@Test
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
Example local unit test, which will execute on the development machine (host).

@see <a href="http://d.android.com/tools/testing">Testing documentation</a>
DataBindingDemo/app/src/test/java/com/yl/databindingdemo/ExampleUnitTest.java