Add unit-tests automation to Drone CI

tests/unit/run-tests.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+TESTS=$(make -f -  2>/dev/null <<EOF
+include Makefile
+all:
+	@echo \$(TESTS)
+EOF
+)
+
+echo "-----------------------------------------------------------------";
+echo "Starting tests";
+echo "Tests found: ${TESTS}";
+echo "-----------------------------------------------------------------";
+for i in $TESTS
+do
+    echo "Testing $i" ;
+    logfilename="log_run-tests_$i.html";
+    ./$i | tee >(ansi2html > $logfilename) ;
+    exitstatus=${PIPESTATUS[0]} ;
+    if [ "0" -eq $exitstatus ] ; then
+	rm $logfilename ;
+    else
+	echo "*** ./$i exit status is $exitstatus" ;
+	echo "*** $logfilename was saved" ;
+    fi ;
+    echo "----------------" ;
+done