Vaadin and Groovy Test 3

CalculatorSpec.groovy
In Vaadin, an Application represents the sum of all the components organized in Windows, Layouts and having a theme applied. The central class representing an application is the com.vaadin.Application class.
His responsibilities include the following:

• Managing windows
• Callbacks during the lifecycle of the application
• Setting themes

It is the main servlet of your application, where all the different screen will be call. The method init(), will start the application.

On our groovy class, we need first  launch the future application, lets call it the VaadinCalculator and add the two spock methods setup() and cleanup().