Add self-service account management commands (delete, update username/email/password/profile)

web/backend/Features/Features.Auth.Tests/Commands/DeleteAccountHandlerTests.cs

@@ -0,0 +1,74 @@
+using Domain.Exceptions;
+using Features.Auth.Commands.DeleteAccount;
+using Features.Auth.Identity;
+using Features.Auth.Tests.TestSupport;
+using FluentAssertions;
+using Microsoft.AspNetCore.Identity;
+using Moq;
+
+namespace Features.Auth.Tests.Commands;
+
+public class DeleteAccountHandlerTests
+{
+    private readonly DeleteAccountHandler _handler;
+    private readonly Mock<UserManager<ApplicationUser>> _userManagerMock;
+
+    public DeleteAccountHandlerTests()
+    {
+        _userManagerMock = UserManagerMockFactory.Create();
+        _handler = new DeleteAccountHandler(_userManagerMock.Object);
+    }
+
+    [Fact]
+    public async Task Handle_WithExistingUser_DeletesAccount()
+    {
+        Guid userId = Guid.NewGuid();
+        ApplicationUser user = new() { Id = userId };
+
+        _userManagerMock.Setup(x => x.FindByIdAsync(userId.ToString())).ReturnsAsync(user);
+        _userManagerMock.Setup(x => x.DeleteAsync(user)).ReturnsAsync(IdentityResult.Success);
+
+        await _handler.Handle(new DeleteAccountCommand(userId), CancellationToken.None);
+
+        _userManagerMock.Verify(x => x.DeleteAsync(user), Times.Once);
+    }
+
+    [Fact]
+    public async Task Handle_WithNonExistentUser_ThrowsNotFoundException()
+    {
+        Guid userId = Guid.NewGuid();
+        _userManagerMock
+            .Setup(x => x.FindByIdAsync(userId.ToString()))
+            .ReturnsAsync((ApplicationUser?)null);
+
+        Func<Task> act = async () =>
+            await _handler.Handle(new DeleteAccountCommand(userId), CancellationToken.None);
+
+        await act.Should().ThrowAsync<NotFoundException>();
+    }
+
+    [Fact]
+    public async Task Handle_WithDependentRecords_ThrowsConflictException()
+    {
+        Guid userId = Guid.NewGuid();
+        ApplicationUser user = new() { Id = userId };
+
+        _userManagerMock.Setup(x => x.FindByIdAsync(userId.ToString())).ReturnsAsync(user);
+        _userManagerMock
+            .Setup(x => x.DeleteAsync(user))
+            .ReturnsAsync(
+                IdentityResult.Failed(
+                    new IdentityError
+                    {
+                        Code = "AccountHasDependentRecords",
+                        Description = "still referenced",
+                    }
+                )
+            );
+
+        Func<Task> act = async () =>
+            await _handler.Handle(new DeleteAccountCommand(userId), CancellationToken.None);
+
+        await act.Should().ThrowAsync<ConflictException>();
+    }
+}