test: add Member resource policy tests

test/mv/membership/member_policies_test.exs

@@ -0,0 +1,418 @@
+defmodule Mv.Membership.MemberPoliciesTest do
+  @moduledoc """
+  Tests for Member resource authorization policies.
+
+  Tests all 4 permission sets (own_data, read_only, normal_user, admin)
+  and verifies that policies correctly enforce access control based on
+  user roles and permission sets.
+  """
+  # async: false because we need database commits to be visible across queries
+  # in the same test (especially for unlinked members)
+  use Mv.DataCase, async: false
+
+  alias Mv.Membership
+  alias Mv.Accounts
+  alias Mv.Authorization
+
+  require Ash.Query
+
+  # Helper to create a role with a specific permission set
+  defp create_role_with_permission_set(permission_set_name) do
+    role_name = "Test Role #{permission_set_name} #{System.unique_integer([:positive])}"
+
+    case Authorization.create_role(%{
+           name: role_name,
+           description: "Test role for #{permission_set_name}",
+           permission_set_name: permission_set_name
+         }) do
+      {:ok, role} -> role
+      {:error, error} -> raise "Failed to create role: #{inspect(error)}"
+    end
+  end
+
+  # Helper to create a user with a specific permission set
+  # Returns user with role preloaded (required for authorization)
+  defp create_user_with_permission_set(permission_set_name) do
+    # Create role with permission set
+    role = create_role_with_permission_set(permission_set_name)
+
+    # Create user
+    {:ok, user} =
+      Accounts.User
+      |> Ash.Changeset.for_create(:register_with_password, %{
+        email: "user#{System.unique_integer([:positive])}@example.com",
+        password: "testpassword123"
+      })
+      |> Ash.create()
+
+    # Assign role to user
+    {:ok, user} =
+      user
+      |> Ash.Changeset.for_update(:update, %{})
+      |> Ash.Changeset.manage_relationship(:role, role, type: :append_and_remove)
+      |> Ash.update()
+
+    # Reload user with role preloaded (critical for authorization!)
+    {:ok, user_with_role} = Ash.load(user, :role, domain: Mv.Accounts)
+    user_with_role
+  end
+
+  # Helper to create an admin user (for creating test fixtures)
+  defp create_admin_user do
+    create_user_with_permission_set("admin")
+  end
+
+  # Helper to create a member linked to a user
+  defp create_linked_member_for_user(user) do
+    admin = create_admin_user()
+
+    # Create member
+    # NOTE: We need to ensure the member is actually persisted to the database
+    # before we try to link it. Ash may delay writes, so we explicitly return the struct.
+    {:ok, member} =
+      Membership.Member
+      |> Ash.Changeset.for_create(:create_member, %{
+        first_name: "Linked",
+        last_name: "Member",
+        email: "linked#{System.unique_integer([:positive])}@example.com"
+      })
+      |> Ash.create(actor: admin, return_notifications?: false)
+
+    # Link member to user (User.member_id = member.id)
+    # We use force_change_attribute because the member already exists and we just
+    # need to set the foreign key. This avoids the issue where manage_relationship
+    # tries to query the member without the actor context.
+    result =
+      user
+      |> Ash.Changeset.for_update(:update, %{})
+      |> Ash.Changeset.force_change_attribute(:member_id, member.id)
+      |> Ash.update(actor: admin, domain: Mv.Accounts, return_notifications?: false)
+
+    {:ok, _user} = result
+
+    # Return the member struct directly - no need to reload since we just created it
+    # and we're in the same transaction/sandbox
+    member
+  end
+
+  # Helper to create an unlinked member (no user relationship)
+  defp create_unlinked_member do
+    admin = create_admin_user()
+
+    {:ok, member} =
+      Membership.Member
+      |> Ash.Changeset.for_create(:create_member, %{
+        first_name: "Unlinked",
+        last_name: "Member",
+        email: "unlinked#{System.unique_integer([:positive])}@example.com"
+      })
+      |> Ash.create(actor: admin)
+
+    member
+  end
+
+  describe "own_data permission set (Mitglied)" do
+    setup do
+      user = create_user_with_permission_set("own_data")
+      linked_member = create_linked_member_for_user(user)
+      unlinked_member = create_unlinked_member()
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+      {:ok, user} = Ash.load(user, :member, domain: Mv.Accounts)
+
+      %{user: user, linked_member: linked_member, unlinked_member: unlinked_member}
+    end
+
+    test "can read linked member", %{user: user, linked_member: linked_member} do
+      {:ok, member} =
+        Ash.get(Membership.Member, linked_member.id, actor: user, domain: Mv.Membership)
+
+      assert member.id == linked_member.id
+    end
+
+    test "can update linked member", %{user: user, linked_member: linked_member} do
+      {:ok, updated_member} =
+        linked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update(actor: user)
+
+      assert updated_member.first_name == "Updated"
+    end
+
+    test "cannot read unlinked member (returns forbidden)", %{
+      user: user,
+      unlinked_member: unlinked_member
+    } do
+      # Note: With auto_filter policies, when a user tries to read a member that doesn't
+      # match the filter (id == actor.member_id), Ash returns NotFound, not Forbidden.
