@Test
public void test1() {
Int2IntFrequencyDistribution fd = new Int2IntFrequencyDistributionOpen();
assertEquals(0, fd.get(1));
fd.increment(1);
fd.increment(2);
fd.increment(3);
fd.increment(2);
fd.increment(3);
fd.increment(3);
assertEquals(3, fd.getNumberOfEvents());
assertEquals(6, fd.getSumOfCounts());
assertEquals(1, fd.get(1));
assertEquals(2, fd.get(2));
assertEquals(3, fd.get(3));
assertEquals((float) 1 / 6, fd.getFrequency(1), 10e-6);
assertEquals((float) 2 / 6, fd.getFrequency(2), 10e-6);
assertEquals((float) 3 / 6, fd.getFrequency(3), 10e-6);
assertEquals(Math.log((float) 1 / 6), fd.getLogFrequency(1), 10e-6);
assertEquals(Math.log((float) 2 / 6), fd.getLogFrequency(2), 10e-6);
assertEquals(Math.log((float) 3 / 6), fd.getLogFrequency(3), 10e-6);
fd.decrement(3);
assertEquals(3, fd.getNumberOfEvents());
assertEquals(5, fd.getSumOfCounts());
assertEquals(1, fd.get(1));
assertEquals(2, fd.get(2));
assertEquals(2, fd.get(3));
assertEquals((float) 1 / 5, fd.getFrequency(1), 10e-6);
assertEquals((float) 2 / 5, fd.getFrequency(2), 10e-6);
assertEquals((float) 2 / 5, fd.getFrequency(3), 10e-6);
assertEquals(Math.log((float) 1 / 5), fd.getLogFrequency(1), 10e-6);
assertEquals(Math.log((float) 2 / 5), fd.getLogFrequency(2), 10e-6);
assertEquals(Math.log((float) 2 / 5), fd.getLogFrequency(3), 10e-6);
fd.decrement(1);
assertEquals(2, fd.getNumberOfEvents());
assertEquals(4, fd.getSumOfCounts());
assertEquals(0, fd.get(1));
assertEquals(2, fd.get(2));
assertEquals(2, fd.get(3));
assertEquals((float) 2 / 4, fd.getFrequency(2), 10e-6);
assertEquals((float) 2 / 4, fd.getFrequency(3), 10e-6);
assertEquals(Math.log((float) 2 / 4), fd.getLogFrequency(2), 10e-6);
assertEquals(Math.log((float) 2 / 4), fd.getLogFrequency(3), 10e-6);
}
