@Test
public void initializeCache_withValidContext_shouldCreateNewCachesIdempotently()
throws Exception {
assertThat(CacheService.getDiskLruCache()).isNull();
CacheService.initialize(context);
DiskLruCache diskLruCache = CacheService.getDiskLruCache();
assertThat(diskLruCache).isNotNull();
CacheService.initialize(context);
assertThat(diskLruCache).isEqualTo(CacheService.getDiskLruCache());
}
@Test
public void diskLruCacheAsyncPut_whenEmpty_shouldReturnNull() throws Exception {
CacheService.initialize(context);
CacheService.putToDiskCacheAsync(key1, data1.getBytes());
Thread.sleep(500);
assertThat(CacheService.getFromDiskCache(key1)).isEqualTo(data1.getBytes());
}
@Test
public void diskLruCachePut_withEmptyStringKey_shouldPutCorrectly() throws Exception {
// this works because an empty string sha1 hashes to a valid key
CacheService.initialize(context);
CacheService.putToDiskCache("", data1.getBytes());
assertThat(CacheService.getFromDiskCache("")).isEqualTo(data1.getBytes());
}
@Test
public void diskLruCachePut_withNullKey_shouldNotPut() throws Exception {
// null value produces empty string key which is invalid for disk lru cache
CacheService.initialize(context);
assertCachesAreEmpty();
CacheService.putToDiskCache(null, data1.getBytes());
assertCachesAreEmpty();
}
@Test
public void diskLruCacheAsyncGet_whenEmpty_shouldReturnNull() throws Exception {
CacheService.initialize(context);
CacheService.getFromDiskCacheAsync(key1, diskCacheGetListener);
semaphore.acquire();
assertThat(getKey).isEqualTo(key1);
assertThat(getBytes).isNull();
}
@Test
public void diskLruCacheAsyncGet_whenPopulated_shouldReturnValue() throws Exception {
CacheService.initialize(context);
assertCachesAreEmpty();
CacheService.putToDiskCache(key1, data1.getBytes());
CacheService.getFromDiskCacheAsync(key1, diskCacheGetListener);
semaphore.acquire();
assertThat(getKey).isEqualTo(key1);
assertThat(getBytes).isEqualTo(data1.getBytes());
}
@Test
public void diskLruCacheGet_whenEmpty_shouldReturnNull() throws Exception {
CacheService.initialize(context);
assertCachesAreEmpty();
assertThat(CacheService.getFromDiskCache(key1)).isNull();
}
@Test
public void diskLruCacheGet_whenPopulated_shouldReturnValue() throws Exception {
CacheService.initialize(context);
CacheService.putToDiskCache(key1, data1.getBytes());
assertThat(CacheService.getFromDiskCache(key1)).isEqualTo(data1.getBytes());
}
@Test
public void createValidDiskLruCacheKey_withNullValue_shouldReturnEmptyString() throws Exception {
CacheService.initialize(context);
assertThat(CacheService.createValidDiskCacheKey(null)).isEqualTo("");
}