tests UPDATE check for expect for yangre

Author: michalvasko

tests/yangre/CMakeLists.txt

@@ -1,6 +1,9 @@
 find_program(PATH_TCLSH NAMES tclsh)
+find_program(PATH_EXPECT NAMES expect)
 if(NOT PATH_TCLSH)
-    message(WARNING "'tclsh' not found! The yangre test will not be available.")
+    message(WARNING "tclsh not found, yanglint(1) interactive tests will not be available.")
+elseif(NOT PATH_EXPECT)
+    message(WARNING "expect not found, yanglint(1) interactive tests will not be available.")
 else()
     add_test(NAME "yangre" COMMAND "tclsh" "${CMAKE_CURRENT_SOURCE_DIR}/all.tcl")
     set_property(TEST "yangre" APPEND PROPERTY ENVIRONMENT "TESTS_DIR=${CMAKE_CURRENT_SOURCE_DIR}")