Home | History | Annotate | Download | only in cts 
      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.database.cts;
     18 
     19 
     20 import android.database.ContentObservable;
     21 import android.database.ContentObserver;
     22 import android.net.Uri;
     23 import android.test.InstrumentationTestCase;
     24 
     25 public class ContentObservableTest extends InstrumentationTestCase {
     26     private static final Uri CONTENT_URI = Uri.parse("content://uri");
     27 
     28     ContentObservable mContentObservable;
     29     MyContentObserver mObserver;
     30 
     31     @Override
     32     protected void setUp() throws Exception {
     33         super.setUp();
     34 
     35         mContentObservable = new ContentObservable();
     36         mObserver = new MyContentObserver();
     37     }
     38 
     39     public void testNotifyChange() {
     40         mContentObservable.registerObserver(mObserver);
     41         mObserver.resetStatus();
     42         assertFalse(mObserver.hasChanged());
     43         mContentObservable.notifyChange(false);
     44         assertTrue(mObserver.hasChanged());
     45 
     46         try {
     47             mContentObservable.registerObserver(mObserver);
     48             fail("Re-registering observer did not cause exception.");
     49         } catch (IllegalStateException expected) {
     50             // expected
     51         }
     52 
     53         try {
     54             mContentObservable.registerObserver(null);
     55             fail("Registering null observer did not cause exception.");
     56         } catch (IllegalArgumentException expected) {
     57             // expected
     58         }
     59 
     60         MyContentObserver second = new MyContentObserver();
     61         mContentObservable.registerObserver(second);
     62 
     63         mContentObservable.unregisterObserver(mObserver);
     64         mObserver.resetStatus();
     65         assertFalse(mObserver.hasChanged());
     66         mContentObservable.notifyChange(false);
     67         assertFalse(mObserver.hasChanged());
     68         assertTrue(second.hasChanged());
     69     }
     70 
     71     public void testDispatchChange() {
     72         mContentObservable.registerObserver(mObserver);
     73         mObserver.resetStatus();
     74         assertFalse(mObserver.hasChanged());
     75         mContentObservable.dispatchChange(false);
     76         assertTrue(mObserver.hasChanged());
     77         assertNull(mObserver.getUri());
     78 
     79         mObserver.resetStatus();
     80         assertFalse(mObserver.hasChanged());
     81         mContentObservable.dispatchChange(true);
     82         assertFalse(mObserver.hasChanged());
     83         mObserver.setDeliverSelfNotifications(true);
     84         mContentObservable.dispatchChange(true);
     85         assertTrue(mObserver.hasChanged());
     86         assertNull(mObserver.getUri());
     87 
     88         mContentObservable.unregisterObserver(mObserver);
     89         mObserver.resetStatus();
     90         assertFalse(mObserver.hasChanged());
     91         mContentObservable.dispatchChange(false);
     92         assertFalse(mObserver.hasChanged());
     93     }
     94 
     95     public void testDispatchChangeWithUri() {
     96         mContentObservable.registerObserver(mObserver);
     97         mObserver.resetStatus();
     98         assertFalse(mObserver.hasChanged());
     99         mContentObservable.dispatchChange(false, CONTENT_URI);
    100         assertTrue(mObserver.hasChanged());
    101         assertEquals(CONTENT_URI, mObserver.getUri());
    102 
    103         mObserver.resetStatus();
    104         assertFalse(mObserver.hasChanged());
    105         mContentObservable.dispatchChange(true, CONTENT_URI);
    106         assertFalse(mObserver.hasChanged());
    107         mObserver.setDeliverSelfNotifications(true);
    108         mContentObservable.dispatchChange(true, CONTENT_URI);
    109         assertTrue(mObserver.hasChanged());
    110         assertEquals(CONTENT_URI, mObserver.getUri());
    111 
    112         mContentObservable.unregisterObserver(mObserver);
    113         mObserver.resetStatus();
    114         assertFalse(mObserver.hasChanged());
    115         mContentObservable.dispatchChange(false, CONTENT_URI);
    116         assertFalse(mObserver.hasChanged());
    117     }
    118 
    119     private static class MyContentObserver extends ContentObserver {
    120         private boolean mHasChanged = false;
    121         private boolean mDeliverSelfNotifications = false;
    122         private Uri mUri;
    123 
    124         public MyContentObserver() {
    125             super(null);
    126         }
    127 
    128         @Override
    129         public void onChange(boolean selfChange, Uri uri) {
    130             super.onChange(selfChange, uri);
    131             mHasChanged = true;
    132             mUri = uri;
    133         }
    134 
    135         public boolean deliverSelfNotifications() {
    136             return mDeliverSelfNotifications ;
    137         }
    138 
    139         protected boolean hasChanged() {
    140             return mHasChanged;
    141         }
    142 
    143         protected void resetStatus() {
    144             mHasChanged = false;
    145             mUri = null;
    146         }
    147 
    148         protected void setDeliverSelfNotifications(boolean b) {
    149             mDeliverSelfNotifications = b;
    150         }
    151 
    152         protected Uri getUri() {
    153             return mUri;
    154         }
    155     }
    156 }
    157