@Test
public void checkEmptyUnion() {
HeapDoublesUnion union = new HeapDoublesUnion(128);
DoublesSketch sk = union.getResult();
assertNotNull(sk);
String s = union.toString();
assertNotNull(s);
}
@Test
public void checkUnionUpdateLogic() {
HeapDoublesSketch qs1 = null;
HeapDoublesSketch qs2 = (HeapDoublesSketch) buildQS(256, 0);
DoublesSketch result = HeapDoublesUnion.updateLogic(qs1, qs2); // null, empty
result = HeapDoublesUnion.updateLogic(qs2, qs1); // empty, null
qs2.update(1); // no longer empty
result = HeapDoublesUnion.updateLogic(qs2, qs1); // valid, null
assertEquals(result.getMaxValue(), result.getMinValue(), 0.0);
}