### Question:
Util { public static boolean isClassAPositionReport(int messageId) { return messageId == 1 || messageId == 2 || messageId == 3; } private  Util(); static void checkLatLong(double lat, double lon); static void checkLat(double lat); static void checkLong(double lon); static void checkArgument(boolean b, String message); static AisExtractorFactory getAisExtractorFactory(); static void checkMessageId(int messageId, AisMessageType... messageTypes); static boolean areEqual(int i, int j); static boolean isClassAPositionReport(int messageId);  }### Answer:
@Test public void testIsClassAPositionReport() { assertTrue(Util.isClassAPositionReport(1)); assertTrue(Util.isClassAPositionReport(2)); assertTrue(Util.isClassAPositionReport(3)); assertFalse(Util.isClassAPositionReport(4)); }