[Tarantool-patches] [PATCH v2 luajit 02/26] test: prepare lauxilarily libs for LuaJIT-tests

[Sergey Kaplun via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

This patch adds rules to build C and C++ libs from the
<LuaJIT-tests/src/> directory. Also, it allows these libraries to be
loaded via `require()` (since `luaL_openlib()` evolves global state).
The name of "ctest" library is changed to "libctest" to allow it to be
loaded via both `ffi.load()` and `require()`. "cpptest" library is
renamed to "libcpptest" for consistency.

Part of tarantool/tarantool#9398
---
 test/LuaJIT-tests/CMakeLists.txt              | 29 +++++++++++++++++--
 test/LuaJIT-tests/src/CMakeLists.txt          | 17 +++++++++++
 .../src/{cpptest.cpp => libcpptest.cpp}       |  4 +--
 test/LuaJIT-tests/src/{ctest.c => libctest.c} |  4 +--
 test/LuaJIT-tests/test.lua                    |  7 +++--
 5 files changed, 52 insertions(+), 9 deletions(-)
 create mode 100644 test/LuaJIT-tests/src/CMakeLists.txt
 rename test/LuaJIT-tests/src/{cpptest.cpp => libcpptest.cpp} (96%)
 rename test/LuaJIT-tests/src/{ctest.c => libctest.c} (99%)

diff --git a/test/LuaJIT-tests/CMakeLists.txt b/test/LuaJIT-tests/CMakeLists.txt
index 9cd76ee9..c52bcc71 100644
--- a/test/LuaJIT-tests/CMakeLists.txt
+++ b/test/LuaJIT-tests/CMakeLists.txt
@@ -1,12 +1,35 @@
 # See the rationale in the root CMakeLists.txt
 cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
-add_custom_target(LuaJIT-tests DEPENDS ${LUAJIT_TEST_BINARY})
+add_subdirectory(src)
+
+add_custom_target(LuaJIT-tests
+  DEPENDS ${LUAJIT_TEST_BINARY} LuaJIT-tests-prepare
+)
+
+make_lua_path(LUA_CPATH
+  PATHS
+  ${CMAKE_CURRENT_BINARY_DIR}/src/?${CMAKE_SHARED_LIBRARY_SUFFIX}
+)
+
+set(LUAJIT_TESTS_ENV
+  "LUA_CPATH=\"${LUA_CPATH}\""
+)
+
+set(LD_LIBRARY_PATH "${CMAKE_CURRENT_BINARY_DIR}/src/:")
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  list(APPEND LUAJIT_TESTS_ENV DYLD_LIBRARY_PATH="${LD_LIBRARY_PATH}")
+else()
+  list(APPEND LUAJIT_TESTS_ENV LD_LIBRARY_PATH="${LD_LIBRARY_PATH}")
+endif()
 
 add_custom_command(TARGET LuaJIT-tests
   COMMENT "Running LuaJIT-tests"
   COMMAND
-    ${LUAJIT_TEST_COMMAND} ${CMAKE_CURRENT_SOURCE_DIR}/test.lua
-    +slow +ffi +bit +jit
+    env
+      ${LUAJIT_TESTS_ENV}
+      ${LUAJIT_TEST_COMMAND} ${CMAKE_CURRENT_SOURCE_DIR}/test.lua
+      +slow +ffi +bit +jit
   WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 )
diff --git a/test/LuaJIT-tests/src/CMakeLists.txt b/test/LuaJIT-tests/src/CMakeLists.txt
new file mode 100644
index 00000000..fb14d6d9
--- /dev/null
+++ b/test/LuaJIT-tests/src/CMakeLists.txt
@@ -0,0 +1,17 @@
+# See the rationale in the root CMakeLists.txt.
+cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
+
+# Build additional C/C++ libraries for tests.
+macro(BuildTestLib lib sources)
+  AddTestLib(${lib} ${sources})
+  list(APPEND TESTLIBS ${lib})
+endmacro()
+
+# Use `lib` prefix for loading via FFI and `require()`.
+BuildTestLib(libctest libctest.c)
+enable_language(CXX)
+BuildTestLib(libcpptest libcpptest.cpp)
+
+add_custom_target(LuaJIT-tests-prepare DEPENDS ${TESTLIBS})
+
+# vim: expandtab tabstop=2 shiftwidth=2
diff --git a/test/LuaJIT-tests/src/cpptest.cpp b/test/LuaJIT-tests/src/libcpptest.cpp
similarity index 96%
rename from test/LuaJIT-tests/src/cpptest.cpp
rename to test/LuaJIT-tests/src/libcpptest.cpp
index a5893ed6..cdfb5e32 100644
--- a/test/LuaJIT-tests/src/cpptest.cpp
+++ b/test/LuaJIT-tests/src/libcpptest.cpp
@@ -121,9 +121,9 @@ static luaL_Reg ct_funcs[] = {
 };
 
 extern "C" {
-LUA_API int luaopen_cpptest(lua_State *L)
+LUA_API int luaopen_libcpptest(lua_State *L)
 {
-  luaL_register(L, "cpptest", ct_funcs);
+  luaL_register(L, "libcpptest", ct_funcs);
   return 1;
 }
 }
diff --git a/test/LuaJIT-tests/src/ctest.c b/test/LuaJIT-tests/src/libctest.c
similarity index 99%
rename from test/LuaJIT-tests/src/ctest.c
rename to test/LuaJIT-tests/src/libctest.c
index e99f2306..aa95b57b 100644
--- a/test/LuaJIT-tests/src/ctest.c
+++ b/test/LuaJIT-tests/src/libctest.c
@@ -332,8 +332,8 @@ static luaL_Reg ct_funcs[] = {
   {NULL, NULL}
 };
 
-LUA_API int luaopen_ctest(lua_State *L)
+LUA_API int luaopen_libctest(lua_State *L)
 {
-  luaL_register(L, "ctest", ct_funcs);
+  luaL_register(L, "libctest", ct_funcs);
   return 1;
 }
diff --git a/test/LuaJIT-tests/test.lua b/test/LuaJIT-tests/test.lua
index b064eff7..f2450222 100644
--- a/test/LuaJIT-tests/test.lua
+++ b/test/LuaJIT-tests/test.lua
@@ -297,8 +297,11 @@ local function append_tree_to_plan(test_tree, opts, plan, prefix)
 end
 
 local function seal_globals()
-  local sealed_mt = {__newindex = function()
-    error("Tests should not mutate global state", 3)
+  local sealed_mt = {__newindex = function(_, k)
+    -- Allow to load C/C++ libraries for the test.
+    if k ~= "libctest" and k ~= "libcpptest" then
+      error("Tests should not mutate global state", 3)
+    end
   end}
   local function seal(t)
     if getmetatable(t) then return end
-- 
2.43.0