test/pid_zone_unittest.cpp - openbmc/phosphor-pid-control - Gitiles

 #include "pid/ec/pid.hpp"
 #include "pid/zone.hpp"
 #include "sensors/manager.hpp"
 #include "test/controller_mock.hpp"
 #include "test/helpers.hpp"
 #include "test/sensor_mock.hpp"

 #include <chrono>
 #include <cstring>
 #include <sdbusplus/test/sdbus_mock.hpp>
 #include <vector>

 #include <gmock/gmock.h>
 #include <gtest/gtest.h>

 using ::testing::_;
 using ::testing::IsNull;
 using ::testing::Return;
 using ::testing::StrEq;

 static std::string modeInterface = "xyz.openbmc_project.Control.Mode";

 namespace
 {

 TEST(PidZoneConstructorTest, BoringConstructorTest)
 {
     // Build a PID Zone.

     sdbusplus::SdBusMock sdbus_mock_passive, sdbus_mock_host, sdbus_mock_mode;
     auto bus_mock_passive = sdbusplus::get_mocked_new(&sdbus_mock_passive);
     auto bus_mock_host = sdbusplus::get_mocked_new(&sdbus_mock_host);
     auto bus_mock_mode = sdbusplus::get_mocked_new(&sdbus_mock_mode);

     EXPECT_CALL(sdbus_mock_host,
                 sd_bus_add_object_manager(
                     IsNull(), _, StrEq("/xyz/openbmc_project/extsensors")))
         .WillOnce(Return(0));

     SensorManager m(std::move(bus_mock_passive), std::move(bus_mock_host));

     bool defer = true;
     const char* objPath = "/path/";
     int64_t zone = 1;
     double minThermalOutput = 1000.0;
     double failSafePercent = 0.75;

     int i;
     std::vector<std::string> properties;
     SetupDbusObject(&sdbus_mock_mode, defer, objPath, modeInterface, properties,
                     &i);

     PIDZone p(zone, minThermalOutput, failSafePercent, m, bus_mock_mode,
               objPath, defer);
     // Success.
 }

 } // namespace

 class PidZoneTest : public ::testing::Test
 {
   protected:
     PidZoneTest() :
         property_index(), properties(), sdbus_mock_passive(), sdbus_mock_host(),
         sdbus_mock_mode()
     {
         EXPECT_CALL(sdbus_mock_host,
                     sd_bus_add_object_manager(
                         IsNull(), _, StrEq("/xyz/openbmc_project/extsensors")))
             .WillOnce(Return(0));

         auto bus_mock_passive = sdbusplus::get_mocked_new(&sdbus_mock_passive);
         auto bus_mock_host = sdbusplus::get_mocked_new(&sdbus_mock_host);
         auto bus_mock_mode = sdbusplus::get_mocked_new(&sdbus_mock_mode);

         // Compiler weirdly not happy about just instantiating mgr(...);
         SensorManager m(std::move(bus_mock_passive), std::move(bus_mock_host));
         mgr = std::move(m);

         SetupDbusObject(&sdbus_mock_mode, defer, objPath, modeInterface,
                         properties, &property_index);

         zone =
             std::make_unique<PIDZone>(zoneId, minThermalOutput, failSafePercent,
                                       mgr, bus_mock_mode, objPath, defer);
     }

     // unused
     int property_index;
     std::vector<std::string> properties;

     sdbusplus::SdBusMock sdbus_mock_passive;
     sdbusplus::SdBusMock sdbus_mock_host;
     sdbusplus::SdBusMock sdbus_mock_mode;
     int64_t zoneId = 1;
     double minThermalOutput = 1000.0;
     double failSafePercent = 0.75;
     bool defer = true;
     const char* objPath = "/path/";
     SensorManager mgr;

     std::unique_ptr<PIDZone> zone;
 };

 TEST_F(PidZoneTest, GetZoneId_ReturnsExpected)
 {
     // Verifies the zoneId returned is what we expect.

