用机器电学测试 ViewPager (和 CursorLoader)

有人知道如何使用 Robolecric 测试下面的设置吗？

包含 ViewPager 的片段，用 CursorLoader 加载的数据。

使用下面的代码，CursorLoader 永远不会被推送到视图页导航器的适配器中。 我被 await()的电话缠住了。

事件片段测试.java:

@RunWith(CustomRobolectricTestRunner.class)
public class EventsFragmentTest extends AbstractDbAndUiDriver
{
// which element in the view pager we are testing
private static final int           TEST_INDEX = 0;


protected SherlockFragmentActivity mActivity;
protected EventsFragment_          mFragment;


@Override
@Before
public void setUp() throws Exception
{
// create activity to hold the fragment
this.mActivity = CustomRobolectricTestRunner.getActivity();


// create and start the fragment
this.mFragment = new EventsFragment_();
}


@Test
public void sanityTest()
{
// create an event
final Event event = this.createEvent();


// create mock cursor loader
final Cursor cursor = this.createMockEventCursor(event);
this.mFragment.setCursorLoader(mock(CursorLoader.class));
when(this.mFragment.getCursorLoader().loadInBackground()).thenReturn(cursor);
CustomRobolectricTestRunner.startFragment(this.mActivity, this.mFragment);


await().atMost(5, SECONDS).until(this.isCursorLoaderLoaded(), equalTo(true));


// check for data displayed
final TextView title = this.getTextView(R.id.event_view_title);
final TextView text = this.getTextView(R.id.event_view_text);


// exists and visible is enough for now
this.getImageView(R.id.event_view_image);


assertThat(title.getText().toString(), equalTo(event.getTitle()));
assertThat(text.getText().toString(), is(event.getText()));


// clean up
cursor.close();
}


@Override
protected View getRootView()
{
return ((ViewPager) this.mFragment.getView().findViewById(R.id.events_pager)).getChildAt(TEST_INDEX);
}


private Callable<Boolean> isCursorLoaderLoaded()
{
return new Callable<Boolean>()
{
public Boolean call() throws Exception
{
return EventsFragmentTest.this.mFragment.isCursorLoaderLoaded(); // The condition that must be fulfilled
}
};
}


/**
* Create an event
*
* @return
*/
protected Event createEvent()
{
// create a random event
final Event event = new Event();
event.setImage(null);
event.setLink("/some/link/" + RandomUtils.getRandomString(5)); //$NON-NLS-1$
event.setResourceUri("/rest/uri/" + RandomUtils.getRandomDouble()); //$NON-NLS-1$
event.setText("this is a test object " + RandomUtils.getRandomString(5)); //$NON-NLS-1$
return event;
}


protected Cursor createMockEventCursor(final Event event)
{
// Create a mock cursor.
final Cursor cursor = new CursorWrapper(mock(MockCursor.class));


when(cursor.getCount()).thenReturn(1);
when(cursor.getString(cursor.getColumnIndexOrThrow(EventTable.COLUMN_TEXT))).thenReturn(event.getText());
when(cursor.getString(cursor.getColumnIndexOrThrow(EventTable.COLUMN_TITLE))).thenReturn(event.getTitle());
when(cursor.getString(cursor.getColumnIndexOrThrow(EventTable.COLUMN_IMAGE))).thenReturn(event.getImage());
when(cursor.getString(cursor.getColumnIndexOrThrow(EventTable.COLUMN_LINK))).thenReturn(event.getLink());
when(cursor.getString(cursor.getColumnIndexOrThrow(EventTable.COLUMN_RESOURCE_URI))).thenReturn(
event.getResourceUri());


// return created event
return cursor;
}


}

事件片段.java

@EFragment(resName = "events_fragment")
public class EventsFragment extends SherlockFragment implements LoaderCallbacks<Cursor>
{
@ViewById(R.id.events_pager)
protected ViewPager             mPager;


@ViewById(R.id.events_indicator)
protected CirclePageIndicator   mIndicator;


@Pref
protected ISharedPrefs_         mPreferences;


protected EventsFragmentAdapter pageAdapter;


private CursorLoader            mCursorLoader;


/**
* initialise the cursoradapter and the cursor loader manager.
*/
@AfterViews
void init()
{
final SherlockFragmentActivity activity = this.getSherlockActivity();


this.pageAdapter = new EventsFragmentAdapter(activity.getSupportFragmentManager(), null);
this.mPager.setAdapter(this.pageAdapter);
this.mIndicator.setViewPager(this.mPager);
this.getLoaderManager().initLoader(this.mPager.getId(), null, this);
}


/* (non-Javadoc)
* @see android.support.v4.app.LoaderManager.LoaderCallbacks#onCreateLoader(int, android.os.Bundle)
*/
@Override
public Loader<Cursor> onCreateLoader(final int arg0, final Bundle arg1)
{
if (this.mCursorLoader == null)
{
// set sort to newest first
final String sortOrder = BaseColumns._ID + " DESC"; //$NON-NLS-1$


this.mCursorLoader = new CursorLoader(this.getActivity(), EventContentProvider.CONTENT_URI,
EventTable.getProjection(), AbstractDbTable.getWhereCondition(null),
AbstractDbTable.getWhereArgs(this.mPreferences, null), sortOrder);
}
return this.mCursorLoader;
}


/* (non-Javadoc)
* @see android.support.v4.app.LoaderManager.LoaderCallbacks#onLoadFinished(android.support.v4.content.Loader, java.lang.Object)
*/
@Override
public void onLoadFinished(final Loader<Cursor> arg0, final Cursor cursor)
{
this.pageAdapter.swapCursor(cursor);


}


/* (non-Javadoc)
* @see android.support.v4.app.LoaderManager.LoaderCallbacks#onLoaderReset(android.support.v4.content.Loader)
*/
@Override
public void onLoaderReset(final Loader<Cursor> arg0)
{
this.pageAdapter.swapCursor(null);
}


/**
* Required for testing only.
*
* @param cursorLoader
*/
public void setCursorLoader(final CursorLoader cursorLoader)
{
this.mCursorLoader = cursorLoader;
}


/**
* Required for testing only.
*
* @param cursorLoader
*/
public CursorLoader getCursorLoader()
{
return this.mCursorLoader;
}


public boolean isCursorLoaderLoaded()
{
return (this.pageAdapter.getCursor() != null);
}
}