fix sum rcpp error on Unix systems (cpp11test)

cpp11test/.Rbuildignore

@@ -0,0 +1,3 @@
+^\.here$
+^bench$
+^LICENSE\.md$

cpp11test/DESCRIPTION

@@ -12,12 +12,14 @@ Authors@R:
 Description: Provides a test suite and benchmarking code for the 'cpp11' package.
 License: MIT + file LICENSE
 Encoding: UTF-8
-LinkingTo: Rcpp, cpp11, testthat
+LinkingTo: cpp11, Rcpp, testthat
+Imports: cpp11, Rcpp
 Suggests:
     covr,
-    testthat,
+    testthat (>= 3.0.0),
     pkgload,
     xml2
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.1.1
+RoxygenNote: 7.3.2
+Config/testthat/edition: 3

cpp11test/LICENSE

@@ -0,0 +1,2 @@
+YEAR: 2025
+COPYRIGHT HOLDER: cpp11test authors

cpp11test/LICENSE.md

@@ -0,0 +1,21 @@
+# MIT License
+
+Copyright (c) 2025 cpp11test authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

cpp11test/NAMESPACE

@@ -3,4 +3,5 @@
 export(run_tests)
 exportPattern("_$")
 importFrom(Rcpp,sourceCpp)
+importFrom(cpp11,cpp_source)
 useDynLib(cpp11test, .registration = TRUE)

cpp11test/R/cpp11test-package.R

@@ -1,6 +1,8 @@
 #' @keywords internal
 #' @exportPattern "_$"
+#' @importFrom cpp11 cpp_source
 #' @importFrom Rcpp sourceCpp
+NULL
 "_PACKAGE"
 
 # The following block is used by usethis to automatically manage

cpp11test/R/test.R

@@ -22,6 +22,5 @@ run_tests <- function(reporter = testthat::default_reporter()) {
   on.exit(setwd(old))
   setwd(system.file("tests", package = "cpp11test"))
 
-  library(testthat)
-  test_check("cpp11test", reporter = reporter)
+  testthat::test_check("cpp11test", reporter = reporter)
 }

cpp11test/tests/testthat.R

@@ -1,4 +1,12 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
 library(testthat)
-library(cpp11)
+library(cpp11test)
 
 test_check("cpp11test")