@Test
public void should_set_first_block_header_for_request_bert() {

    capabilities.put(LOCAL_5683, new CoapTcpCSM(3300, true));
    CoapPacket coap = newCoapPacket(LOCAL_5683).payload(new byte[5000]).post().build();
    assertEquals(2, bwt.updateWithFirstBlock(coap));
    assertEquals(5000, coap.headers().getSize1().intValue());
    assertEquals(new BlockOption(0, BlockSize.S_1024_BERT, true), coap.headers().getBlock1Req());
    assertNull(coap.headers().getSize2Res());
    assertNull(coap.headers().getBlock2Res());
    assertEquals(2048, coap.getPayload().length);
}