     EXPECT_EQ(zoneId, zone->getZoneID());
 }

 TEST_F(PidZoneTest, GetAndSetManualModeTest_BehavesAsExpected)
 {
     // Verifies that the zone starts in manual mode.  Verifies that one can set
     // the mode.
     EXPECT_FALSE(zone->getManualMode());

     zone->setManualMode(true);
     EXPECT_TRUE(zone->getManualMode());
 }

 TEST_F(PidZoneTest, RpmSetPoints_AddMaxClear_BehaveAsExpected)
 {
     // Tests addRPMSetPoint, clearRPMSetPoints, determineMaxRPMRequest
     // and getMinThermalRPMSetpoint.

     // At least one value must be above the minimum thermal setpoint used in
     // the constructor otherwise it'll choose that value
     std::vector<double> values = {100, 200, 300, 400, 500, 5000};
     for (auto v : values)
     {
         zone->addRPMSetPoint(v);
     }

     // This will pull the maximum RPM setpoint request.
     zone->determineMaxRPMRequest();
     EXPECT_EQ(5000, zone->getMaxRPMRequest());

     // Clear the values, so it'll choose the minimum thermal setpoint.
     zone->clearRPMSetPoints();

     // This will go through the RPM set point values and grab the maximum.
     zone->determineMaxRPMRequest();
     EXPECT_EQ(zone->getMinThermalRPMSetpoint(), zone->getMaxRPMRequest());
 }

 TEST_F(PidZoneTest, RpmSetPoints_AddBelowMinimum_BehavesAsExpected)
 {
     // Tests adding several RPM setpoints, however, they're all lower than the
     // configured minimal thermal setpoint RPM value.

     std::vector<double> values = {100, 200, 300, 400, 500};
     for (auto v : values)
     {
         zone->addRPMSetPoint(v);
     }

     // This will pull the maximum RPM setpoint request.
     zone->determineMaxRPMRequest();

     // Verifies the value returned in the minimal thermal rpm set point.
     EXPECT_EQ(zone->getMinThermalRPMSetpoint(), zone->getMaxRPMRequest());
 }

 TEST_F(PidZoneTest, GetFailSafePercent_ReturnsExpected)
 {
     // Verify the value used to create the object is stored.
     EXPECT_EQ(failSafePercent, zone->getFailSafePercent());
 }

 TEST_F(PidZoneTest, ThermalInputs_FailsafeToValid_ReadsSensors)
 {
     // This test will add a couple thermal inputs, and verify that the zone
     // initializes into failsafe mode, and will read each sensor.

     std::string name1 = "temp1";
     int64_t timeout = 1;

     std::unique_ptr<Sensor> sensor1 =
         std::make_unique<SensorMock>(name1, timeout);
     SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

     std::string name2 = "temp2";
     std::unique_ptr<Sensor> sensor2 =
         std::make_unique<SensorMock>(name2, timeout);
     SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

     std::string type = "unchecked";
     mgr.addSensor(type, name1, std::move(sensor1));
     EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
     mgr.addSensor(type, name2, std::move(sensor2));
     EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

     // Now that the sensors exist, add them to the zone.
     zone->addThermalInput(name1);
     zone->addThermalInput(name2);

     // Initialize Zone
     zone->initializeCache();

     // Verify now in failsafe mode.
     EXPECT_TRUE(zone->getFailSafeMode());

     ReadReturn r1;
     r1.value = 10.0;
     r1.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

     ReadReturn r2;
     r2.value = 11.0;
     r2.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

     // Read the sensors, this will put the values into the cache.
     zone->updateSensors();

     // We should no longer be in failsafe mode.
     EXPECT_FALSE(zone->getFailSafeMode());

     EXPECT_EQ(r1.value, zone->getCachedValue(name1));
     EXPECT_EQ(r2.value, zone->getCachedValue(name2));
 }

 TEST_F(PidZoneTest, FanInputTest_VerifiesFanValuesCached)
 {
     // This will add a couple fan inputs, and verify the values are cached.

     std::string name1 = "fan1";
     int64_t timeout = 2;

     std::unique_ptr<Sensor> sensor1 =
         std::make_unique<SensorMock>(name1, timeout);
     SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

     std::string name2 = "fan2";
     std::unique_ptr<Sensor> sensor2 =
         std::make_unique<SensorMock>(name2, timeout);
     SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

     std::string type = "unchecked";
     mgr.addSensor(type, name1, std::move(sensor1));
     EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
     mgr.addSensor(type, name2, std::move(sensor2));
     EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

