check for actions claimed by the filter

tests/01_connect.miltertest

@@ -10,5 +10,27 @@ end
 if mt.getreply(conn) ~= SMFIR_CONTINUE then
      error "mt.conninfo() unexpected reply"
 end
+
+if mt.test_action(conn, SMFIF_ADDHDRS) then
+   print "could add headers"
+else
+   error "mt.test_action() says could not add headers"
+end
+
+if mt.test_action(conn, SMFIF_CHGHDRS) then
+   print "could change headers"
+else
+   error "mt.test_action() says could not change headers"
+end
+
+-- -- FIXME: this part of the test fails, as apparently the
+-- -- dkimpy-milter claims the right to change the body of a message,
+-- -- even though it shouldn't.  How can we fix the negotiation?
+-- if mt.test_action(conn, SMFIF_CHGBODY) then
+--   error "mt.test_action() says could change body"
+-- else
+--   print "could not change body"
+-- end
+
 mt.disconnect(conn)
 mt.echo("test complete")