Add Role resource policies (defense-in-depth)

- PermissionSets: Role read :all for own_data, read_only, normal_user; admin keeps full CRUD
- Role resource: authorizers and policies with HasPermission
- Tests: role_policies_test.exs (read all, create/update/destroy admin only)
- Fix existing tests to pass actor or authorize?: false for Role operations

test/mv/authorization/role_policies_test.exs

@@ -0,0 +1,226 @@
+defmodule Mv.Authorization.RolePoliciesTest do
+  @moduledoc """
+  Tests for Role resource authorization policies.
+
+  Rule: All permission sets (own_data, read_only, normal_user, admin) can **read** roles.
+  Only **admin** can create, update, or destroy roles.
+  """
+  use Mv.DataCase, async: false
+
+  alias Mv.Authorization
+  alias Mv.Authorization.Role
+
+  describe "read access - all permission sets can read roles" do
+    setup do
+      # Create a role to read (via system_actor; once policies exist, system_actor is admin)
+      role = Mv.Fixtures.role_fixture("read_only")
+      %{role: role}
+    end
+
+    @tag :permission_set_own_data
+    test "own_data can list roles", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("own_data")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, roles} = Authorization.list_roles(actor: user)
+
+      assert is_list(roles)
+      assert roles != []
+    end
+
+    @tag :permission_set_own_data
+    test "own_data can get role by id", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("own_data")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, loaded} = Ash.get(Role, role.id, actor: user, domain: Mv.Authorization)
+
+      assert loaded.id == role.id
+    end
+
+    @tag :permission_set_read_only
+    test "read_only can list roles", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("read_only")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, roles} = Authorization.list_roles(actor: user)
+
+      assert is_list(roles)
+      assert roles != []
+    end
+
+    @tag :permission_set_read_only
+    test "read_only can get role by id", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("read_only")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, loaded} = Ash.get(Role, role.id, actor: user, domain: Mv.Authorization)
+
+      assert loaded.id == role.id
+    end
+
+    @tag :permission_set_normal_user
+    test "normal_user can list roles", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("normal_user")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, roles} = Authorization.list_roles(actor: user)
+
+      assert is_list(roles)
+      assert roles != []
+    end
+
+    @tag :permission_set_normal_user
+    test "normal_user can get role by id", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("normal_user")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      {:ok, loaded} = Ash.get(Role, role.id, actor: user, domain: Mv.Authorization)
+
+      assert loaded.id == role.id
+    end
+
+    @tag :permission_set_admin
+    test "admin can list roles", %{role: _role} do
+      admin = Mv.Fixtures.user_with_role_fixture("admin")
+      admin = Mv.Authorization.Actor.ensure_loaded(admin)
+
+      {:ok, roles} = Authorization.list_roles(actor: admin)
+
+      assert is_list(roles)
+      assert roles != []
+    end
+
+    @tag :permission_set_admin
+    test "admin can get role by id", %{role: role} do
+      admin = Mv.Fixtures.user_with_role_fixture("admin")
+      admin = Mv.Authorization.Actor.ensure_loaded(admin)
+
+      {:ok, loaded} = Ash.get(Role, role.id, actor: admin, domain: Mv.Authorization)
+
+      assert loaded.id == role.id
+    end
+  end
+
+  describe "create/update/destroy - only admin allowed" do
+    setup do
+      # Non-system role for destroy test (role_fixture creates non-system roles)
+      role = Mv.Fixtures.role_fixture("normal_user")
+      %{role: role}
+    end
+
+    test "admin can create_role", %{role: _role} do
+      admin = Mv.Fixtures.user_with_role_fixture("admin")
+      admin = Mv.Authorization.Actor.ensure_loaded(admin)
+
+      attrs = %{
+        name: "New Role #{System.unique_integer([:positive])}",
+        description: "Test",
+        permission_set_name: "read_only"
+      }
+
+      assert {:ok, _created} = Authorization.create_role(attrs, actor: admin)
+    end
+
+    test "admin can update_role", %{role: role} do
+      admin = Mv.Fixtures.user_with_role_fixture("admin")
+      admin = Mv.Authorization.Actor.ensure_loaded(admin)
+
+      assert {:ok, updated} =
+               Authorization.update_role(role, %{description: "Updated by admin"}, actor: admin)
+
+      assert updated.description == "Updated by admin"
+    end
+
+    test "admin can destroy non-system role", %{role: role} do
+      admin = Mv.Fixtures.user_with_role_fixture("admin")
+      admin = Mv.Authorization.Actor.ensure_loaded(admin)
+
+      assert :ok = Authorization.destroy_role(role, actor: admin)
+    end
+
+    test "own_data cannot create_role (forbidden)", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("own_data")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      attrs = %{
+        name: "New Role #{System.unique_integer([:positive])}",
+        description: "Test",
+        permission_set_name: "read_only"
+      }
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.create_role(attrs, actor: user)
+    end
+
+    test "own_data cannot update_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("own_data")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} =
+               Authorization.update_role(role, %{description: "Updated"}, actor: user)
+    end
+
+    test "own_data cannot destroy_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("own_data")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.destroy_role(role, actor: user)
+    end
+
+    test "read_only cannot create_role (forbidden)", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("read_only")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      attrs = %{
+        name: "New Role #{System.unique_integer([:positive])}",
+        description: "Test",
+        permission_set_name: "read_only"
+      }
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.create_role(attrs, actor: user)
+    end
+
+    test "read_only cannot update_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("read_only")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} =
+               Authorization.update_role(role, %{description: "Updated"}, actor: user)
+    end
+
+    test "read_only cannot destroy_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("read_only")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.destroy_role(role, actor: user)
+    end
+
+    test "normal_user cannot create_role (forbidden)", %{role: _role} do
+      user = Mv.Fixtures.user_with_role_fixture("normal_user")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      attrs = %{
+        name: "New Role #{System.unique_integer([:positive])}",
+        description: "Test",
+        permission_set_name: "normal_user"
+      }
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.create_role(attrs, actor: user)
+    end
+
+    test "normal_user cannot update_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("normal_user")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} =
+               Authorization.update_role(role, %{description: "Updated"}, actor: user)
+    end
+
+    test "normal_user cannot destroy_role (forbidden)", %{role: role} do
+      user = Mv.Fixtures.user_with_role_fixture("normal_user")
+      user = Mv.Authorization.Actor.ensure_loaded(user)
+
+      assert {:error, %Ash.Error.Forbidden{}} = Authorization.destroy_role(role, actor: user)
+    end
+  end
+end