tests: Bluetooth: ascs: Add ISO Data PDU recv tests

This adds tests for receiving ISO Data PDU.
* test_recv_in_streaming_state - test whether received ISO Data PDU is
  sent to upper layers.
* test_recv_in_enabling_state - test whether received ISO Data PDu is
  dropped because upper layer is not ready to receive the data yet.

Signed-off-by: Mariusz Skamra <[email protected]>

Author: MariuszSkamra

tests/bluetooth/audio/ascs/src/main.c

@@ -421,3 +421,61 @@ ZTEST_F(ascs_test_suite, test_release_stream_pair_on_acl_disconnection_server_te
 
 	bt_bap_unicast_server_unregister_cb(&mock_bap_unicast_server_cb);
 }
+
+ZTEST_F(ascs_test_suite, test_recv_in_streaming_state)
+{
+	struct bt_bap_stream *stream = &fixture->stream;
+	struct bt_conn *conn = &fixture->conn;
+	uint8_t ase_id = fixture->ase_snk.id;
+	struct bt_iso_recv_info info = {
+		.seq_num = 1,
+		.flags = BT_ISO_FLAGS_VALID,
+	};
+	struct bt_iso_chan *chan;
+	struct net_buf buf;
+
+	Z_TEST_SKIP_IFNDEF(CONFIG_BT_ASCS_ASE_SNK);
+
+	bt_bap_unicast_server_register_cb(&mock_bap_unicast_server_cb);
+
+	test_preamble_state_streaming(conn, ase_id, stream, &chan, false);
+
+	chan->ops->recv(chan, &info, &buf);
+
+	/* Verification */
+	expect_bt_bap_stream_ops_recv_called_once(stream, &info, &buf);
+
+	bt_bap_unicast_server_unregister_cb(&mock_bap_unicast_server_cb);
+}
+
+ZTEST_F(ascs_test_suite, test_recv_in_enabling_state)
+{
+	struct bt_bap_stream *stream = &fixture->stream;
+	struct bt_conn *conn = &fixture->conn;
+	uint8_t ase_id = fixture->ase_snk.id;
+	struct bt_iso_recv_info info = {
+		.seq_num = 1,
+		.flags = BT_ISO_FLAGS_VALID,
+	};
+	struct bt_iso_chan *chan;
+	struct net_buf buf;
+	int err;
+
+	Z_TEST_SKIP_IFNDEF(CONFIG_BT_ASCS_ASE_SNK);
+
+	bt_bap_unicast_server_register_cb(&mock_bap_unicast_server_cb);
+
+	test_preamble_state_enabling(conn, ase_id, stream);
+
+	err = mock_bt_iso_accept(conn, 0x01, 0x01, &chan);
+	zassert_equal(0, err, "Failed to connect iso: err %d", err);
+
+	test_mocks_reset();
+
+	chan->ops->recv(chan, &info, &buf);
+
+	/* Verification */
+	expect_bt_bap_stream_ops_recv_not_called();
+
+	bt_bap_unicast_server_unregister_cb(&mock_bap_unicast_server_cb);
+}

tests/bluetooth/audio/mocks/CMakeLists.txt

@@ -16,6 +16,7 @@ add_library(mocks STATIC
   src/iso.c
   src/kernel.c
   src/mem_slab.c
+  src/net_buf.c
   src/pacs.c
 )
 

tests/bluetooth/audio/mocks/src/net_buf.c

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2023 Codecoup
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <kernel.h>
+#include <zephyr/net/buf.h>
+
+void net_buf_unref(struct net_buf *buf)
+{
+
+}