diff --git a/src/nebula_hesai/nebula_hesai_common/CMakeLists.txt b/src/nebula_hesai/nebula_hesai_common/CMakeLists.txt
index 383896f21..a1b58ad09 100644
--- a/src/nebula_hesai/nebula_hesai_common/CMakeLists.txt
+++ b/src/nebula_hesai/nebula_hesai_common/CMakeLists.txt
@@ -13,6 +13,15 @@ target_include_directories(
 target_link_libraries(nebula_hesai_common
                       INTERFACE nebula_core_common::nebula_core_common)
 
+if(BUILD_TESTING)
+  find_package(ament_lint_auto REQUIRED)
+  find_package(ament_cmake_gtest REQUIRED)
+  ament_lint_auto_find_test_dependencies()
+
+  ament_add_gtest(test_hesai_common test/test_hesai_common.cpp)
+  target_link_libraries(test_hesai_common nebula_hesai_common)
+endif()
+
 install(TARGETS nebula_hesai_common EXPORT export_nebula_hesai_common)
 install(DIRECTORY include/${PROJECT_NAME}/ DESTINATION include/${PROJECT_NAME})
 
diff --git a/src/nebula_hesai/nebula_hesai_common/package.xml b/src/nebula_hesai/nebula_hesai_common/package.xml
index fa4c581c3..3a35881d0 100644
--- a/src/nebula_hesai/nebula_hesai_common/package.xml
+++ b/src/nebula_hesai/nebula_hesai_common/package.xml
@@ -15,6 +15,9 @@
 
   <depend>nebula_core_common</depend>
 
+  <test_depend>ament_cmake_gtest</test_depend>
+  <test_depend>ament_lint_auto</test_depend>
+
   <export>
     <build_type>ament_cmake</build_type>
   </export>
diff --git a/src/nebula_hesai/nebula_hesai_common/test/test_hesai_common.cpp b/src/nebula_hesai/nebula_hesai_common/test/test_hesai_common.cpp
new file mode 100644
index 000000000..8fd2754ce
--- /dev/null
+++ b/src/nebula_hesai/nebula_hesai_common/test/test_hesai_common.cpp
@@ -0,0 +1,341 @@
+// Copyright 2026 TIER IV, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "nebula_hesai_common/hesai_common.hpp"
+
+#include <gtest/gtest.h>
+
+#include <array>
+#include <initializer_list>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <string_view>
+#include <tuple>
+
+namespace
+{
+
+using nebula::drivers::AdvancedFunctionalSafetyConfiguration;
+using nebula::drivers::HesaiSensorConfiguration;
+using nebula::drivers::PtpProfile;
+using nebula::drivers::PtpSwitchType;
+using nebula::drivers::PtpTransportType;
+using nebula::drivers::ReturnMode;
+using nebula::drivers::SensorModel;
+
+template <typename T>
+std::string stream_to_string(const T & value)
+{
+  std::ostringstream stream;
+  stream << value;
+  return stream.str();
+}
+
+void expect_contains_all(
+  const std::string & output, std::initializer_list<std::string_view> expected_substrings)
+{
+  for (const auto expected_substring : expected_substrings) {
+    EXPECT_NE(output.find(expected_substring), std::string::npos) << output;
+  }
+}
+
+void expect_hesai_return_mode_round_trip(
+  const SensorModel sensor_model,
+  std::initializer_list<std::tuple<std::string_view, int, ReturnMode>> expected_values)
+{
+  for (const auto & [string_value, int_value, expected_mode] : expected_values) {
+    EXPECT_EQ(
+      nebula::drivers::return_mode_from_string_hesai(std::string(string_value), sensor_model),
+      expected_mode);
+    EXPECT_EQ(nebula::drivers::return_mode_from_int_hesai(int_value, sensor_model), expected_mode);
+    EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(expected_mode, sensor_model), int_value);
+  }
+}
+
+TEST(HesaiCommonTest, PtpProfilesParseCaseInsensitivelyAndStreamExpectedValues)
+{
+  constexpr std::array<std::tuple<std::string_view, PtpProfile, std::string_view>, 3>
+    expected_values{{
+      {"1588V2", PtpProfile::IEEE_1588v2, "IEEE_1588v2"},
+      {"802.1AS", PtpProfile::IEEE_802_1AS, "IEEE_802.1AS"},
+      {"AUTOMOTIVE", PtpProfile::IEEE_802_1AS_AUTO, "IEEE_802.1AS Automotive"},
+    }};
+
+  for (const auto & [string_value, expected_profile, streamed_value] : expected_values) {
+    EXPECT_EQ(
