public void testPreconditions() {
        //Try to add a message to add context to your assertions. These messages will be shown if
        //a tests fails and make it easy to understand why a test failed
        assertNotNull("mTestActivity is null", mTestActivity);
        assertNotNull("mTestFragment is null", mTestFragment);
        assertNotNull("mSwipeRefreshLayout is null", mSwipeRefreshLayout);
    }
Test if the test fixture has been set up correctly.
SwipeRefreshMultipleViews/Application/tests/src/com/example/android/swiperefreshmultipleviews/tests/SampleTests.java