I have a requirement where I need to start recording in Iphone device On button tap of Apple watch and stop recording when the same button is tapped again in Apple watch app. But since Apple watch is not available yet how can I test this functionality? Please help
It is not possible to pair a real iPhone with the Watch Simulator. All testing has to be done using the Watch Simulator alongside the iPhone simulator.
Normally you would be able to test your desired functionality with the simulators, but if by "recording" you are referring to video recording, that would not be possible as the iPhone simulator does not have access to a camera.
This is an excellent use case for the need to pair the Watch Simulator with a real iPhone. Apple have been actively encouraging developers to submit their enhancement requests to http://bugreport.apple.com
Clearly, you will want to also test with the actual hardware as soon as it ships.