require "vnd.stalwart.testsuite"; test_set "message" text: From: Stephan Bosch To: nico@frop.example.org Subject: Test message Comment: Test! . ; test "Empty key" { if header :is "from" "" { test_fail "erroneously matched empty key against non-empty string"; } if not header :is "comment" "" { test_fail "failed to match empty string"; } }