### Question:
Impression implements Serializable { public void setH2(H2 h2) { this.h2 = h2; } Impression();  Impression(H0 h0, H1 h1, H2 h2, H3 h3);  Impression(Double[] dayCounts);  Impression(double[] dayCounts);  Impression(Map map); Long getTotal(); double getValueForHIndex(int h_index); long countImpressions(double price, TargetingChannel.PriceModel priceModel); H1 getH1(); void setH1(H1 h1); H0 getH0(); void setH0(H0 h0); H2 getH2(); void setH2(H2 h2); H3 getH3(); void setH3(H3 h3); Integer getH_index(); void setH_index(Integer h_index); void adjustPositive(); List<Double> getHs(); static Impression add(Impression i1, Impression i2); static Impression subtract(Impression i1, Impression i2); static Impression multiply(Impression i1, double r); long getCountByPriceCategory(int priceCategory); long getIndividualHistogramCountByPriceCategory(int priceCategory); void adjustValue(int priceCategory, long t); @Override String toString(); static final int TOTAL_NUM_OF_PRICE_CATEGORIES; }### Answer:
@Test public void setH2() { H2 h2 = new H2(); h2.setH("22"); h2.setT((long) 2); Impression imp = new Impression(new H0(), new H1(), h2, new H3()); assertEquals(h2, imp.getH2()); H2 h22 = new H2(); h22.setH("222"); h22.setT((long) 22); imp.setH2(h22); assertEquals(h22, imp.getH2()); }