DeliveryOptions options = new DeliveryOptions();
assertIllegalArgumentException(() -> options.setSendTimeout(0));
assertIllegalArgumentException(() -> options.setSendTimeout(-1));
assertNullPointerException(() -> options.addHeader(null, ""));
assertNullPointerException(() -> options.addHeader("", null));
}
@Test
public void testArgumentValidation() throws Exception {
assertNullPointerException(() -> eb.send(null, ""));