The ISetup interface
Running tests means that we somehow need to bootstrap the environment to make it support EMF and Xtext in addition to the implementation of our DSL. This is done with a suitable implementation of ISetup. We need to configure things differently depending on how we want to run tests; with or without Eclipse and with or without Eclipse UI being present. The way to set up the environment is quite different when Eclipse is present, since many services are shared and already part of the Eclipse environment. When setting up the environment for non-Eclipse use (also referred to as standalone) there are a few things that must be configured, such as creating a Guice injector and registering information required by EMF. The method createInjectorAndDoEMFRegistration in the ISetup interface is there to do exactly this.
Besides the creation of an Injector, this method also performs the initialization of EMF global registries so that after the invocation of that method, the EMF API...
