yangre TEST testing yangre via tcl scripts
diff --git a/tests/yangre/ly.tcl b/tests/yangre/ly.tcl
new file mode 100644
index 0000000..3bb62b5
--- /dev/null
+++ b/tests/yangre/ly.tcl
@@ -0,0 +1,17 @@
+# @brief The main source of functions and variables for testing yangre.
+
+package require tcltest
+namespace import ::tcltest::test ::tcltest::cleanupTests
+
+if { ![info exists ::env(TESTS_DIR)] } {
+    # the script is not run via 'ctest' so paths must be set
+    set ::env(TESTS_DIR) "./"
+    set TUT_PATH "../../build"
+} else {
+    # cmake (ctest) already sets ::env variables
+    set TUT_PATH $::env(YANGRE)
+}
+set TUT_NAME "yangre"
+source "$::env(TESTS_DIR)/../tool_ni.tcl"
+
+# The script continues by defining variables and functions specific to the yangre tool.