### Question:
PrepareStoreCopyFiles implements AutoCloseable { LongSet getNonAtomicIndexIds() { return LongSets.immutable.empty(); } PrepareStoreCopyFiles( NeoStoreDataSource neoStoreDataSource, FileSystemAbstraction fileSystemAbstraction ); @Override void close();  }### Answer:
@Test public void shouldHandleEmptyDescriptors() { LongSet indexIds = prepareStoreCopyFiles.getNonAtomicIndexIds(); assertEquals( 0, indexIds.size() ); }
@Test public void shouldReturnEmptySetOfIdsAndIgnoreIndexListing() { LongSet expectedIndexIds = LongSets.immutable.of( 42 ); when( indexListingMock.getIndexIds() ).thenReturn( expectedIndexIds ); LongSet actualIndexIndexIds = prepareStoreCopyFiles.getNonAtomicIndexIds(); assertTrue( actualIndexIndexIds.isEmpty() ); }