1 files changed, 87 insertions, 0 deletions
diff --git a/Tests/RunCMake/FindLua/FindLuaTest.cmake b/Tests/RunCMake/FindLua/FindLuaTest.cmake
new file mode 100644
index 0000000..610d544
--- /dev/null
+++ b/Tests/RunCMake/FindLua/FindLuaTest.cmake
@@ -0,0 +1,87 @@
+unset(VERSION)
+
+# Ignore all default paths for this test to avoid finding system Lua
+set(CMAKE_INCLUDE_PATH )
+set(CMAKE_PREFIX_PATH )
+set(CMAKE_FRAMEWORK_PATH )
+
+set(ENV{CMAKE_INCLUDE_PATH} )
+set(ENV{CMAKE_PREFIX_PATH} )
+set(ENV{CMAKE_FRAMEWORK_PATH} )
+
+set(ENV{PATH} )
+set(ENV{INCLUDE} )
+
+set(CMAKE_SYSTEM_INCLUDE_PATH )
+set(CMAKE_SYSTEM_PREFIX_PATH )
+set(CMAKE_SYSTEM_FRAMEWORK_PATH )
+
+function(require_found path version)
+    find_package(Lua ${VERSION} QUIET)
+    if(NOT "${LUA_INCLUDE_DIR}" STREQUAL "${path}")
+        message(FATAL_ERROR "LUA_INCLUDE_PATH != path: '${LUA_INCLUDE_DIR}' != '${path}'")
+    endif()
+    if(NOT LUA_VERSION_STRING MATCHES "^${version}\.[0-9]$")
+        message(FATAL_ERROR "Wrong versionfound in '${LUA_INCLUDE_DIR}': ${LUA_VERSION_STRING} != ${version}")
+    endif()
+endfunction()
+
+# Use functions for scoping and better error messages
+function(require_find path version)
+    unset(LUA_INCLUDE_DIR CACHE)
+    require_found(${lua_path} ${version})
+endfunction()
+
+function(test_prefix_path path lua_path version)
+    set(CMAKE_PREFIX_PATH ${path})
+    require_find(lua_path ${version})
+endfunction()
+
+function(test_include_path path lua_path version)
+    set(CMAKE_INCLUDE_PATH ${path})
+    require_find(lua_path  ${version})
+endfunction()
+
+function(test_env_path path lua_path version)
+    set(ENV{LUA_DIR} ${path})
+    require_find(lua_path  ${version})
+    unset(ENV{LUA_DIR})
+endfunction()
+
+function(test_path prefix_path lua_path version)
+    # Shortcut: Make paths relative to current list dir
+    set(prefix_path ${CMAKE_CURRENT_LIST_DIR}/${prefix_path})
+    set(lua_path ${CMAKE_CURRENT_LIST_DIR}/${lua_path})
+
+    test_prefix_path(${prefix_path} ${lua_path} ${version})
+    test_include_path(${prefix_path}/include ${lua_path}  ${version})
+    test_env_path(${prefix_path} ${lua_path}  ${version})
+endfunction()
+
+# Simple test
+test_path(prefix1 prefix1/include 5.3)
+# Find highest version
+test_path(prefix2 prefix2/include/lua5.3 5.3)
+foreach(ver 5.3 5.2 5.1)
+    # At least X or X.0 -> Highest
+    set(VERSION "${ver}")
+    test_path(prefix2 prefix2/include/lua5.3 5.3)
+    set(VERSION "${ver}.0")
+    test_path(prefix2 prefix2/include/lua5.3 5.3)
+    # Exactly X/X.0
+    set(VERSION "${ver}" EXACT)
+    test_path(prefix2 prefix2/include/lua${ver} ${ver})
+    set(VERSION "${ver}.0" EXACT)
+    test_path(prefix2 prefix2/include/lua${ver} ${ver})
+endforeach()
+
+# Find unknown version
+set(VERSION "5.9")
+test_path(prefix2 prefix2/include/lua5.9 5.9)
+set(VERSION "5.9" EXACT)
+test_path(prefix2 prefix2/include/lua5.9 5.9)
+
+# Set LUA_INCLUDE_DIR (non-cache) to unsuitable version
+set(LUA_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/prefix2/include/lua5.2)
+set(VERSION "5.1" EXACT)
+test_path(prefix2 prefix2/include/lua5.1 5.1)