From 681ee920307a6c1ddafa1d6d4b0329050a7ac689 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Wed, 14 Feb 2024 14:20:42 -0500
Subject: Tests/CXXModules: support testing rebuild conditions

---
 Tests/RunCMake/CXXModules/RunCMakeTest.cmake | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Tests/RunCMake/CXXModules/RunCMakeTest.cmake b/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
index 0ac60e0..8e5abdd 100644
--- a/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
@@ -147,6 +147,12 @@ function (run_cxx_module_test directory)
   if (NOT RunCMake_CXXModules_NO_TEST)
     run_cmake_command("examples/${test_name}-test" "${CMAKE_CTEST_COMMAND}" -C Debug --output-on-failure)
   endif ()
+  if (RunCMake_CXXModules_REBUILD)
+    execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1.125) # handle 1s resolution
+    include("${RunCMake_TEST_SOURCE_DIR}/pre-rebuild.cmake")
+    execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1.125) # handle 1s resolution
+    run_cmake_command("examples/${test_name}-rebuild" "${CMAKE_COMMAND}" --build . --config Debug)
+  endif ()
 endfunction ()
 
 function (run_cxx_module_test_target directory target)
@@ -155,6 +161,13 @@ function (run_cxx_module_test_target directory target)
   run_cxx_module_test("${directory}" ${ARGN})
 endfunction ()
 
+function (run_cxx_module_test_rebuild directory)
+  set(RunCMake_CXXModules_INSTALL 0)
+  set(RunCMake_CXXModules_NO_TEST 1)
+  set(RunCMake_CXXModules_REBUILD 1)
+  run_cxx_module_test("${directory}" ${ARGN})
+endfunction ()
+
 string(REPLACE "," ";" CMake_TEST_MODULE_COMPILATION "${CMake_TEST_MODULE_COMPILATION}")
 
 if (RunCMake_GENERATOR MATCHES "Ninja")
-- 
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