     // Now that the sensors exist, add them to the zone.
     zone->addFanInput(name1);
     zone->addFanInput(name2);

     // Initialize Zone
     zone->initializeCache();

     ReadReturn r1;
     r1.value = 10.0;
     r1.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

     ReadReturn r2;
     r2.value = 11.0;
     r2.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

     // Method under test will read through each fan sensor for the zone and
     // cache the values.
     zone->updateFanTelemetry();

     EXPECT_EQ(r1.value, zone->getCachedValue(name1));
     EXPECT_EQ(r2.value, zone->getCachedValue(name2));
 }

 TEST_F(PidZoneTest, ThermalInput_ValueTimeoutEntersFailSafeMode)
 {
     // On the second updateSensors call, the updated timestamp will be beyond
     // the timeout limit.

     int64_t timeout = 1;

     std::string name1 = "temp1";
     std::unique_ptr<Sensor> sensor1 =
         std::make_unique<SensorMock>(name1, timeout);
     SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

     std::string name2 = "temp2";
     std::unique_ptr<Sensor> sensor2 =
         std::make_unique<SensorMock>(name2, timeout);
     SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

     std::string type = "unchecked";
     mgr.addSensor(type, name1, std::move(sensor1));
     EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
     mgr.addSensor(type, name2, std::move(sensor2));
     EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

     zone->addThermalInput(name1);
     zone->addThermalInput(name2);

     // Initialize Zone
     zone->initializeCache();

     // Verify now in failsafe mode.
     EXPECT_TRUE(zone->getFailSafeMode());

     ReadReturn r1;
     r1.value = 10.0;
     r1.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

     ReadReturn r2;
     r2.value = 11.0;
     r2.updated = std::chrono::high_resolution_clock::now();
     EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

     zone->updateSensors();
     EXPECT_FALSE(zone->getFailSafeMode());

     // Ok, so we're not in failsafe mode, so let's set updated to the past.
     // sensor1 will have an updated field older than its timeout value, but
     // sensor2 will be fine. :D
     r1.updated -= std::chrono::seconds(3);
     r2.updated = std::chrono::high_resolution_clock::now();

     EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));
     EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

     // Method under test will read each sensor.  One sensor's value is older
     // than the timeout for that sensor and this triggers failsafe mode.
     zone->updateSensors();
     EXPECT_TRUE(zone->getFailSafeMode());
 }

 TEST_F(PidZoneTest, GetSensorTest_ReturnsExpected)
 {
     // One can grab a sensor from the manager through the zone.

     int64_t timeout = 1;

     std::string name1 = "temp1";
     std::unique_ptr<Sensor> sensor1 =
         std::make_unique<SensorMock>(name1, timeout);
     SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

     std::string type = "unchecked";
     mgr.addSensor(type, name1, std::move(sensor1));
     EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);

     zone->addThermalInput(name1);

     // Verify method under test returns the pointer we expect.
     EXPECT_EQ(mgr.getSensor(name1), zone->getSensor(name1));
 }

 TEST_F(PidZoneTest, AddThermalPIDTest_VerifiesThermalPIDsProcessed)
 {
     // Tests adding a thermal PID controller to the zone, and verifies it's
     // touched during processing.

     std::unique_ptr<PIDController> tpid =
         std::make_unique<ControllerMock>("thermal1", zone.get());
     ControllerMock* tmock = reinterpret_cast<ControllerMock*>(tpid.get());

     // Access the internal pid configuration to clear it out (unrelated to the
     // test).
     ec::pid_info_t* info = tpid->getPIDInfo();
     std::memset(info, 0x00, sizeof(ec::pid_info_t));

     zone->addThermalPID(std::move(tpid));

     EXPECT_CALL(*tmock, setptProc()).WillOnce(Return(10.0));
     EXPECT_CALL(*tmock, inputProc()).WillOnce(Return(11.0));
     EXPECT_CALL(*tmock, outputProc(_));

     // Method under test will, for each thermal PID, call setpt, input, and
     // output.
     zone->processThermals();
 }

 TEST_F(PidZoneTest, AddFanPIDTest_VerifiesFanPIDsProcessed)
 {
     // Tests adding a fan PID controller to the zone, and verifies it's
     // touched during processing.

