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      1 /*
      2  * Copyright (C) 2007 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.view;
     18 
     19 import android.view.BigCache;
     20 import com.android.frameworks.coretests.R;
     21 
     22 import android.test.ActivityInstrumentationTestCase;
     23 import android.test.suitebuilder.annotation.MediumTest;
     24 import android.view.View;
     25 import android.view.ViewConfiguration;
     26 import android.graphics.Bitmap;
     27 
     28 /**
     29  * Builds the drawing cache of two Views, one smaller than the maximum cache size,
     30  * one larger than the maximum cache size. The latter should always have a null
     31  * drawing cache.
     32  */
     33 public class BigCacheTest extends ActivityInstrumentationTestCase<BigCache> {
     34     private View mTiny;
     35     private View mLarge;
     36 
     37     public BigCacheTest() {
     38         super("com.android.frameworks.coretests", BigCache.class);
     39     }
     40 
     41     @Override
     42     public void setUp() throws Exception {
     43         super.setUp();
     44 
     45         final BigCache activity = getActivity();
     46         mTiny = activity.findViewById(R.id.a);
     47         mLarge = activity.findViewById(R.id.b);
     48     }
     49 
     50     @MediumTest
     51     public void testSetUpConditions() throws Exception {
     52         assertNotNull(mTiny);
     53         assertNotNull(mLarge);
     54     }
     55 
     56     @MediumTest
     57     public void testDrawingCacheBelowMaximumSize() throws Exception {
     58         final int max = ViewConfiguration.get(getActivity()).getScaledMaximumDrawingCacheSize();
     59         assertTrue(mTiny.getWidth() * mTiny.getHeight() * 2 < max);
     60         assertNotNull(createCacheForView(mTiny));
     61     }
     62 
     63     // TODO: needs to be adjusted to pass on non-HVGA displays
     64     // @MediumTest
     65     public void testDrawingCacheAboveMaximumSize() throws Exception {
     66         final int max = ViewConfiguration.get(getActivity()).getScaledMaximumDrawingCacheSize();
     67         assertTrue(mLarge.getWidth() * mLarge.getHeight() * 2 > max);
     68         assertNull(createCacheForView(mLarge));
     69     }
     70 
     71     private Bitmap createCacheForView(final View view) {
     72         final Bitmap[] cache = new Bitmap[1];
     73         getActivity().runOnUiThread(new Runnable() {
     74             public void run() {
     75                 view.setDrawingCacheEnabled(true);
     76                 view.invalidate();
     77                 view.buildDrawingCache();
     78                 cache[0] = view.getDrawingCache();
     79             }
     80         });
     81         getInstrumentation().waitForIdleSync();
     82         return cache[0];
     83     }
     84 }
     85