ChunkerEvaluationMonitor listener = new ChunkEvaluationErrorListener(stream);
ChunkerEvaluator evaluator = new ChunkerEvaluator(dummyChunker, listener);
evaluator.evaluate(expectedSample);
FMeasure fm = evaluator.getFMeasure();
assertEquals(0.8d, fm.getPrecisionScore(), DELTA);
assertEquals(0.875d, fm.getRecallScore(), DELTA);
assertNotSame(stream.toString().length(), 0);
}