Ability to change date/time of emulator

[agramian]

It would be useful to provide a way to change the emulator's date and time for certain tests that vary the UI or logic based on the current device time.

[Kisty]

This would be helpful. Especially when testing alarms in AlarmManager.

One option is to use ShadowAlarmManager#getScheduledAlarms() in Robolectric, to check for scheduled alarms.

This answer might help in adding it to Test Butler.

In the meantime, you could add a custom layer of indirection or use joda-time