### Question:
NumberFlotSeriesAggregator implements FlotSeriesAggregator { @Override public boolean handles(UiyValueType uiyValueType) { Preconditions.checkNotNull(uiyValueType); return UiyValueType.NUMBER == uiyValueType; }  @Override FlotSeries aggregateFlotSeries(FlotSeries flotSeries, int flotSeriesIndex); @Override boolean handles(UiyValueType uiyValueType); @Autowired void setAggregatedSeriesXValueGenerator(AggregatedSeriesXValueGenerator aggregatedSeriesXValueGenerator);  }### Answer:
@Test(expected = NullPointerException.class) public void handles_NULL() { seriesAggregator.handles(null); }
@Test public void handles_FALSE() { assertFalse(seriesAggregator.handles(UiyValueType.NUMBER_PER_1000)); }
@Test public void handles_TRUE() { assertTrue(seriesAggregator.handles(UiyValueType.NUMBER)); }