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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.widget.cts;
     18 
     19 import static org.junit.Assert.assertEquals;
     20 import static org.junit.Assert.assertNull;
     21 import static org.junit.Assert.assertSame;
     22 import static org.junit.Assert.assertTrue;
     23 import static org.junit.Assert.fail;
     24 
     25 import android.content.Context;
     26 import android.support.test.InstrumentationRegistry;
     27 import android.support.test.filters.SmallTest;
     28 import android.support.test.runner.AndroidJUnit4;
     29 import android.util.AttributeSet;
     30 import android.util.Xml;
     31 import android.view.View;
     32 import android.view.ViewGroup;
     33 import android.widget.ListView;
     34 import android.widget.ViewSwitcher;
     35 import android.widget.ViewSwitcher.ViewFactory;
     36 
     37 import org.junit.Before;
     38 import org.junit.Test;
     39 import org.junit.runner.RunWith;
     40 import org.xmlpull.v1.XmlPullParser;
     41 
     42 /**
     43  * Test {@link ViewSwitcher}.
     44  */
     45 @SmallTest
     46 @RunWith(AndroidJUnit4.class)
     47 public class ViewSwitcherTest {
     48     private Context mContext;
     49 
     50     @Before
     51     public void setup() {
     52         mContext = InstrumentationRegistry.getTargetContext();
     53     }
     54 
     55     @Test
     56     public void testConstructor() {
     57         new ViewSwitcher(mContext);
     58 
     59         new ViewSwitcher(mContext, null);
     60 
     61         XmlPullParser parser = mContext.getResources().getXml(R.layout.viewswitcher_layout);
     62         AttributeSet attrs = Xml.asAttributeSet(parser);
     63         new ViewSwitcher(mContext, attrs);
     64     }
     65 
     66     @Test
     67     public void testSetFactory() {
     68         final ViewSwitcher viewSwitcher = new ViewSwitcher(mContext);
     69 
     70         MockViewFactory factory = new MockViewFactory();
     71         viewSwitcher.setFactory(factory);
     72         assertTrue(factory.hasMakeViewCalled());
     73     }
     74 
     75     @Test
     76     public void testReset() {
     77         final ViewSwitcher viewSwitcher = new ViewSwitcher(mContext);
     78 
     79         ListView lv1 = new ListView(mContext);
     80         ListView lv2 = new ListView(mContext);
     81         assertEquals(View.VISIBLE, lv1.getVisibility());
     82         assertEquals(View.VISIBLE, lv2.getVisibility());
     83         viewSwitcher.addView(lv1, 0);
     84         viewSwitcher.addView(lv2, 1);
     85 
     86         viewSwitcher.reset();
     87         assertEquals(View.GONE, lv1.getVisibility());
     88         assertEquals(View.GONE, lv2.getVisibility());
     89     }
     90 
     91     @Test
     92     public void testGetNextView() {
     93         final ViewSwitcher viewSwitcher = new ViewSwitcher(mContext);
     94 
     95         ListView lv1 = new ListView(mContext);
     96         ListView lv2 = new ListView(mContext);
     97         viewSwitcher.addView(lv1, 0, new ViewGroup.LayoutParams(20, 25));
     98         assertSame(lv1, viewSwitcher.getChildAt(0));
     99         assertNull(viewSwitcher.getNextView());
    100 
    101         viewSwitcher.addView(lv2, 1, new ViewGroup.LayoutParams(20, 25));
    102         assertSame(lv2, viewSwitcher.getChildAt(1));
    103         assertSame(lv2, viewSwitcher.getNextView());
    104 
    105         viewSwitcher.setDisplayedChild(1);
    106         assertSame(lv1, viewSwitcher.getNextView());
    107 
    108         try {
    109             ListView lv3 = new ListView(mContext);
    110             viewSwitcher.addView(lv3, 2, null);
    111             fail("Should throw IllegalStateException here.");
    112         } catch (IllegalStateException e) {
    113         }
    114     }
    115 
    116     private class MockViewFactory implements ViewFactory {
    117         private boolean mMakeViewCalled = false;
    118 
    119         public View makeView() {
    120             mMakeViewCalled = true;
    121             return new ListView(mContext);
    122         }
    123 
    124         public boolean hasMakeViewCalled() {
    125             return mMakeViewCalled;
    126         }
    127     }
    128 }
    129