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      1 /*
      2  * Copyright (C) 2011 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 com.android.contacts.util;
     18 
     19 import com.android.contacts.util.ExpirableCache.CachedValue;
     20 
     21 import android.test.AndroidTestCase;
     22 import android.test.suitebuilder.annotation.SmallTest;
     23 import android.util.LruCache;
     24 
     25 /**
     26  * Unit tests for {@link ExpirableCache}.
     27  */
     28 @SmallTest
     29 public class ExpirableCacheTest extends AndroidTestCase {
     30     /** The object under test. */
     31     private ExpirableCache<String, Integer> mCache;
     32 
     33     @Override
     34     protected void setUp() throws Exception {
     35         super.setUp();
     36         LruCache<String, CachedValue<Integer>> lruCache =
     37             new LruCache<String, ExpirableCache.CachedValue<Integer>>(20);
     38         mCache = ExpirableCache.create(lruCache);
     39     }
     40 
     41     @Override
     42     protected void tearDown() throws Exception {
     43         mCache = null;
     44         super.tearDown();
     45     }
     46 
     47     public void testPut() {
     48         mCache.put("a", 1);
     49         mCache.put("b", 2);
     50         assertEquals(1, mCache.getPossiblyExpired("a").intValue());
     51         assertEquals(2, mCache.getPossiblyExpired("b").intValue());
     52         mCache.put("a", 3);
     53         assertEquals(3, mCache.getPossiblyExpired("a").intValue());
     54     }
     55 
     56     public void testGet_NotExisting() {
     57         assertNull(mCache.getPossiblyExpired("a"));
     58         mCache.put("b", 1);
     59         assertNull(mCache.getPossiblyExpired("a"));
     60     }
     61 
     62     public void testGet_Expired() {
     63         mCache.put("a", 1);
     64         assertEquals(1, mCache.getPossiblyExpired("a").intValue());
     65         mCache.expireAll();
     66         assertEquals(1, mCache.getPossiblyExpired("a").intValue());
     67     }
     68 
     69     public void testGetNotExpired_NotExisting() {
     70         assertNull(mCache.get("a"));
     71         mCache.put("b", 1);
     72         assertNull(mCache.get("a"));
     73     }
     74 
     75     public void testGetNotExpired_Expired() {
     76         mCache.put("a", 1);
     77         assertEquals(1, mCache.get("a").intValue());
     78         mCache.expireAll();
     79         assertNull(mCache.get("a"));
     80     }
     81 
     82     public void testGetCachedValue_NotExisting() {
     83         assertNull(mCache.getCachedValue("a"));
     84         mCache.put("b", 1);
     85         assertNull(mCache.getCachedValue("a"));
     86     }
     87 
     88     public void testGetCachedValue_Expired() {
     89         mCache.put("a", 1);
     90         assertFalse("Should not be expired", mCache.getCachedValue("a").isExpired());
     91         mCache.expireAll();
     92         assertTrue("Should be expired", mCache.getCachedValue("a").isExpired());
     93     }
     94 
     95     public void testGetChangedValue_PutAfterExpired() {
     96         mCache.put("a", 1);
     97         mCache.expireAll();
     98         mCache.put("a", 1);
     99         assertFalse("Should not be expired", mCache.getCachedValue("a").isExpired());
    100     }
    101 
    102     public void testComputingCache() {
    103         // Creates a cache in which all unknown values default to zero.
    104         mCache = ExpirableCache.create(
    105                 new LruCache<String, ExpirableCache.CachedValue<Integer>>(10) {
    106                     @Override
    107                     protected CachedValue<Integer> create(String key) {
    108                         return mCache.newCachedValue(0);
    109                     }
    110                 });
    111 
    112         // The first time we request a new value, we add it to the cache.
    113         CachedValue<Integer> cachedValue = mCache.getCachedValue("a");
    114         assertNotNull("Should have been created implicitly", cachedValue);
    115         assertEquals(0, cachedValue.getValue().intValue());
    116         assertFalse("Should not be expired", cachedValue.isExpired());
    117 
    118         // If we expire all the values, the implicitly created value will also be marked as expired.
    119         mCache.expireAll();
    120         CachedValue<Integer> expiredCachedValue = mCache.getCachedValue("a");
    121         assertNotNull("Should have been created implicitly", expiredCachedValue);
    122         assertEquals(0, expiredCachedValue.getValue().intValue());
    123         assertTrue("Should be expired", expiredCachedValue.isExpired());
    124     }
    125 }
    126