+      nebula::drivers::ptp_profile_from_string(std::string(string_value)), expected_profile);
+    EXPECT_EQ(stream_to_string(expected_profile), streamed_value);
+  }
+
+  EXPECT_EQ(nebula::drivers::ptp_profile_from_string("unsupported"), PtpProfile::UNKNOWN_PROFILE);
+  EXPECT_EQ(stream_to_string(PtpProfile::UNKNOWN_PROFILE), "UNKNOWN");
+}
+
+TEST(HesaiCommonTest, PtpTransportTypesParseCaseInsensitivelyAndStreamExpectedValues)
+{
+  constexpr std::array<std::tuple<std::string_view, PtpTransportType, std::string_view>, 2>
+    expected_values{{
+      {"UDP", PtpTransportType::UDP_IP, "UDP/IP"},
+      {"l2", PtpTransportType::L2, "L2"},
+    }};
+
+  for (const auto & [string_value, expected_transport, streamed_value] : expected_values) {
+    EXPECT_EQ(
+      nebula::drivers::ptp_transport_type_from_string(std::string(string_value)),
+      expected_transport);
+    EXPECT_EQ(stream_to_string(expected_transport), streamed_value);
+  }
+
+  EXPECT_EQ(
+    nebula::drivers::ptp_transport_type_from_string("unsupported"),
+    PtpTransportType::UNKNOWN_TRANSPORT);
+  EXPECT_EQ(stream_to_string(PtpTransportType::UNKNOWN_TRANSPORT), "UNKNOWN");
+}
+
+TEST(HesaiCommonTest, PtpSwitchTypesParseCaseInsensitivelyAndStreamExpectedValues)
+{
+  constexpr std::array<std::tuple<std::string_view, PtpSwitchType, std::string_view>, 2>
+    expected_values{{
+      {"TSN", PtpSwitchType::TSN, "TSN"},
+      {"non_tsn", PtpSwitchType::NON_TSN, "NON_TSN"},
+    }};
+
+  for (const auto & [string_value, expected_switch, streamed_value] : expected_values) {
+    EXPECT_EQ(
+      nebula::drivers::ptp_switch_type_from_string(std::string(string_value)), expected_switch);
+    EXPECT_EQ(stream_to_string(expected_switch), streamed_value);
+  }
+
+  EXPECT_EQ(
+    nebula::drivers::ptp_switch_type_from_string("unsupported"), PtpSwitchType::UNKNOWN_SWITCH);
+  EXPECT_EQ(stream_to_string(PtpSwitchType::UNKNOWN_SWITCH), "UNKNOWN");
+}
+
+TEST(HesaiCommonTest, ReturnModeConversionsRoundTripForXtFamily)
+{
+  constexpr SensorModel sensor_model = SensorModel::HESAI_PANDARXT32;
+
+  expect_hesai_return_mode_round_trip(
+    sensor_model, {{"Last", 0, ReturnMode::LAST},
+                   {"Strongest", 1, ReturnMode::STRONGEST},
+                   {"Dual", 2, ReturnMode::DUAL_LAST_STRONGEST},
+                   {"First", 3, ReturnMode::FIRST},
+                   {"LastFirst", 4, ReturnMode::DUAL_LAST_FIRST},
+                   {"FirstStrongest", 5, ReturnMode::DUAL_FIRST_STRONGEST}});
+
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_string_hesai("LastStrongest", sensor_model),
+    ReturnMode::DUAL_LAST_STRONGEST);
+  EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(ReturnMode::DUAL, sensor_model), 2);
+}
+
+TEST(HesaiCommonTest, ReturnModeConversionsRoundTripForQt64Family)
+{
+  constexpr SensorModel sensor_model = SensorModel::HESAI_PANDARQT64;
+
+  expect_hesai_return_mode_round_trip(
+    sensor_model, {{"Last", 0, ReturnMode::LAST},
+                   {"Dual", 2, ReturnMode::DUAL_LAST_FIRST},
+                   {"First", 3, ReturnMode::FIRST}});
+
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_string_hesai("LastFirst", sensor_model),
+    ReturnMode::DUAL_LAST_FIRST);
+  EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(ReturnMode::DUAL, sensor_model), 2);
+}
+
+TEST(HesaiCommonTest, ReturnModeConversionsRoundTripForLegacyDualFamily)
+{
+  constexpr SensorModel sensor_model = SensorModel::HESAI_PANDARAT128;
+
+  expect_hesai_return_mode_round_trip(
+    sensor_model, {{"Last", 0, ReturnMode::LAST},
+                   {"Strongest", 1, ReturnMode::STRONGEST},
+                   {"Dual", 2, ReturnMode::DUAL_LAST_STRONGEST}});
+
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_string_hesai("LastStrongest", sensor_model),
+    ReturnMode::DUAL_LAST_STRONGEST);
