android-espresso测试框架简单使用

参考文章 http://blog.csdn.net/qiang_xi/article/details/52933593 buid.gradle testCompile ‘junit:junit:4.12’ androidTestCompile ‘com.android.support.test.espresso:espresso-core:2.2.+’ androidTestCompile ‘com.android.support.test:runner:0.4.+’ androidTestCompile ‘com.android.support.test:rules:0.2’