h.tickle();
assertEquals( 10, h.suggested() ); // avg(10, 10, 10, 10, 10) == 10
h.tickle();
assertEquals( 10, h.suggested() ); // avg(10, 10, 10, 10, 10) == 10
assertTrue( h.used( -10 ) );
assertEquals( 0, h.getUsed() );
h.tickle();
assertEquals( 10, h.suggested() ); // avg(10, 10, 10, 10, 10) == 10
h.tickle();