@Test
  public void testEmptyInput() throws Exception {
    Map<StoreKey, StoreKey> storeKeyMap = storeKeyConverter.convert(new ArrayList<>());
    assertEquals("storeKeyMap should not have inputs", storeKeyMap.size(), 0);
  }
Tests conversion of an empty Collection
@throws Exception
ambry-commons/src/test/java/com/github/ambry/store/StoreKeyConverterImplNoOpTest.java