I have created a layout with a ListView that updates values in it depending on which of the 2 given buttons are pressed. Pressing the button labelled Odds clears all values and adds odd numbers up until 20. Pressing evens does the same except for even numbers. This works fine when emulated or tried on a real device. Below is the activity code.
public class ListViewActivity extends Activity {
private ListView mainListView;
private ArrayAdapter<String> listAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.robolectric_test_main);
mainListView = (ListView) findViewById(R.id.mainListView);
ArrayList<String> numbersList = new ArrayList<String>();
for (int i = 1; i < 21; i++) {
numbersList.add(String.valueOf(i));
}
listAdapter = new ArrayAdapter<String>(this, R.layout.robolectric_listview_row, numbersList);
mainListView.setAdapter(listAdapter);
}
public void onOddsClicked(View view) {
listAdapter.clear();
for (int i = 1; i < 21; i += 2) {
listAdapter.add(String.valueOf(i));
}
}
public void onEvensClicked(View view) {
listAdapter.clear();
for (int i = 2; i < 21; i += 2) {
listAdapter.add(String.valueOf(i));
}
}
}
However when trying to test it with Robolectric the ListView is never updated even though the adapter has value modifications. Here is my test code.
@RunWith(RobolectricTestRunner.class)
public class ListViewActivityTest {
private ListViewActivity listViewActivity;
private Button oddsButton;
private Button evensButton;
private ListView numbersList;
@Before
public void setUp() throws Exception {
listViewActivity = Robolectric.buildActivity(ListViewActivity.class).create().start().resume().visible().get();
assignFields();
}
private void assignFields() {
oddsButton = (Button) listViewActivity.findViewById(R.id.oddsButton);
evensButton = (Button) listViewActivity.findViewById(R.id.evensButton);
numbersList = (ListView) listViewActivity.findViewById(R.id.mainListView);
}
@Test
public void odds() throws Exception {
// check all numbers are odd
Robolectric.clickOn(oddsButton);
Robolectric.runUiThreadTasksIncludingDelayedTasks();
for (int i = 0; i < numbersList.getChildCount(); i++) {
TextView number = (TextView) numbersList.getChildAt(i);
String numberString = number.getText().toString();
int parsedInt = Integer.parseInt(numberString);
assertTrue((parsedInt % 2) == 1);
}
}
@Test
public void evens() throws Exception {
// check all numbers are even
Robolectric.clickOn(evensButton);
Robolectric.runUiThreadTasksIncludingDelayedTasks();
for (int i = 0; i < numbersList.getChildCount(); i++) {
TextView number = (TextView) numbersList.getChildAt(i);
String numberString = number.getText().toString();
int parsedInt = Integer.parseInt(numberString);
assertTrue((parsedInt % 2) == 0);
}
}
}
Can you please let me know what I need to do in order to trigger the update on the ListView through Robolectric.