Add LazyActivityScenarioRule that defers the launch of the Activity until needed

[bohsen]

Overview

This change makes it possible to defer the launch of the Activity under test until the first call to LazyActivityScenarioRule.getScenario(), so that different setups/options can be initialized before the Activity is launched.

Fixes #446.

Proposed Changes

• Add LazyActivityScenarioRule (similar to ActivityScenarioRule) that instead of launching the Activity under test right away, defers this until the first call to LazyActivityScenarioRule.getScenario(). This makes it possible to initialize different setups ie. populate an in-memory database, prepare test data, deactivate wifi etc.
• Add the possibility to disable() the new Rule in tests that doesn't need an Activity to run, ie. tests for:
  • internal utility-methods
  • internal test data generators etc.

[YuraLaguta]

+1

[murilodag]

+1

[victormpineda]

+1!!! Please merge this

[eduardbosch]

+1 👌

[rabacadabra]

+1

[m-kubis]

👍

[Ekt0s]

+1 👍 @googlebot