+  EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(ReturnMode::DUAL, sensor_model), 2);
+}
+
+TEST(HesaiCommonTest, ReturnModeConversionsHandleUnexpectedValues)
+{
+  constexpr SensorModel xt_sensor_model = SensorModel::HESAI_PANDARXT16;
+  constexpr SensorModel at_sensor_model = SensorModel::HESAI_PANDAR64;
+
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_string_hesai("last", xt_sensor_model), ReturnMode::UNKNOWN);
+  EXPECT_EQ(nebula::drivers::return_mode_from_int_hesai(99, xt_sensor_model), ReturnMode::UNKNOWN);
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_string_hesai("Strongest", SensorModel::HESAI_PANDARQT64),
+    ReturnMode::UNKNOWN);
+  EXPECT_EQ(
+    nebula::drivers::return_mode_from_int_hesai(1, SensorModel::HESAI_PANDARQT64),
+    ReturnMode::UNKNOWN);
+  EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(ReturnMode::UNKNOWN, xt_sensor_model), -1);
+  EXPECT_EQ(nebula::drivers::int_from_return_mode_hesai(ReturnMode::FIRST, at_sensor_model), -1);
+}
+
+TEST(HesaiCommonTest, ReturnModeConversionsRejectUnsupportedSensorModels)
+{
+  constexpr SensorModel unsupported_model = SensorModel::VELODYNE_VLP16;
+
+  EXPECT_THROW(
+    nebula::drivers::return_mode_from_string_hesai("Last", unsupported_model), std::runtime_error);
+  EXPECT_THROW(
+    nebula::drivers::return_mode_from_int_hesai(0, unsupported_model), std::runtime_error);
+  EXPECT_THROW(
+    nebula::drivers::int_from_return_mode_hesai(ReturnMode::LAST, unsupported_model),
+    std::runtime_error);
+}
+
+TEST(HesaiCommonTest, SupportPredicatesReflectVendorCapabilities)
+{
+  EXPECT_FALSE(nebula::drivers::supports_lidar_monitor(SensorModel::HESAI_PANDARAT128));
+  EXPECT_FALSE(nebula::drivers::supports_lidar_monitor(SensorModel::HESAI_PANDAR40P));
+  EXPECT_TRUE(nebula::drivers::supports_lidar_monitor(SensorModel::HESAI_PANDARXT32));
+
+  EXPECT_TRUE(nebula::drivers::supports_functional_safety(SensorModel::HESAI_PANDAR128_E3X));
+  EXPECT_TRUE(nebula::drivers::supports_functional_safety(SensorModel::HESAI_PANDAR128_E4X));
+  EXPECT_TRUE(nebula::drivers::supports_functional_safety(SensorModel::HESAI_PANDARQT128));
+  EXPECT_FALSE(nebula::drivers::supports_functional_safety(SensorModel::HESAI_PANDARXT32));
+
+  EXPECT_TRUE(nebula::drivers::supports_packet_loss_detection(SensorModel::HESAI_PANDAR40M));
+  EXPECT_TRUE(nebula::drivers::supports_packet_loss_detection(SensorModel::HESAI_PANDAR128_E4X));
+  EXPECT_FALSE(nebula::drivers::supports_packet_loss_detection(SensorModel::HESAI_PANDARXT16));
+
+  EXPECT_TRUE(nebula::drivers::supports_blockage_mask(SensorModel::HESAI_PANDAR128_E4X));
+  EXPECT_FALSE(nebula::drivers::supports_blockage_mask(SensorModel::HESAI_PANDAR128_E3X));
+}
+
+TEST(HesaiCommonTest, AdvancedFunctionalSafetyConfigurationStreamingReflectsConfiguredValues)
+{
+  const AdvancedFunctionalSafetyConfiguration advanced{"/tmp/error-definitions.json", {0x1a, 0x2b}};
+  const AdvancedFunctionalSafetyConfiguration no_exemptions{"/tmp/error-definitions.json", {}};
+
+  expect_contains_all(
+    stream_to_string(advanced), {"advanced", "/tmp/error-definitions.json", "0x1a, 0x2b"});
+  expect_contains_all(
+    stream_to_string(no_exemptions), {"advanced", "/tmp/error-definitions.json", "none"});
+}
+
+TEST(HesaiCommonTest, DefaultInitializedSensorConfigurationStreamsWithoutCrashing)
+{
+  const HesaiSensorConfiguration configuration{};
+  EXPECT_NO_THROW({
+    const auto output = stream_to_string(configuration);
+    EXPECT_FALSE(output.empty());
+  });
+}
+
+TEST(HesaiCommonTest, HesaiSensorConfigurationStreamingReflectsConfiguredValues)
+{
+  HesaiSensorConfiguration configuration{};
+  configuration.sensor_model = SensorModel::HESAI_PANDAR128_E4X;
+  configuration.frame_id = "hesai_frame";
+  configuration.host_ip = "192.168.1.10";
+  configuration.sensor_ip = "192.168.1.201";
+  configuration.data_port = 2368;
