Robolectric 介绍
Robolectric 是一款Android单元测试框架，示例代码：
@RunWith(RobolectricTestRunner.class)
public class MyActivityTest {
@Test
public void clickingButton_shouldChangeResultsViewText() throws Exception {
Activity activity = Robolectric.buildActivity(MyActivity.class).create().get();
Button pressMeButton = (Button) activity.findViewById(R.id.press_me_button);
TextView results = (TextView) activity.findViewById(R.id.results_text_view);
pressMeButton.performClick();
String resultsText = results.getText().toString();
assertthat(resultsText, equalTo("Testing Android Rocks!"));
}
}