1 files changed, 158 insertions, 0 deletions
diff --git a/net/dcsctp/socket/heartbeat_handler_test.cc b/net/dcsctp/socket/heartbeat_handler_test.cc
new file mode 100644
index 0000000000..2c5df9fd92
--- /dev/null
+++ b/net/dcsctp/socket/heartbeat_handler_test.cc
@@ -0,0 +1,158 @@
+/*
+ *  Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "net/dcsctp/socket/heartbeat_handler.h"
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "net/dcsctp/packet/chunk/heartbeat_ack_chunk.h"
+#include "net/dcsctp/packet/chunk/heartbeat_request_chunk.h"
+#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h"
+#include "net/dcsctp/public/types.h"
+#include "net/dcsctp/socket/mock_context.h"
+#include "net/dcsctp/testing/testing_macros.h"
+#include "rtc_base/gunit.h"
+#include "test/gmock.h"
+
+namespace dcsctp {
+namespace {
+using ::testing::ElementsAre;
+using ::testing::IsEmpty;
+using ::testing::NiceMock;
+using ::testing::Return;
+using ::testing::SizeIs;
+
+constexpr DurationMs kHeartbeatInterval = DurationMs(30'000);
+
+DcSctpOptions MakeOptions(DurationMs heartbeat_interval) {
+  DcSctpOptions options;
+  options.heartbeat_interval_include_rtt = false;
+  options.heartbeat_interval = heartbeat_interval;
+  return options;
+}
+
+class HeartbeatHandlerTestBase : public testing::Test {
+ protected:
+  explicit HeartbeatHandlerTestBase(DurationMs heartbeat_interval)
+      : options_(MakeOptions(heartbeat_interval)),
+        context_(&callbacks_),
+        timer_manager_([this]() { return callbacks_.CreateTimeout(); }),
+        handler_("log: ", options_, &context_, &timer_manager_) {}
+
+  void AdvanceTime(DurationMs duration) {
+    callbacks_.AdvanceTime(duration);
+    for (;;) {
+      absl::optional<TimeoutID> timeout_id = callbacks_.GetNextExpiredTimeout();
+      if (!timeout_id.has_value()) {
+        break;
+      }
+      timer_manager_.HandleTimeout(*timeout_id);
+    }
+  }
+
+  const DcSctpOptions options_;
+  NiceMock<MockDcSctpSocketCallbacks> callbacks_;
+  NiceMock<MockContext> context_;
+  TimerManager timer_manager_;
+  HeartbeatHandler handler_;
+};
+
+class HeartbeatHandlerTest : public HeartbeatHandlerTestBase {
+ protected:
+  HeartbeatHandlerTest() : HeartbeatHandlerTestBase(kHeartbeatInterval) {}
+};
+
+class DisabledHeartbeatHandlerTest : public HeartbeatHandlerTestBase {
+ protected:
+  DisabledHeartbeatHandlerTest() : HeartbeatHandlerTestBase(DurationMs(0)) {}
+};
+
+TEST_F(HeartbeatHandlerTest, HasRunningHeartbeatIntervalTimer) {
+  AdvanceTime(options_.heartbeat_interval);
+
+  // Validate that a heartbeat request was sent.
+  std::vector<uint8_t> payload = callbacks_.ConsumeSentPacket();
+  ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(payload));
+  ASSERT_THAT(packet.descriptors(), SizeIs(1));
+
+  ASSERT_HAS_VALUE_AND_ASSIGN(
+      HeartbeatRequestChunk request,
+      HeartbeatRequestChunk::Parse(packet.descriptors()[0].data));
+
+  EXPECT_TRUE(request.info().has_value());
+}
+
+TEST_F(HeartbeatHandlerTest, RepliesToHeartbeatRequests) {
+  uint8_t info_data[] = {1, 2, 3, 4, 5};
+  HeartbeatRequestChunk request(
+      Parameters::Builder().Add(HeartbeatInfoParameter(info_data)).Build());
+
+  handler_.HandleHeartbeatRequest(std::move(request));
+
+  std::vector<uint8_t> payload = callbacks_.ConsumeSentPacket();
+  ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(payload));
+  ASSERT_THAT(packet.descriptors(), SizeIs(1));
+
+  ASSERT_HAS_VALUE_AND_ASSIGN(
+      HeartbeatAckChunk response,
+      HeartbeatAckChunk::Parse(packet.descriptors()[0].data));
+
+  ASSERT_HAS_VALUE_AND_ASSIGN(
+      HeartbeatInfoParameter param,
+      response.parameters().get<HeartbeatInfoParameter>());
+
+  EXPECT_THAT(param.info(), ElementsAre(1, 2, 3, 4, 5));
+}
+
+TEST_F(HeartbeatHandlerTest, SendsHeartbeatRequestsOnIdleChannel) {
+  AdvanceTime(options_.heartbeat_interval);
+
+  // Grab the request, and make a response.
+  std::vector<uint8_t> payload = callbacks_.ConsumeSentPacket();
+  ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(payload));
+  ASSERT_THAT(packet.descriptors(), SizeIs(1));
+
+  ASSERT_HAS_VALUE_AND_ASSIGN(
+      HeartbeatRequestChunk req,
+      HeartbeatRequestChunk::Parse(packet.descriptors()[0].data));
+
+  HeartbeatAckChunk ack(std::move(req).extract_parameters());
+
+  // Respond a while later. This RTT will be measured by the handler
+  constexpr DurationMs rtt(313);
+
+  EXPECT_CALL(context_, ObserveRTT(rtt)).Times(1);
+
+  callbacks_.AdvanceTime(rtt);
+  handler_.HandleHeartbeatAck(std::move(ack));
+}
+
+TEST_F(HeartbeatHandlerTest, IncreasesErrorIfNotAckedInTime) {
+  DurationMs rto(105);
+  EXPECT_CALL(context_, current_rto).WillOnce(Return(rto));
+  AdvanceTime(options_.heartbeat_interval);
+
+  // Validate that a request was sent.
+  EXPECT_THAT(callbacks_.ConsumeSentPacket(), Not(IsEmpty()));
+
+  EXPECT_CALL(context_, IncrementTxErrorCounter).Times(1);
+  AdvanceTime(rto);
+}
+
+TEST_F(DisabledHeartbeatHandlerTest, IsReallyDisabled) {
+  AdvanceTime(options_.heartbeat_interval);
+
+  // Validate that a request was NOT sent.
+  EXPECT_THAT(callbacks_.ConsumeSentPacket(), IsEmpty());
+}
+
+}  // namespace
+}  // namespace dcsctp