final DocsFreqBlockIndexInput in = this.getIndexInput();
final DocsFreqBlockReader reader = in.getBlockReader();
reader.setNodeBlockIndex(in.index());
reader.setPosBlockIndex(in.index());
for (int i = 0; i < 5; i++) {
if (reader.isExhausted()) {
reader.nextBlock();
}
assertEquals(i, reader.nextDocument());