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      1 /*
      2  * Copyright (C) 2015 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 package android.databinding.testapp;
     17 
     18 import android.databinding.BaseObservable;
     19 import android.databinding.testapp.databinding.BasicBindingBinding;
     20 
     21 import android.databinding.Observable;
     22 import android.databinding.Observable.OnPropertyChangedCallback;
     23 
     24 import java.util.ArrayList;
     25 
     26 public class BaseObservableTest extends BaseDataBinderTest<BasicBindingBinding> {
     27     private BaseObservable mObservable;
     28     private ArrayList<Integer> mNotifications = new ArrayList<>();
     29     private OnPropertyChangedCallback mCallback = new OnPropertyChangedCallback() {
     30         @Override
     31         public void onPropertyChanged(Observable observable, int i) {
     32             assertEquals(mObservable, observable);
     33             mNotifications.add(i);
     34         }
     35     };
     36 
     37     public BaseObservableTest() {
     38         super(BasicBindingBinding.class);
     39     }
     40 
     41     @Override
     42     protected void setUp() throws Exception {
     43         mNotifications.clear();
     44         mObservable = new BaseObservable();
     45         initBinder(null);
     46     }
     47 
     48     public void testAddCallback() {
     49         mObservable.notifyChange();
     50         assertTrue(mNotifications.isEmpty());
     51         mObservable.addOnPropertyChangedCallback(mCallback);
     52         mObservable.notifyChange();
     53         assertFalse(mNotifications.isEmpty());
     54     }
     55 
     56     public void testRemoveCallback() {
     57         // test there is no exception when the Callback isn't there
     58         mObservable.removeOnPropertyChangedCallback(mCallback);
     59 
     60         mObservable.addOnPropertyChangedCallback(mCallback);
     61         mObservable.notifyChange();
     62         mNotifications.clear();
     63         mObservable.removeOnPropertyChangedCallback(mCallback);
     64         mObservable.notifyChange();
     65         assertTrue(mNotifications.isEmpty());
     66 
     67         // test there is no exception when the Callback isn't there
     68         mObservable.removeOnPropertyChangedCallback(mCallback);
     69     }
     70 
     71     public void testNotifyChange() {
     72         mObservable.addOnPropertyChangedCallback(mCallback);
     73         mObservable.notifyChange();
     74         assertEquals(1, mNotifications.size());
     75         assertEquals(0, (int) mNotifications.get(0));
     76     }
     77 
     78     public void testNotifyPropertyChanged() {
     79         final int expectedId = 100;
     80         mObservable.addOnPropertyChangedCallback(mCallback);
     81         mObservable.notifyPropertyChanged(expectedId);
     82         assertEquals(1, mNotifications.size());
     83         assertEquals(expectedId, (int) mNotifications.get(0));
     84     }
     85 }
     86