tests/pkg_libcoap: migrate to testrunner

tests/pkg_libcoap/Makefile

@@ -14,3 +14,6 @@ USEMODULE += gnrc_sock_udp
 USEPKG += libcoap
 
 include $(RIOTBASE)/Makefile.include
+
+test:
+	tests/01-run.py

tests/pkg_libcoap/main.c

@@ -18,6 +18,6 @@
 
 int main(void)
 {
-    puts("Libcoap compiled!");
+    puts("SUCCESS: Libcoap compiled!");
     return 0;
 }

tests/pkg_libcoap/tests/01-run.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+import math
+
+sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
+import testrunner
+
+
+def testfunc(child):
+    child.expect_exact('SUCCESS: Libcoap compiled!')
+
+if __name__ == "__main__":
+    sys.exit(testrunner.run(testfunc))