WIP feat: member user relation

test/accounts/user_member_integration_test.exs

@@ -0,0 +1,77 @@
+defmodule Mv.Accounts.UserMemberIntegrationTest do
+  use Mv.DataCase, async: true
+  alias Mv.Accounts
+  alias Mv.Membership
+  alias Mv.Accounts.User.MemberCreationNotifier
+
+  describe "User-Member-Relation" do
+    test "ein User kann einem Member zugeordnet werden" do
+      {:ok, member} =
+        Membership.create_member(%{
+          first_name: "Max",
+          last_name: "Mustermann",
+          email: "max@example.com"
+        })
+
+      {:ok, user} = Accounts.create_user(%{email: "user1@example.com", member_id: member.id})
+      assert user.member_id == member.id
+    end
+
+    test "ein Member kann nur einem User zugeordnet werden (unique constraint)" do
+      {:ok, member} =
+        Membership.create_member(%{
+          first_name: "Anna",
+          last_name: "Test",
+          email: "anna@example.com"
+        })
+
+      {:ok, user1} = Accounts.create_user(%{email: "user2@example.com", member_id: member.id})
+      assert user1.member_id == member.id
+
+      {:error, %Ash.Error.Invalid{errors: errors}} =
+        Accounts.create_user(%{email: "user3@example.com", member_id: member.id})
+
+      assert Enum.any?(errors, fn error ->
+               error.message =~ "already been taken" or error.field == :member_id
+             end)
+    end
+
+    test "ein User ohne Member ist nicht erlaubt (bei Registrierung/Erstellung)" do
+      # Create user without member first
+      result = Accounts.create_user(%{email: "user4@example.com"})
+
+      case result do
+        {:ok, user} ->
+          # User is created but doesn't have member yet
+          assert user.member_id == nil
+
+          # Manually trigger the notifier to simulate automatic member creation
+          notification = %Ash.Notifier.Notification{
+            action: %{name: :create_user},
+            resource: Mv.Accounts.User,
+            data: user
+          }
+
+          assert :ok = MemberCreationNotifier.notify(notification)
+
+          # Reload user and verify member was created and assigned
+          user = Ash.reload!(user, domain: Mv.Accounts)
+          assert user.member_id, "User should have a member_id assigned after notifier"
+
+        {:error, _} ->
+          flunk("User creation should succeed")
+      end
+    end
+
+    test "ein Member kann ohne User existieren" do
+      {:ok, member} =
+        Membership.create_member(%{
+          first_name: "Lisa",
+          last_name: "Solo",
+          email: "lisa@example.com"
+        })
+
+      assert member.id
+    end
+  end
+end