In progress

colaflow-api/tests/ColaFlow.Application.Tests/Commands/AssignStory/AssignStoryCommandHandlerTests.cs

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+using FluentAssertions;
+using Moq;
+using ColaFlow.Modules.ProjectManagement.Application.Commands.AssignStory;
+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.Commands.AssignStory;
+
+public class AssignStoryCommandHandlerTests
+{
+    private readonly Mock<IProjectRepository> _projectRepositoryMock;
+    private readonly Mock<IUnitOfWork> _unitOfWorkMock;
+    private readonly AssignStoryCommandHandler _handler;
+
+    public AssignStoryCommandHandlerTests()
+    {
+        _projectRepositoryMock = new Mock<IProjectRepository>();
+        _unitOfWorkMock = new Mock<IUnitOfWork>();
+        _handler = new AssignStoryCommandHandler(_projectRepositoryMock.Object, _unitOfWorkMock.Object);
+    }
+
+    [Fact]
+    public async Task Should_Assign_Story_Successfully()
+    {
+        // Arrange
+        var userId = UserId.Create();
+        var assigneeId = UserId.Create();
+        var project = Project.Create("Test Project", "Description", "TST", userId);
+        var epic = project.CreateEpic("Test Epic", "Epic Description", userId);
+        var story = epic.CreateStory("Test Story", "Description", TaskPriority.Medium, userId);
+
+        _projectRepositoryMock
+            .Setup(x => x.GetProjectWithStoryAsync(story.Id, It.IsAny<CancellationToken>()))
+            .ReturnsAsync(project);
+
+        var command = new AssignStoryCommand
+        {
+            StoryId = story.Id.Value,
+            AssigneeId = assigneeId.Value
+        };
+
+        // Act
+        var result = await _handler.Handle(command, CancellationToken.None);
+
+        // Assert
+        result.Should().NotBeNull();
+        result.AssigneeId.Should().Be(assigneeId.Value);
+        story.AssigneeId.Should().Be(assigneeId);
+
+        _projectRepositoryMock.Verify(x => x.Update(project), Times.Once);
+        _unitOfWorkMock.Verify(x => x.SaveChangesAsync(It.IsAny<CancellationToken>()), Times.Once);
+    }
+
+    [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 command = new AssignStoryCommand
+        {
+            StoryId = storyId.Value,
+            AssigneeId = Guid.NewGuid()
+        };
+
+        // Act
+        Func<Task> act = async () => await _handler.Handle(command, CancellationToken.None);
+
+        // Assert
+        await act.Should().ThrowAsync<NotFoundException>()
+            .WithMessage("*Story*");
+    }
+
+    [Fact]
+    public async Task Should_Reassign_Story_To_Different_User()
+    {
+        // Arrange
+        var userId = UserId.Create();
+        var firstAssignee = UserId.Create();
+        var secondAssignee = UserId.Create();
+        var project = Project.Create("Test Project", "Description", "TST", userId);
+        var epic = project.CreateEpic("Test Epic", "Epic Description", userId);
+        var story = epic.CreateStory("Test Story", "Description", TaskPriority.Medium, userId);
+
+        // First assign
+        story.AssignTo(firstAssignee);
+
+        _projectRepositoryMock
+            .Setup(x => x.GetProjectWithStoryAsync(story.Id, It.IsAny<CancellationToken>()))
+            .ReturnsAsync(project);
+
+        var command = new AssignStoryCommand
+        {
+            StoryId = story.Id.Value,
+            AssigneeId = secondAssignee.Value
+        };
+
+        // Act
+        var result = await _handler.Handle(command, CancellationToken.None);
+
+        // Assert
+        result.Should().NotBeNull();
+        result.AssigneeId.Should().Be(secondAssignee.Value);
+        story.AssigneeId.Should().Be(secondAssignee);
+    }
+}