This is a testharness.js-based test.
[FAIL] state selector has influence when state is applied
Failed to execute 'add' on 'CustomStateSet': The specified value 'green' must start with '--'.
[FAIL] state selector only applies on given ident
Failed to execute 'add' on 'CustomStateSet': The specified value 'foo' must start with '--'.
Harness: the test ran to completion.