Hello RAM,

Unfortunately neither TestFramework or BDD support Reactive Web Apps yet.

The way I see it you have a few options:

1) Wait for the support for Reactive Web Apps;

2) Build your own framework; 

3) Use some E2E automation tool. Since client actions run on the browser, you can create a screen with a few buttons that execute your test code, which then outputs the test result (e.g. output to the console).