     std::unique_ptr<PIDController> tpid =
         std::make_unique<ControllerMock>("fan1", zone.get());
     ControllerMock* tmock = reinterpret_cast<ControllerMock*>(tpid.get());

     // Access the internal pid configuration to clear it out (unrelated to the
     // test).
     ec::pid_info_t* info = tpid->getPIDInfo();
     std::memset(info, 0x00, sizeof(ec::pid_info_t));

     zone->addFanPID(std::move(tpid));

     EXPECT_CALL(*tmock, setptProc()).WillOnce(Return(10.0));
     EXPECT_CALL(*tmock, inputProc()).WillOnce(Return(11.0));
     EXPECT_CALL(*tmock, outputProc(_));

     // Method under test will, for each fan PID, call setpt, input, and output.
     zone->processFans();
 }

 TEST_F(PidZoneTest, ManualModeDbusTest_VerifySetManualBehavesAsExpected)
 {
     // The manual(bool) method is inherited from the dbus mode interface.

     // Verifies that someone doesn't remove the internal call to the dbus
     // object from which we're inheriting.
     EXPECT_CALL(sdbus_mock_mode,
                 sd_bus_emit_properties_changed_strv(
                     IsNull(), StrEq(objPath), StrEq(modeInterface), NotNull()))
         .WillOnce(Invoke([&](sd_bus* bus, const char* path,
                              const char* interface, char** names) {
             EXPECT_STREQ("Manual", names[0]);
             return 0;
         }));

     // Method under test will set the manual mode to true and broadcast this
     // change on dbus.
     zone->manual(true);
     EXPECT_TRUE(zone->getManualMode());
 }

 TEST_F(PidZoneTest, FailsafeDbusTest_VerifiesReturnsExpected)
 {
     // This property is implemented by us as read-only, such that trying to
     // write to it will have no effect.
     EXPECT_EQ(zone->failSafe(), zone->getFailSafeMode());
 }
	#include "pid/ec/pid.hpp"
	#include "pid/zone.hpp"
	#include "sensors/manager.hpp"
	#include "test/controller_mock.hpp"
	#include "test/helpers.hpp"
	#include "test/sensor_mock.hpp"

	#include <chrono>
	#include <cstring>
	#include <sdbusplus/test/sdbus_mock.hpp>
	#include <vector>

	#include <gmock/gmock.h>
	#include <gtest/gtest.h>

	using ::testing::_;
	using ::testing::IsNull;
	using ::testing::Return;
	using ::testing::StrEq;

	static std::string modeInterface = "xyz.openbmc_project.Control.Mode";

	namespace
	{

	TEST(PidZoneConstructorTest, BoringConstructorTest)
	{
	// Build a PID Zone.

	sdbusplus::SdBusMock sdbus_mock_passive, sdbus_mock_host, sdbus_mock_mode;
	auto bus_mock_passive = sdbusplus::get_mocked_new(&sdbus_mock_passive);
	auto bus_mock_host = sdbusplus::get_mocked_new(&sdbus_mock_host);
	auto bus_mock_mode = sdbusplus::get_mocked_new(&sdbus_mock_mode);

	EXPECT_CALL(sdbus_mock_host,
	sd_bus_add_object_manager(
	IsNull(), _, StrEq("/xyz/openbmc_project/extsensors")))
	.WillOnce(Return(0));

	SensorManager m(std::move(bus_mock_passive), std::move(bus_mock_host));

	bool defer = true;
	const char* objPath = "/path/";
	int64_t zone = 1;
	double minThermalOutput = 1000.0;
	double failSafePercent = 0.75;

	int i;
	std::vector<std::string> properties;
	SetupDbusObject(&sdbus_mock_mode, defer, objPath, modeInterface, properties,
	&i);

	PIDZone p(zone, minThermalOutput, failSafePercent, m, bus_mock_mode,
	objPath, defer);
	// Success.
	}

