Pretty far along. They have an in process application with the FAA for running tests on a "DragonFly" vehicle which is basically a Dragon 2 capsule designed for

Pretty far along. They have an in process application with the FAA for running tests on a "DragonFly" vehicle which is basically a Dragon 2 capsule designed for testing the landing system (which, according to the permit) they plan to do a lot of tests on. Also, they will test the in flight abort system in two separate unmanned tests this year. One on the launch pad and another with a full scale launch with the escape system activating at Max-Q (maximum dynamic pressure on the rocket, the most extreme test possible for the system). Many of the components share engineering heritage with the unmanned cargo Dragon such as the pressure hull, heat shield, RCS thrusters, and so on. Nobody outside SpaceX would know how far along they are in terms of every single component and with integration but every indication is that they are quite far along indeed and most of what they need to do at this point is validate their design through testing and eventually operational flights.