优化结构

internal/biz/system/user_test.go

@@ -52,3 +52,10 @@ func TestLoginRejectsMissingUserWithoutPanic(t *testing.T) {
 		t.Fatalf("Login() = %#v, %v; want nil, ErrInvalidCredentials", user, err)
 	}
 }
+
+func TestSetUserAuthoritiesRejectsEmptyListAsBadRequest(t *testing.T) {
+	err := NewUserUsecase(&loginUserRepo{}).SetUserAuthorities(context.Background(), 1, nil)
+	if !errors.Is(err, ErrAuthoritiesRequired) || errors.Is(err, ErrInvalidCredentials) {
+		t.Fatalf("SetUserAuthorities() error = %v, want ErrAuthoritiesRequired", err)
+	}
+}