+  configuration.return_mode = ReturnMode::DUAL_LAST_STRONGEST;
+  configuration.packet_mtu_size = 1200;
+  configuration.min_range = 1.0;
+  configuration.max_range = 200.0;
+  configuration.use_sensor_time = true;
+  configuration.multicast_ip = "239.1.2.3";
+  configuration.gnss_port = 10110;
+  configuration.udp_socket_receive_buffer_size_bytes = 4096;
+  configuration.sync_angle = 123;
+  configuration.cut_angle = 45.5;
+  configuration.dual_return_distance_threshold = 0.75;
+  configuration.calibration_path = "/tmp/hesai.csv";
+  configuration.calibration_download_enabled = true;
+  configuration.rotation_speed = 1200;
+  configuration.cloud_min_angle = 100;
+  configuration.cloud_max_angle = 200;
+  configuration.ptp_profile = PtpProfile::IEEE_802_1AS_AUTO;
+  configuration.ptp_domain = 7;
+  configuration.ptp_transport_type = PtpTransportType::UDP_IP;
+  configuration.ptp_switch_type = PtpSwitchType::TSN;
+  configuration.ptp_lock_threshold = 4;
+  configuration.downsample_mask_path = "/tmp/downsample.png";
+  configuration.hires_mode = true;
+  configuration.blockage_mask_horizontal_bin_size_mdeg = 250;
+  configuration.sync_diagnostics_topic = "/sync_diag/graph_updates";
+  configuration.functional_safety =
+    AdvancedFunctionalSafetyConfiguration{"/tmp/error-definitions.json", {0x1a, 0x2b}};
+
+  const std::string output = stream_to_string(configuration);
+
+  expect_contains_all(
+    output, {"Hesai Sensor Configuration:",
+             "Sensor Model: Pandar128_E4X_OT",
+             "Frame ID: hesai_frame",
+             "Host IP: 192.168.1.10",
+             "Sensor IP: 192.168.1.201",
+             "Data Port: 2368",
+             "Return Mode: LastStrongest",
+             "MTU: 1200",
+             "Use Sensor Time: 1",
+             "Multicast: enabled, group: 239.1.2.3",
+             "GNSS Port: 10110",
+             "UDP Socket Receive Buffer Size: 4096 B",
+             "Rotation Speed: 1200",
+             "Sync Angle: 123",
+             "Cut Angle: 45.5",
+             "FoV Start: 100",
+             "FoV End: 200",
+             "Dual Return Distance Threshold: 0.75",
+             "Calibration Path: /tmp/hesai.csv",
+             "Calibration Download: enabled",
+             "PTP Profile: IEEE_802.1AS Automotive",
+             "PTP Domain: 7",
+             "PTP Transport Type: UDP/IP",
+             "PTP Switch Type: TSN",
+             "PTP Lock Threshold: 4",
+             "High Resolution Mode: enabled",
+             "Downsample Filter: enabled, path: /tmp/downsample.png",
+             "Blockage Mask Output: enabled, horizontal bin size: 250 mdeg",
+             "Synchronization Diagnostics: enabled, topic: /sync_diag/graph_updates",
+             "Functional Safety: advanced",
+             "/tmp/error-definitions.json",
+             "0x1a, 0x2b"});
+}
+
+TEST(HesaiCommonTest, HesaiSensorConfigurationStreamingHandlesDisabledOptionals)
+{
+  HesaiSensorConfiguration configuration{};
+  configuration.sensor_model = SensorModel::HESAI_PANDARXT32;
+
+  const std::string output = stream_to_string(configuration);
+
+  expect_contains_all(
+    output, {"Multicast: disabled", "Calibration Download: disabled",
+             "High Resolution Mode: disabled", "Downsample Filter: disabled",
+             "Blockage Mask Output: disabled", "Synchronization Diagnostics: disabled"});
+  EXPECT_EQ(output.find("Functional Safety:"), std::string::npos) << output;
+}
+
+TEST(HesaiCommonTest, HesaiSensorConfigurationStreamingFallsBackToBasicFunctionalSafety)
+{
+  HesaiSensorConfiguration configuration{};
+  configuration.sensor_model = SensorModel::HESAI_PANDARQT128;
+
+  const std::string output = stream_to_string(configuration);
+
+  EXPECT_NE(output.find("Functional Safety: basic"), std::string::npos) << output;
+}
+
+}  // namespace