### Question:
Check { public static void notNull(Object object) { if (object == null) { throw new LionEngineException(ERROR_NULL); } } private  Check(); static void superiorOrEqual(int a, int b); static void superiorOrEqual(double a, double b); static void superiorStrict(int a, int b); static void superiorStrict(double a, double b); static void inferiorOrEqual(int a, int b); static void inferiorOrEqual(double a, double b); static void inferiorStrict(int a, int b); static void inferiorStrict(double a, double b); static void different(int a, int b); static void different(double a, double b); static void equality(int a, int b); static void notNull(Object object);  }### Answer:
@Test void testNotNull() { Check.notNull(new Object()); }
@Test void testNotNullFail() { assertThrows(() -> Check.notNull(null), Check.ERROR_NULL); }