Java library test

Local test

/test/

Labeled as ‘tests’.

If the test does not depend on Android SDK.

Does not require emulator / device.

http://stackoverflow.com/questions/33782401/failed-to-resolve-error23-17-junitjunit4-12-in-android-studio-1-4

Issue junit not found

Top level gradle.

allprojects {

<-- required!!!

repositories {

Jcenter().

}.

}.