Squashed 'libs/loguru/' content from commit 644f60d

git-subtree-dir: libs/loguru
git-subtree-split: 644f60dca77de3b0f718a03d370c8ebdf5f97968

test/fail_test_wrapper.cmake

@@ -0,0 +1,24 @@
+#!/usr/bin/env cmake -P
+cmake_minimum_required(VERSION 2.8.7)
+
+get_filename_component(CurrentFile ${CMAKE_CURRENT_LIST_FILE} NAME)
+
+# The script is invoked as cmake -P <script name> <loguru_test> <arg(s)>
+# the following loop extracts the arguments after the one matching the script name
+foreach(i RANGE 0 ${CMAKE_ARGC})
+    if(CollectArgs)
+        list(APPEND TestArgs ${CMAKE_ARGV${i}})
+    elseif(CMAKE_ARGV${i} MATCHES "${CurrentFile}$")
+        set(CollectArgs true)
+    endif()
+endforeach()
+
+# TestArgs contains <loguru_test> <arg(s)>
+execute_process(COMMAND ${TestArgs}
+                RESULT_VARIABLE CmdResult)
+
+# To invert the failure logic
+if(NOT CmdResult)
+# the wrapper must fail if the child process returned success
+    message(FATAL_ERROR "${TestArgs} passed.")
+endif()