	} // namespace

	class PidZoneTest : public ::testing::Test
	{
	protected:
	PidZoneTest() :
	property_index(), properties(), sdbus_mock_passive(), sdbus_mock_host(),
	sdbus_mock_mode()
	{
	EXPECT_CALL(sdbus_mock_host,
	sd_bus_add_object_manager(
	IsNull(), _, StrEq("/xyz/openbmc_project/extsensors")))
	.WillOnce(Return(0));

	auto bus_mock_passive = sdbusplus::get_mocked_new(&sdbus_mock_passive);
	auto bus_mock_host = sdbusplus::get_mocked_new(&sdbus_mock_host);
	auto bus_mock_mode = sdbusplus::get_mocked_new(&sdbus_mock_mode);

	// Compiler weirdly not happy about just instantiating mgr(...);
	SensorManager m(std::move(bus_mock_passive), std::move(bus_mock_host));
	mgr = std::move(m);

	SetupDbusObject(&sdbus_mock_mode, defer, objPath, modeInterface,
	properties, &property_index);

	zone =
	std::make_unique<PIDZone>(zoneId, minThermalOutput, failSafePercent,
	mgr, bus_mock_mode, objPath, defer);
	}

	// unused
	int property_index;
	std::vector<std::string> properties;

	sdbusplus::SdBusMock sdbus_mock_passive;
	sdbusplus::SdBusMock sdbus_mock_host;
	sdbusplus::SdBusMock sdbus_mock_mode;
	int64_t zoneId = 1;
	double minThermalOutput = 1000.0;
	double failSafePercent = 0.75;
	bool defer = true;
	const char* objPath = "/path/";
	SensorManager mgr;

	std::unique_ptr<PIDZone> zone;
	};

	TEST_F(PidZoneTest, GetZoneId_ReturnsExpected)
	{
	// Verifies the zoneId returned is what we expect.

	EXPECT_EQ(zoneId, zone->getZoneID());
	}

	TEST_F(PidZoneTest, GetAndSetManualModeTest_BehavesAsExpected)
	{
	// Verifies that the zone starts in manual mode. Verifies that one can set
	// the mode.
	EXPECT_FALSE(zone->getManualMode());

	zone->setManualMode(true);
	EXPECT_TRUE(zone->getManualMode());
	}

	TEST_F(PidZoneTest, RpmSetPoints_AddMaxClear_BehaveAsExpected)
	{
	// Tests addRPMSetPoint, clearRPMSetPoints, determineMaxRPMRequest
	// and getMinThermalRPMSetpoint.

	// At least one value must be above the minimum thermal setpoint used in
	// the constructor otherwise it'll choose that value
	std::vector<double> values = {100, 200, 300, 400, 500, 5000};
	for (auto v : values)
	{
	zone->addRPMSetPoint(v);
	}

	// This will pull the maximum RPM setpoint request.
	zone->determineMaxRPMRequest();
	EXPECT_EQ(5000, zone->getMaxRPMRequest());

	// Clear the values, so it'll choose the minimum thermal setpoint.
	zone->clearRPMSetPoints();

	// This will go through the RPM set point values and grab the maximum.
	zone->determineMaxRPMRequest();
	EXPECT_EQ(zone->getMinThermalRPMSetpoint(), zone->getMaxRPMRequest());
	}

	TEST_F(PidZoneTest, RpmSetPoints_AddBelowMinimum_BehavesAsExpected)
	{
	// Tests adding several RPM setpoints, however, they're all lower than the
	// configured minimal thermal setpoint RPM value.

	std::vector<double> values = {100, 200, 300, 400, 500};
	for (auto v : values)
	{
	zone->addRPMSetPoint(v);
	}

	// This will pull the maximum RPM setpoint request.
	zone->determineMaxRPMRequest();

	// Verifies the value returned in the minimal thermal rpm set point.
	EXPECT_EQ(zone->getMinThermalRPMSetpoint(), zone->getMaxRPMRequest());
	}

	TEST_F(PidZoneTest, GetFailSafePercent_ReturnsExpected)
	{
	// Verify the value used to create the object is stored.
	EXPECT_EQ(failSafePercent, zone->getFailSafePercent());
	}

	TEST_F(PidZoneTest, ThermalInputs_FailsafeToValid_ReadsSensors)
	{
	// This test will add a couple thermal inputs, and verify that the zone
	// initializes into failsafe mode, and will read each sensor.

