105     /* Initialise ACK manager. */  in helper_init()
141  * TX ACK (Packet Threshold) Test Cases
149     const char                 *expect_ack; /* 1=ack, 2=lost, 4=discarded */
344     OSSL_QUIC_FRAME_ACK ack = {0};  in test_tx_ack_case_actual()  local
400         ack.ack_ranges      = (OSSL_QUIC_ACK_RANGE *)c->ack_ranges;  in test_tx_ack_case_actual()
401         ack.num_ack_ranges  = c->num_ack_ranges;  in test_tx_ack_case_actual()
402         if (!TEST_int_eq(ossl_ackm_on_rx_ack_frame(h.ackm, &ack, space, fake_time), 1))  in test_tx_ack_case_actual()
475  * TX ACK (Time Threshold) Test
481     TX_ACK_TIME_OP_ACK,     /* Synthesise incoming ACK of single PN range */
482     TX_ACK_TIME_OP_EXPECT   /* Ack/loss assertion */
488     QUIC_PN   pn;           /* PKT, ACK */
489     size_t    num_pn;       /* PKT, ACK */
490     const char *expect;     /* 1=ack, 2=lost, 4=discarded */
522     OSSL_QUIC_FRAME_ACK ack = {0};  in test_tx_ack_time_script()  local
532     /* Initialise ACK manager and packet structures. */  in test_tx_ack_time_script()
572                 ack.ack_ranges      = &ack_range;  in test_tx_ack_time_script()
573                 ack.num_ack_ranges  = 1;  in test_tx_ack_time_script()
581                 if (!TEST_int_eq(ossl_ackm_on_rx_ack_frame(h.ackm, &ack,  in test_tx_ack_time_script()
611  * RX ACK Test
620     RX_OPK_CHECK_ACKS,       /* check ACK ranges */
622     RX_OPK_RX_ACK,           /* RX ACK frame */
699 /* RX 1. Simple Test with ACK Desired (Packet Threshold, Exactly) */
714     /* At this point we would generate e.g. a packet with an ACK. */
717     RX_OP_RX_ACK        (0, 0, 1)   /* TX'd packet is ACK'd */
719     RX_OP_CHECK_NO_ACKS (0)         /* nothing more to ACK */
726 /* RX 2. Simple Test with ACK Not Yet Desired (Packet Threshold) (1-RTT) */
738      * (rx_script_4) for those spaces as those spaces should not delay ACK
747     /* First packet always generates an ACK so get it out of the way. */
751     RX_OP_CHECK_STATE   (0, 1, 0)   /* first packet always causes ACK */
755     /* Second packet should not cause ACK-desired state */
769     /* At this point we would generate e.g. a packet with an ACK. */
772     RX_OP_RX_ACK        (0, 0, 1)   /* TX'd packet is ACK'd */
774     RX_OP_CHECK_NO_ACKS (0)         /* nothing more to ACK */
781 /* RX 3. Simple Test with ACK Desired (Packet Threshold, Multiple Watermarks) */
798     /* First packet always generates an ACK so get it out of the way. */
802     RX_OP_CHECK_STATE   (0, 1, 0)   /* first packet always causes ACK */
814      * Test TX'ing a packet which doesn't ACK anything.
820      * At this point we would generate a packet with an ACK immediately.
846  * RX 4. Simple Test with ACK Not Yet Desired (Packet Threshold)
860     /* First packet always generates an ACK so get it out of the way. */
864     RX_OP_CHECK_STATE   (0, 1, 0)   /* first packet always causes ACK */
869      * Second packet should cause ACK-desired state because we are
879     /* At this point we would generate e.g. a packet with an ACK. */
882     RX_OP_RX_ACK        (0, 0, 1)   /* TX'd packet is ACK'd */
884     RX_OP_CHECK_NO_ACKS (0)         /* nothing more to ACK */
910     const OSSL_QUIC_FRAME_ACK *ack;  in test_rx_ack_actual()  local
921     /* Initialise ACK manager. */  in test_rx_ack_actual()
1005             ack = ossl_ackm_get_ack_frame(h.ackm, space);  in test_rx_ack_actual()
1007             /* Should always be able to get an ACK frame. */  in test_rx_ack_actual()
1008             if (!TEST_ptr(ack))  in test_rx_ack_actual()
1011             if (!TEST_size_t_eq(ack->num_ack_ranges, s->num_ack_ranges))  in test_rx_ack_actual()
1014             for (i = 0; i < ack->num_ack_ranges; ++i) {  in test_rx_ack_actual()
1015                 if (!TEST_uint64_t_eq(ack->ack_ranges[i].start,  in test_rx_ack_actual()
1018                 if (!TEST_uint64_t_eq(ack->ack_ranges[i].end,  in test_rx_ack_actual()