src/test/java/com/xtremelabs/robolectric/shadows/ArrayAdapterTest.java

// Copyright 2010 Google Inc. All Rights Reserved.

package com.xtremelabs.robolectric.shadows;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;

import android.database.DataSetObserver;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.xtremelabs.robolectric.R;
import com.xtremelabs.robolectric.Robolectric;
import com.xtremelabs.robolectric.WithTestDefaultsRunner;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

@RunWith(WithTestDefaultsRunner.class)
public class ArrayAdapterTest {
    private ArrayAdapter<Integer> arrayAdapter;

    @Before public void setUp() throws Exception {
        List<Integer> list = new ArrayList<Integer>();
        list.add(1);
        list.add(2);
        list.add(3);

        arrayAdapter = new ArrayAdapter<Integer>(Robolectric.application, 0, list);
    }

    @Test
    public void verifyContext() {
        assertEquals(Robolectric.application, arrayAdapter.getContext());
    }

    @Test
    public void verifyListContent() {
        assertEquals(3, arrayAdapter.getCount());
        assertEquals(new Integer(1), arrayAdapter.getItem(0));
        assertEquals(new Integer(2), arrayAdapter.getItem(1));
        assertEquals(new Integer(3), arrayAdapter.getItem(2));
    }

    @Test
    public void usesTextViewResourceIdToSetTextWithinListItemView() throws Exception {
        ListView parent = new ListView(Robolectric.application);
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(Robolectric.application, R.layout.main, R.id.title, new String[] { "first value" });
        View listItemView = arrayAdapter.getView(0, null, parent);
        TextView titleTextView = (TextView) listItemView.findViewById(R.id.title);
        assertEquals("first value", titleTextView.getText().toString());
    }

    @Test
    public void hasTheCorrectConstructorResourceIDs() {
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(Robolectric.application, R.id.title, new String[] { "first value" });

        //this assertion may look a little backwards since R.id.title is labeled
        //textViewResourceId in the constructor parameter list, but the output is correct.
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter).getResourceId()==R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter).getTextViewResourceId()!=R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter).getTextViewResourceId()==0);

        ArrayAdapter<String> arrayAdapter2 = new ArrayAdapter<String>(Robolectric.application, R.id.title);

        //this assertion may look a little backwards since R.id.title is labeled
        //textViewResourceId in the constructor parameter list, but the output is correct.
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter2).getResourceId()==R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter2).getTextViewResourceId()!=R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter2).getTextViewResourceId()==0);

        ArrayAdapter<String> arrayAdapter3 = new ArrayAdapter<String>(Robolectric.application, R.id.title, Arrays.asList(new String[] { "first value" }));

        //this assertion may look a little backwards since R.id.title is labeled
        //textViewResourceId in the constructor parameter list, but the output is correct.
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter3).getResourceId()==R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter3).getTextViewResourceId()!=R.id.title);
        Assert.assertTrue(Robolectric.shadowOf(arrayAdapter3).getTextViewResourceId()==0);
    }

    @Test
    public void shouldClear() throws Exception {
        arrayAdapter.clear();
        assertEquals(0, arrayAdapter.getCount());
    }

    @Test
    public void test_remove() throws Exception {
        Integer firstItem = arrayAdapter.getItem(0);
        assertEquals(3, arrayAdapter.getCount());
        assertEquals(new Integer(1), firstItem);

        arrayAdapter.remove(firstItem);

        assertEquals(2, arrayAdapter.getCount());
        assertEquals(new Integer(2), arrayAdapter.getItem(0));
        assertEquals(new Integer(3), arrayAdapter.getItem(1));
    }

    @Test
    public void testRemoveNotifiesDataSetObservers() {
        DataSetObserver observer = mock(DataSetObserver.class);
        arrayAdapter.registerDataSetObserver(observer);
        Integer firstItem = arrayAdapter.getItem(0);

        arrayAdapter.remove(firstItem);

        verify(observer).onChanged();
    }

    @Test
    public void testClearNotifiesDataSetObservers() {
        DataSetObserver observer = mock(DataSetObserver.class);
        arrayAdapter.registerDataSetObserver(observer);

        arrayAdapter.clear();

        verify(observer).onChanged();
    }

    @Test
    public void testAddNotifiesDataSetObservers() {
        DataSetObserver observer = mock(DataSetObserver.class);
        arrayAdapter.registerDataSetObserver(observer);

        arrayAdapter.add(27);

        verify(observer).onChanged();
    }

    @Test
    public void testInsertNotifiesDataSetObservers() {
        DataSetObserver observer = mock(DataSetObserver.class);
        arrayAdapter.registerDataSetObserver(observer);

        arrayAdapter.insert(27, 1);

        verify(observer).onChanged();
    }

    @Test
    public void testInsertDoesNotNotifyDataSetObserversWhenDisabled() {
        DataSetObserver observer = mock(DataSetObserver.class);
        arrayAdapter.registerDataSetObserver(observer);

        arrayAdapter.setNotifyOnChange(false);
        arrayAdapter.insert(27, 1);

        verifyNoMoreInteractions(observer);
    }
}