validation NEW when validation

Integrated only into XML parser for now.
diff --git a/tests/src/CMakeLists.txt b/tests/src/CMakeLists.txt
index 0aa4fa5..00bf835 100644
--- a/tests/src/CMakeLists.txt
+++ b/tests/src/CMakeLists.txt
@@ -13,7 +13,8 @@
     src_printer_yin
     src_tree_data
     src_parser_xml
-    src_printer_xml)
+    src_printer_xml
+    src_validation)
 set(local_tests_wraps
     " "
     "-Wl,--wrap=realloc"
@@ -29,6 +30,7 @@
     " "
     " "
     " "
+    " "
     " ")
 set(tests ${tests} ${local_tests} PARENT_SCOPE)
 set(tests_wraps ${tests_wraps} ${local_tests_wraps} PARENT_SCOPE)