
using ColaFlow.Modules.ProjectManagement.Domain.ValueObjects;
using ColaFlow.Modules.ProjectManagement.Domain.Exceptions;

namespace ColaFlow.Application.Tests.Queries.GetStoryById;

public class GetStoryByIdQueryHandlerTests
{
    private readonly Mock<IProjectRepository> _projectRepositoryMock;
    private readonly GetStoryByIdQueryHandler _handler;

    public GetStoryByIdQueryHandlerTests()
    {
        _projectRepositoryMock = new Mock<IProjectRepository>();
        _handler = new GetStoryByIdQueryHandler(_projectRepositoryMock.Object);
    }

    [Fact]
    public async Task Should_Return_Story_With_Tasks()
    {
        // Arrange
        var userId = UserId.Create();
        var project = Project.Create(TenantId.Create(Guid.NewGuid()), "Test Project", "Description", "TST", userId);
        var epic = project.CreateEpic("Test Epic", "Epic Description", userId);
        var story = epic.CreateStory("Test Story", "Story Description", TaskPriority.High, userId);
        var task1 = story.CreateTask("Task 1", "Description 1", TaskPriority.Medium, userId);
        var task2 = story.CreateTask("Task 2", "Description 2", TaskPriority.Low, userId);

        _projectRepositoryMock
            .Setup(x => x.GetProjectWithStoryAsync(story.Id, It.IsAny<CancellationToken>()))
            .ReturnsAsync(project);

        var query = new GetStoryByIdQuery(story.Id.Value);

        // Act
        var result = await _handler.Handle(query, CancellationToken.None);

        // Assert
        result.Should().NotBeNull();
        result.Id.Should().Be(story.Id.Value);
        result.Title.Should().Be("Test Story");
        result.Description.Should().Be("Story Description");
        result.Priority.Should().Be("High");
        result.Tasks.Should().HaveCount(2);
        result.Tasks.Should().Contain(t => t.Id == task1.Id.Value);
        result.Tasks.Should().Contain(t => t.Id == task2.Id.Value);
    }

    [Fact]
    public async Task Should_Fail_When_Story_Not_Found()
    {
        // Arrange
        var storyId = StoryId.Create();
        _projectRepositoryMock
            .Setup(x => x.GetProjectWithStoryAsync(storyId, It.IsAny<CancellationToken>()))
            .ReturnsAsync((Project?)null);

        var query = new GetStoryByIdQuery(storyId.Value);

        // Act
        Func<Task> act = async () => await _handler.Handle(query, CancellationToken.None);

        // Assert
        await act.Should().ThrowAsync<NotFoundException>()
            .WithMessage("*Story*");
    }
}