### Question:
ValidationHelper { void incrementDroppedHttp(int amount) { measurementsDroppedHttp.increment(amount); } ValidationHelper(Logger logger, ObjectMapper jsonMapper, Registry registry);   }### Answer:
@Test public void incrementDroppedHttp() { Registry registry = new DefaultRegistry(); ValidationHelper helper = new ValidationHelper(LOGGER, MAPPER, registry); helper.incrementDroppedHttp(42); check(registry, 0, 42, 0, 0); }