Respect path order of DL_PATHS in catch_discover_tests function

Author: cy20lin

extras/CatchAddTests.cmake

@@ -37,6 +37,7 @@ function(catch_discover_tests_impl)
   set(output_suffix ${_TEST_OUTPUT_SUFFIX})
   set(dl_paths ${_TEST_DL_PATHS})
   set(dl_framework_paths ${_TEST_DL_FRAMEWORK_PATHS})
+  set(environment_modifications "")
   set(script)
   set(suite)
   set(tests)
@@ -57,7 +58,9 @@ function(catch_discover_tests_impl)
   endif()
 
   if(dl_paths)
-    cmake_path(CONVERT "${dl_paths}" TO_NATIVE_PATH_LIST paths)
+    cmake_path(CONVERT "$ENV{${dl_paths_variable_name}}" TO_NATIVE_PATH_LIST env_dl_paths)
+    list(PREPEND env_dl_paths "${dl_paths}")
+    cmake_path(CONVERT "${env_dl_paths}" TO_NATIVE_PATH_LIST paths)
     set(ENV{${dl_paths_variable_name}} "${paths}")
   endif()
 
@@ -123,7 +126,7 @@ function(catch_discover_tests_impl)
   if(dl_paths)
     foreach(path ${dl_paths})
       cmake_path(NATIVE_PATH path native_path)
-      list(APPEND environment_modifications "${dl_paths_variable_name}=path_list_prepend:${native_path}")
+      list(PREPEND environment_modifications "${dl_paths_variable_name}=path_list_prepend:${native_path}")
     endforeach()
   endif()