This page describes the tools you can use to test the user interface.
To test the UI and frameworks, use these tools:
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    To automate end-to-end user interface testing, use the UI Automator and the open source auto-specific Helpers provided with AOSP. 
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    To automate the testing of end-to-end Bluetooth connectivity, use the open source Google Mobly framework. 
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    To write concise, beautiful, and reliable Android UI tests, use Espresso. 
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    To build, install, and run Android tests locally, use the Atest command line tool. $ atest [optional-arguments] test-to-run 
