src/connectivity/bluetooth/core/bt-host/testing/fake_controller_test.cc

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/testing/fake_controller.h"

#include <chrono>
#include <cstddef>
#include <cstdint>

#include <gtest/gtest.h>
#include <pw_async/fake_dispatcher_fixture.h>

#include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/hci-spec/protocol.h"

#include <pw_bluetooth/hci_events.emb.h>

namespace bt::testing {

using FakeControllerTest = pw::async::test::FakeDispatcherFixture;

TEST_F(FakeControllerTest, TestInquiryCommand) {
  FakeController controller(dispatcher());

  int event_cb_count = 0;
  controller.SetEventFunction(
      [&event_cb_count](pw::span<const std::byte> packet_bytes) {
        auto header_view = pw::bluetooth::emboss::MakeEventHeaderView(
            reinterpret_cast<const uint8_t*>(packet_bytes.data()),
            packet_bytes.size());

        if (header_view.event_code_uint().Read() ==
            hci_spec::kCommandStatusEventCode) {
          std::unique_ptr<hci::EventPacket> event = hci::EventPacket::New(
              packet_bytes.size() - sizeof(hci_spec::EventHeader));
          event->mutable_view()->mutable_data().Write(
              reinterpret_cast<const uint8_t*>(packet_bytes.data()),
              packet_bytes.size());
          event->InitializeFromBuffer();
          pw::bluetooth::emboss::StatusCode status;
          event->ToStatusCode(&status);
          EXPECT_EQ(status, pw::bluetooth::emboss::StatusCode::SUCCESS);
          ++event_cb_count;
        }

        else if (header_view.event_code_uint().Read() ==
                 hci_spec::kInquiryCompleteEventCode) {
          auto inquiry_complete_view =
              pw::bluetooth::emboss::MakeInquiryCompleteEventView(
                  reinterpret_cast<const uint8_t*>(packet_bytes.data()),
                  packet_bytes.size());
          EXPECT_EQ(inquiry_complete_view.status().Read(),
                    pw::bluetooth::emboss::StatusCode::SUCCESS);
          ++event_cb_count;
        }

        else {
          ADD_FAILURE() << "Unexpected Event packet received";
        }
      });

  auto inquiry = hci::EmbossCommandPacket::New<
      pw::bluetooth::emboss::InquiryCommandWriter>(hci_spec::kInquiry);
  auto view = inquiry.view_t();
  view.lap().Write(pw::bluetooth::emboss::InquiryAccessCode::GIAC);
  view.inquiry_length().Write(8);
  view.num_responses().Write(0);
  controller.SendCommand(inquiry.data().subspan());

  // The maximum amount of time before Inquiry is halted is calculated as
  // inquiry_length * 1.28 s. FakeController:OnInquiry simulates this by posting
  // the InquiryCompleteEvent to be returned after this duration.
  RunFor(std::chrono::milliseconds(
      static_cast<int64_t>(view.inquiry_length().Read()) * 1280));

  EXPECT_EQ(event_cb_count, 2);
}

}  // namespace bt::testing