+      # This is the expected behavior - the filter makes the record "invisible" to the user.
+      assert_raise Ash.Error.Invalid, fn ->
+        Ash.get!(Membership.Member, unlinked_member.id, actor: user, domain: Mv.Membership)
+      end
+    end
+
+    test "cannot update unlinked member (returns forbidden)", %{
+      user: user,
+      unlinked_member: unlinked_member
+    } do
+      assert_raise Ash.Error.Forbidden, fn ->
+        unlinked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update!(actor: user)
+      end
+    end
+
+    test "list members returns only linked member", %{user: user, linked_member: linked_member} do
+      {:ok, members} = Ash.read(Membership.Member, actor: user, domain: Mv.Membership)
+
+      # Should only return the linked member (scope :linked filters)
+      assert length(members) == 1
+      assert hd(members).id == linked_member.id
+    end
+
+    test "cannot create member (returns forbidden)", %{user: user} do
+      assert_raise Ash.Error.Forbidden, fn ->
+        Membership.Member
+        |> Ash.Changeset.for_create(:create_member, %{
+          first_name: "New",
+          last_name: "Member",
+          email: "new#{System.unique_integer([:positive])}@example.com"
+        })
+        |> Ash.create!(actor: user)
+      end
+    end
+
+    test "cannot destroy member (returns forbidden)", %{user: user, linked_member: linked_member} do
+      assert_raise Ash.Error.Forbidden, fn ->
+        Ash.destroy!(linked_member, actor: user)
+      end
+    end
+  end
+
+  describe "read_only permission set (Vorstand/Buchhaltung)" do
+    setup do
+      user = create_user_with_permission_set("read_only")
+      linked_member = create_linked_member_for_user(user)
+      unlinked_member = create_unlinked_member()
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+
+      %{user: user, linked_member: linked_member, unlinked_member: unlinked_member}
+    end
+
+    test "can read all members", %{
+      user: user,
+      linked_member: linked_member,
+      unlinked_member: unlinked_member
+    } do
+      {:ok, members} = Ash.read(Membership.Member, actor: user, domain: Mv.Membership)
+
+      # Should return all members (scope :all)
+      member_ids = Enum.map(members, & &1.id)
+      assert linked_member.id in member_ids
+      assert unlinked_member.id in member_ids
+    end
+
+    test "can read individual member", %{user: user, unlinked_member: unlinked_member} do
+      {:ok, member} =
+        Ash.get(Membership.Member, unlinked_member.id, actor: user, domain: Mv.Membership)
+
+      assert member.id == unlinked_member.id
+    end
+
+    test "cannot create member (returns forbidden)", %{user: user} do
+      assert_raise Ash.Error.Forbidden, fn ->
+        Membership.Member
+        |> Ash.Changeset.for_create(:create_member, %{
+          first_name: "New",
+          last_name: "Member",
+          email: "new#{System.unique_integer([:positive])}@example.com"
+        })
+        |> Ash.create!(actor: user)
+      end
+    end
+
+    test "cannot update any member (returns forbidden)", %{
+      user: user,
+      linked_member: linked_member
+    } do
+      assert_raise Ash.Error.Forbidden, fn ->
+        linked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update!(actor: user)
+      end
+    end
+
+    test "cannot destroy any member (returns forbidden)", %{
+      user: user,
+      unlinked_member: unlinked_member
+    } do
+      assert_raise Ash.Error.Forbidden, fn ->
+        Ash.destroy!(unlinked_member, actor: user)
+      end
+    end
+  end
+
+  describe "normal_user permission set (Kassenwart)" do
+    setup do
+      user = create_user_with_permission_set("normal_user")
+      linked_member = create_linked_member_for_user(user)
+      unlinked_member = create_unlinked_member()
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+
+      %{user: user, linked_member: linked_member, unlinked_member: unlinked_member}
+    end
+
+    test "can read all members", %{
+      user: user,
+      linked_member: linked_member,
+      unlinked_member: unlinked_member
+    } do
+      {:ok, members} = Ash.read(Membership.Member, actor: user, domain: Mv.Membership)
+
+      # Should return all members (scope :all)
+      member_ids = Enum.map(members, & &1.id)
+      assert linked_member.id in member_ids
+      assert unlinked_member.id in member_ids
+    end
+
+    test "can create member", %{user: user} do
+      {:ok, member} =
