VR Headset Simulator

Is it possible to code a program for HoloLens or Ocullus Rift or HTC Vice with AR Core? And is there a simulator for a VR headset like HoloLens or Ocullus Rift or HTC Vice to experiment the code with if you don't have a VR Headset?

 

If you have a movile device with AR capabilities, you can use this plugin to transfer camera position and rotation to Unity Editor. There is no support for controllers though, only camera pose.
https://forum.unity.com/threads/ar-...d-debug-your-ar-project-in-the-editor.898433/