	std::string name1 = "temp1";
	int64_t timeout = 1;

	std::unique_ptr<Sensor> sensor1 =
	std::make_unique<SensorMock>(name1, timeout);
	SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

	std::string name2 = "temp2";
	std::unique_ptr<Sensor> sensor2 =
	std::make_unique<SensorMock>(name2, timeout);
	SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

	std::string type = "unchecked";
	mgr.addSensor(type, name1, std::move(sensor1));
	EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
	mgr.addSensor(type, name2, std::move(sensor2));
	EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

	// Now that the sensors exist, add them to the zone.
	zone->addThermalInput(name1);
	zone->addThermalInput(name2);

	// Initialize Zone
	zone->initializeCache();

	// Verify now in failsafe mode.
	EXPECT_TRUE(zone->getFailSafeMode());

	ReadReturn r1;
	r1.value = 10.0;
	r1.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

	ReadReturn r2;
	r2.value = 11.0;
	r2.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

	// Read the sensors, this will put the values into the cache.
	zone->updateSensors();

	// We should no longer be in failsafe mode.
	EXPECT_FALSE(zone->getFailSafeMode());

	EXPECT_EQ(r1.value, zone->getCachedValue(name1));
	EXPECT_EQ(r2.value, zone->getCachedValue(name2));
	}

	TEST_F(PidZoneTest, FanInputTest_VerifiesFanValuesCached)
	{
	// This will add a couple fan inputs, and verify the values are cached.

	std::string name1 = "fan1";
	int64_t timeout = 2;

	std::unique_ptr<Sensor> sensor1 =
	std::make_unique<SensorMock>(name1, timeout);
	SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

	std::string name2 = "fan2";
	std::unique_ptr<Sensor> sensor2 =
	std::make_unique<SensorMock>(name2, timeout);
	SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

	std::string type = "unchecked";
	mgr.addSensor(type, name1, std::move(sensor1));
	EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
	mgr.addSensor(type, name2, std::move(sensor2));
	EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

	// Now that the sensors exist, add them to the zone.
	zone->addFanInput(name1);
	zone->addFanInput(name2);

	// Initialize Zone
	zone->initializeCache();

	ReadReturn r1;
	r1.value = 10.0;
	r1.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

	ReadReturn r2;
	r2.value = 11.0;
	r2.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

	// Method under test will read through each fan sensor for the zone and
	// cache the values.
	zone->updateFanTelemetry();

	EXPECT_EQ(r1.value, zone->getCachedValue(name1));
	EXPECT_EQ(r2.value, zone->getCachedValue(name2));
	}

	TEST_F(PidZoneTest, ThermalInput_ValueTimeoutEntersFailSafeMode)
	{
	// On the second updateSensors call, the updated timestamp will be beyond
	// the timeout limit.

	int64_t timeout = 1;

	std::string name1 = "temp1";
	std::unique_ptr<Sensor> sensor1 =
	std::make_unique<SensorMock>(name1, timeout);
	SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

	std::string name2 = "temp2";
	std::unique_ptr<Sensor> sensor2 =
	std::make_unique<SensorMock>(name2, timeout);
	SensorMock* sensor_ptr2 = reinterpret_cast<SensorMock*>(sensor2.get());

	std::string type = "unchecked";
	mgr.addSensor(type, name1, std::move(sensor1));
	EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);
	mgr.addSensor(type, name2, std::move(sensor2));
	EXPECT_EQ(mgr.getSensor(name2), sensor_ptr2);

	zone->addThermalInput(name1);
	zone->addThermalInput(name2);

	// Initialize Zone
	zone->initializeCache();

	// Verify now in failsafe mode.
	EXPECT_TRUE(zone->getFailSafeMode());

	ReadReturn r1;
	r1.value = 10.0;
	r1.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));

	ReadReturn r2;
	r2.value = 11.0;
	r2.updated = std::chrono::high_resolution_clock::now();
	EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

	zone->updateSensors();
	EXPECT_FALSE(zone->getFailSafeMode());

	// Ok, so we're not in failsafe mode, so let's set updated to the past.
	// sensor1 will have an updated field older than its timeout value, but
	// sensor2 will be fine. :D
	r1.updated -= std::chrono::seconds(3);
	r2.updated = std::chrono::high_resolution_clock::now();

	EXPECT_CALL(*sensor_ptr1, read()).WillOnce(Return(r1));
	EXPECT_CALL(*sensor_ptr2, read()).WillOnce(Return(r2));

