yanglint TEST moved to the tests directory
diff --git a/tests/tool_ni.tcl b/tests/tool_ni.tcl
new file mode 100644
index 0000000..7282d35
--- /dev/null
+++ b/tests/tool_ni.tcl
@@ -0,0 +1,141 @@
+# @brief Common functions and variables for Tool Under Test (TUT).
+#
+# The script requires variables:
+# TUT_PATH - Assumed absolute path to the directory in which the TUT is located.
+# TUT_NAME - TUT name (without path).
+#
+# The script sets the variables:
+# TUT - The path (including the name) of the executable TUT.
+# error_prompt - Delimiter on error.
+# error_head - Header on error.
+
+# Complete the path for Tool Under Test (TUT). For example, on Windows, TUT can be located in the Debug or Release
+# subdirectory. Note that Release build takes precedence over Debug.
+set conftypes {{} Release Debug}
+foreach i $conftypes {
+ if { [file executable "$TUT_PATH/$i/$TUT_NAME"] || [file executable "$TUT_PATH/$i/$TUT_NAME.exe"] } {
+ set TUT "$TUT_PATH/$i/$TUT_NAME"
+ break
+ }
+}
+if {![info exists TUT]} {
+ error "$TUT_NAME executable not found"
+}
+
+# prompt of error message
+set error_prompt ">>>"
+# the beginning of error message
+set error_head "$error_prompt Check-failed"
+
+# Run commands from command line
+tcltest::loadTestedCommands
+
+# namespace of internal functions
+namespace eval ly::private {
+ namespace export *
+}
+
+# Run the process with arguments.
+# Parameter cmd is a string with arguments.
+# Parameter wrn is a flag. Set to 1 if stderr should be ignored.
+# Returns a pair where the first is the return code and the second is the output.
+proc ly::private::ly_exec {cmd {wrn ""}} {
+ global TUT
+ try {
+ set results [exec -- $TUT {*}$cmd]
+ set status 0
+ } trap CHILDSTATUS {results options} {
+ # return code is not 0
+ set status [lindex [dict get $options -errorcode] 2]
+ } trap NONE results {
+ if { $wrn == 1 } {
+ set status 0
+ } else {
+ error "return code is 0 but something was written to stderr:\n$results\n"
+ }
+ } trap CHILDKILLED {results options} {
+ set status [lindex [dict get $options -errorcode] 2]
+ error "process was killed: $status"
+ }
+ list $status $results
+}
+
+# Internal function.
+# Check the output with pattern.
+# Parameter pattern is a regex or an exact string to match.
+# Parameter msg is the output to check.
+# Parameter 'opt' is optional. If contains '-ex', then the 'pattern' parameter is
+# used as a simple string for exact matching of the output.
+proc ly::private::output_check {pattern msg {opt ""}} {
+ if { $opt eq "" } {
+ expr {![regexp -- $pattern $msg]}
+ } elseif { $opt eq "-ex" } {
+ expr {![string equal "$pattern" $msg]}
+ } else {
+ global error_head
+ error "$error_head unrecognized value of parameter 'opt'"
+ }
+}
+
+# Execute yanglint with arguments and expect success.
+# Parameter cmd is a string of arguments.
+# Parameter pattern is a regex or an exact string to match.
+# Parameter 'opt' is optional. If contains '-ex', then the 'pattern' parameter is
+# used as a simple string for exact matching of the output.
+proc ly_cmd {cmd {pattern ""} {opt ""}} {
+ namespace import ly::private::*
+ lassign [ly_exec $cmd] rc msg
+ if { $rc != 0 } {
+ error "unexpected return code $rc:\n$msg\n"
+ }
+ if { $pattern ne "" && [output_check $pattern $msg $opt] } {
+ error "unexpected output:\n$msg\n"
+ }
+ return
+}
+
+# Execute yanglint with arguments and expect error.
+# Parameter cmd is a string of arguments.
+# Parameter pattern is a regex.
+proc ly_cmd_err {cmd pattern} {
+ namespace import ly::private::*
+ lassign [ly_exec $cmd] rc msg
+ if { $rc == 0 } {
+ error "unexpected return code $rc"
+ }
+ if { [output_check $pattern $msg] } {
+ error "unexpected output:\n$msg\n"
+ }
+ return
+}
+
+# Execute yanglint with arguments, expect warning in stderr but success.
+# Parameter cmd is a string of arguments.
+# Parameter pattern is a regex.
+proc ly_cmd_wrn {cmd pattern} {
+ namespace import ly::private::*
+ lassign [ly_exec $cmd 1] rc msg
+ if { $rc != 0 } {
+ error "unexpected return code $rc:\n$msg\n"
+ }
+ if { [output_check $pattern $msg] } {
+ error "unexpected output:\n$msg\n"
+ }
+ return
+}
+
+# Check if yanglint supports the specified option.
+# Parameter opt is a option to be found.
+# Return true if option is found otherwise false.
+proc ly_opt_exists {opt} {
+ namespace import ly::private::*
+ lassign [ly_exec "--help"] rc msg
+ if { $rc != 0 } {
+ error "unexpected return code $rc:\n$msg\n"
+ }
+ if { [output_check $opt $msg] } {
+ return false
+ } else {
+ return true
+ }
+}