Adding some test for PERMIT_DOCKER option

test/tests.bats

@@ -510,3 +510,16 @@
   [ "$status" -eq 1 ]
   [ -z "$output" ]
 }
+
+#
+# PERMIT_DOCKER mynetworks
+#
+@test "checking PERMIT_DOCKER: mynetworks option exist" {
+  run docker exec mail postconf -d | grep '^mynetworks ='
+  [ "$status" -eq 0 ]
+}
+
+@test "checking PERMIT_DOCKER: can get container ip" {
+  run docker exec mail ip addr show eth0 | grep 'inet ' | sed 's/[^0-9\.\/]*//g' | cut -d '/' -f 1 | egrep '[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}'
+  [ "$status" -eq 0 ]
+}