	// Method under test will read each sensor. One sensor's value is older
	// than the timeout for that sensor and this triggers failsafe mode.
	zone->updateSensors();
	EXPECT_TRUE(zone->getFailSafeMode());
	}

	TEST_F(PidZoneTest, GetSensorTest_ReturnsExpected)
	{
	// One can grab a sensor from the manager through the zone.

	int64_t timeout = 1;

	std::string name1 = "temp1";
	std::unique_ptr<Sensor> sensor1 =
	std::make_unique<SensorMock>(name1, timeout);
	SensorMock* sensor_ptr1 = reinterpret_cast<SensorMock*>(sensor1.get());

	std::string type = "unchecked";
	mgr.addSensor(type, name1, std::move(sensor1));
	EXPECT_EQ(mgr.getSensor(name1), sensor_ptr1);

	zone->addThermalInput(name1);

	// Verify method under test returns the pointer we expect.
	EXPECT_EQ(mgr.getSensor(name1), zone->getSensor(name1));
	}

	TEST_F(PidZoneTest, AddThermalPIDTest_VerifiesThermalPIDsProcessed)
	{
	// Tests adding a thermal PID controller to the zone, and verifies it's
	// touched during processing.

	std::unique_ptr<PIDController> tpid =
	std::make_unique<ControllerMock>("thermal1", zone.get());
	ControllerMock* tmock = reinterpret_cast<ControllerMock*>(tpid.get());

	// Access the internal pid configuration to clear it out (unrelated to the
	// test).
	ec::pid_info_t* info = tpid->getPIDInfo();
	std::memset(info, 0x00, sizeof(ec::pid_info_t));

	zone->addThermalPID(std::move(tpid));

	EXPECT_CALL(*tmock, setptProc()).WillOnce(Return(10.0));
	EXPECT_CALL(*tmock, inputProc()).WillOnce(Return(11.0));
	EXPECT_CALL(*tmock, outputProc(_));

	// Method under test will, for each thermal PID, call setpt, input, and
	// output.
	zone->processThermals();
	}

	TEST_F(PidZoneTest, AddFanPIDTest_VerifiesFanPIDsProcessed)
	{
	// Tests adding a fan PID controller to the zone, and verifies it's
	// touched during processing.

	std::unique_ptr<PIDController> tpid =
	std::make_unique<ControllerMock>("fan1", zone.get());
	ControllerMock* tmock = reinterpret_cast<ControllerMock*>(tpid.get());

	// Access the internal pid configuration to clear it out (unrelated to the
	// test).
	ec::pid_info_t* info = tpid->getPIDInfo();
	std::memset(info, 0x00, sizeof(ec::pid_info_t));

	zone->addFanPID(std::move(tpid));

	EXPECT_CALL(*tmock, setptProc()).WillOnce(Return(10.0));
	EXPECT_CALL(*tmock, inputProc()).WillOnce(Return(11.0));
	EXPECT_CALL(*tmock, outputProc(_));

	// Method under test will, for each fan PID, call setpt, input, and output.
	zone->processFans();
	}

	TEST_F(PidZoneTest, ManualModeDbusTest_VerifySetManualBehavesAsExpected)
	{
	// The manual(bool) method is inherited from the dbus mode interface.

	// Verifies that someone doesn't remove the internal call to the dbus
	// object from which we're inheriting.
	EXPECT_CALL(sdbus_mock_mode,
	sd_bus_emit_properties_changed_strv(
	IsNull(), StrEq(objPath), StrEq(modeInterface), NotNull()))
	.WillOnce(Invoke([&](sd_bus* bus, const char* path,
	const char* interface, char** names) {
	EXPECT_STREQ("Manual", names[0]);
	return 0;
	}));

	// Method under test will set the manual mode to true and broadcast this
	// change on dbus.
	zone->manual(true);
	EXPECT_TRUE(zone->getManualMode());
	}

	TEST_F(PidZoneTest, FailsafeDbusTest_VerifiesReturnsExpected)
	{
	// This property is implemented by us as read-only, such that trying to
	// write to it will have no effect.
	EXPECT_EQ(zone->failSafe(), zone->getFailSafeMode());
	}