+        Membership.Member
+        |> Ash.Changeset.for_create(:create_member, %{
+          first_name: "New",
+          last_name: "Member",
+          email: "new#{System.unique_integer([:positive])}@example.com"
+        })
+        |> Ash.create(actor: user)
+
+      assert member.first_name == "New"
+    end
+
+    test "can update any member", %{user: user, unlinked_member: unlinked_member} do
+      {:ok, updated_member} =
+        unlinked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update(actor: user)
+
+      assert updated_member.first_name == "Updated"
+    end
+
+    test "cannot destroy member (safety - not in permission set)", %{
+      user: user,
+      unlinked_member: unlinked_member
+    } do
+      assert_raise Ash.Error.Forbidden, fn ->
+        Ash.destroy!(unlinked_member, actor: user)
+      end
+    end
+  end
+
+  describe "admin permission set" do
+    setup do
+      user = create_user_with_permission_set("admin")
+      linked_member = create_linked_member_for_user(user)
+      unlinked_member = create_unlinked_member()
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+
+      %{user: user, linked_member: linked_member, unlinked_member: unlinked_member}
+    end
+
+    test "can read all members", %{
+      user: user,
+      linked_member: linked_member,
+      unlinked_member: unlinked_member
+    } do
+      {:ok, members} = Ash.read(Membership.Member, actor: user, domain: Mv.Membership)
+
+      # Should return all members (scope :all)
+      member_ids = Enum.map(members, & &1.id)
+      assert linked_member.id in member_ids
+      assert unlinked_member.id in member_ids
+    end
+
+    test "can create member", %{user: user} do
+      {:ok, member} =
+        Membership.Member
+        |> Ash.Changeset.for_create(:create_member, %{
+          first_name: "New",
+          last_name: "Member",
+          email: "new#{System.unique_integer([:positive])}@example.com"
+        })
+        |> Ash.create(actor: user)
+
+      assert member.first_name == "New"
+    end
+
+    test "can update any member", %{user: user, unlinked_member: unlinked_member} do
+      {:ok, updated_member} =
+        unlinked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update(actor: user)
+
+      assert updated_member.first_name == "Updated"
+    end
+
+    test "can destroy any member", %{user: user, unlinked_member: unlinked_member} do
+      :ok = Ash.destroy(unlinked_member, actor: user)
+
+      # Verify member is deleted
+      assert {:error, _} = Ash.get(Membership.Member, unlinked_member.id, domain: Mv.Membership)
+    end
+  end
+
+  describe "special case: user can always access linked member" do
+    test "own_data user can read linked member even without explicit permission" do
+      user = create_user_with_permission_set("own_data")
+      linked_member = create_linked_member_for_user(user)
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+      {:ok, user} = Ash.load(user, :member, domain: Mv.Accounts)
+
+      # Should succeed (special case policy takes precedence)
+      {:ok, member} =
+        Ash.get(Membership.Member, linked_member.id, actor: user, domain: Mv.Membership)
+
+      assert member.id == linked_member.id
+    end
+
+    test "read_only user can read linked member (via special case)" do
+      user = create_user_with_permission_set("read_only")
+      linked_member = create_linked_member_for_user(user)
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+      {:ok, user} = Ash.load(user, :member, domain: Mv.Accounts)
+
+      # Should succeed (special case policy takes precedence)
+      {:ok, member} =
+        Ash.get(Membership.Member, linked_member.id, actor: user, domain: Mv.Membership)
+
+      assert member.id == linked_member.id
+    end
+
+    test "own_data user can update linked member even without explicit permission" do
+      user = create_user_with_permission_set("own_data")
+      linked_member = create_linked_member_for_user(user)
+
+      # Reload user to get updated member_id
+      {:ok, user} = Ash.get(Accounts.User, user.id, domain: Mv.Accounts, load: [:role])
+      {:ok, user} = Ash.load(user, :member, domain: Mv.Accounts)
+
+      # Should succeed (special case policy takes precedence)
+      {:ok, updated_member} =
+        linked_member
+        |> Ash.Changeset.for_update(:update_member, %{first_name: "Updated"})
+        |> Ash.update(actor: user)
+
+      assert updated_member.first_name == "Updated"
+    end
+  end
+end