1 package com.xtremelabs.robolectric.shadows; 2 3 import android.database.DataSetObserver; 4 import android.support.v4.view.PagerAdapter; 5 import android.view.View; 6 import com.xtremelabs.robolectric.WithTestDefaultsRunner; 7 import org.junit.Test; 8 import org.junit.runner.RunWith; 9 10 import static com.xtremelabs.robolectric.Robolectric.shadowOf; 11 import static junit.framework.Assert.assertTrue; 12 13 @RunWith(WithTestDefaultsRunner.class) 14 public class PagerAdapterTest { 15 @Test 16 public void shouldNotifyDataSetChanged() throws Exception { 17 PagerAdapter pagerAdapter = new NullPagerAdapter(); 18 TestDataSetObserver datasetObserver= new TestDataSetObserver(); 19 shadowOf(pagerAdapter).registerDataSetObserver(datasetObserver); 20 pagerAdapter.notifyDataSetChanged(); 21 22 assertTrue(datasetObserver.onChangedWasCalled); 23 } 24 25 private static class NullPagerAdapter extends PagerAdapter { 26 @Override 27 public int getCount() { 28 return 0; 29 } 30 31 @Override 32 public boolean isViewFromObject(View view, Object object) { 33 return false; 34 } 35 } 36 37 private class TestDataSetObserver extends DataSetObserver { 38 boolean onChangedWasCalled; 39 @Override 40 public void onChanged() { 41 onChangedWasCalled = true; 42 } 43 } 44 } 45
