@Test
public void handlesBadlyFormedCacheFile() throws IOException {
TestFile testFile = tmpDir.getDir().file("cache.bin");
testFile.assertIsFile();
testFile.write("some junk");
BTreePersistentIndexedCache<String, Integer> cache = new BTreePersistentIndexedCache<String, Integer>(backingCache, serializer);
assertNull(cache.get("key_1"));