test_sps.c

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/**
 * @file    test_sps.c
 * @author  foxBMS Team
 * @date    2020-10-28 (date of creation)
 * @updated 2023-10-12 (date of last update)
 * @version v1.6.0
 * @ingroup UNIT_TEST_IMPLEMENTATION
 * @prefix  TEST
 *
 * @brief   Tests for the SPS driver
 *
 */
 
/*========== Includes =======================================================*/
#include "unity.h"
#include "Mockcontactor.h"
#include "Mockcontactor_cfg.h"
#include "Mockdatabase.h"
#include "Mockio.h"
#include "Mockmcu.h"
#include "Mockos.h"
#include "Mockpex.h"
#include "Mockpex_cfg.h"
#include "Mockspi.h"
#include "Mockspi_cfg.h"
#include "Mocksps_cfg.h"
#include "Mocksps_types.h"
 
#include "sps.h"
#include "test_assert_helper.h"
 
#include <stdbool.h>
 
/*========== Unit Testing Framework Directives ==============================*/
TEST_INCLUDE_PATH("../../src/app/driver/config")
TEST_INCLUDE_PATH("../../src/app/driver/contactor")
TEST_INCLUDE_PATH("../../src/app/driver/io")
TEST_INCLUDE_PATH("../../src/app/driver/pex")
TEST_INCLUDE_PATH("../../src/app/driver/spi")
TEST_INCLUDE_PATH("../../src/app/driver/sps")
 
/*========== Definitions and Implementations for Unit Test ==================*/
/** SPI data configuration struct for SPS communication */
static spiDAT1_t spi_kSpsDataConfig = {
    /* struct is implemented in the TI HAL and uses uppercase true and false */
    .CS_HOLD = FALSE,     /*!< The HW chip select signal is deactivated */
    .WDEL    = TRUE,      /*!< No delay will be inserted */
    .DFSEL   = SPI_FMT_0, /*!< Data word format select: data format 0 (SPI3) */
    .CSNR    = 0x0,       /*!< Chip select (CS) number; 0x01h for CS[0] */
};
 
/** SPI interface configuration for SPS communication */
SPI_INTERFACE_CONFIG_s spi_spsInterface = {
    .pConfig  = &spi_kSpsDataConfig,
    .pNode    = spiREG3,
    .pGioPort = &(spiREG3->PC3),
    .csPin    = 2u,
};
 
/** channel states */
SPS_CHANNEL_STATE_s sps_channelStatus[SPS_NR_OF_AVAILABLE_SPS_CHANNELS] = {
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_CONTACTOR, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_CONTACTOR, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_CONTACTOR, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_CONTACTOR, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_CONTACTOR, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_GENERAL_IO, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_GENERAL_IO, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
    {SPS_CHANNEL_OFF, SPS_CHANNEL_OFF, 0.0f, SPS_AFF_GENERAL_IO, SPS_CHANNEL_ON_DEFAULT_THRESHOLD_mA},
};
 
const SPS_CHANNEL_FEEDBACK_MAPPING_s sps_kChannelFeedbackMapping[SPS_NR_OF_AVAILABLE_SPS_CHANNELS] = {
    {PEX_PORT_EXPANDER1, PEX_PIN00},
    {PEX_PORT_EXPANDER1, PEX_PIN01},
    {PEX_PORT_EXPANDER1, PEX_PIN02},
    {PEX_PORT_EXPANDER1, PEX_PIN03},
    {PEX_PORT_EXPANDER1, PEX_PIN04},
    {PEX_PORT_EXPANDER1, PEX_PIN05},
    {PEX_PORT_EXPANDER1, PEX_PIN06},
    {PEX_PORT_EXPANDER1, PEX_PIN07},
};
 
/*========== Setup and Teardown =============================================*/
void setUp(void) {
    /* make sure variables are in a known state */
 
    for (uint8_t channel = 0u; channel < SPS_NR_OF_AVAILABLE_SPS_CHANNELS; channel++) {
        sps_channelStatus[channel].channelRequested = SPS_CHANNEL_OFF;
        sps_channelStatus[channel].channel          = SPS_CHANNEL_OFF;
        sps_channelStatus[channel].current_mA       = 0.0f;
    }
}
 
void tearDown(void) {
}
 
/*========== Test Cases =====================================================*/
void testSPS_RequestChannelStateInvalidIndex(void) {
    TEST_ASSERT_FAIL_ASSERT(TEST_SPS_RequestChannelState(SPS_NR_OF_AVAILABLE_SPS_CHANNELS + 1u, SPS_CHANNEL_OFF));
}
 
void testSPS_RequestChannelStateInvalidFunction(void) {
    TEST_ASSERT_FAIL_ASSERT(TEST_SPS_RequestChannelState(0u, 42u));
}
 
void testSPS_RequestChannelStateSwitchOn(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(0u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(0u, SPS_CHANNEL_OFF));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channelRequested);
}
 
void testSPS_GetChannelFeedbackInvalidChannelIndex(void) {
    TEST_ASSERT_FAIL_ASSERT(SPS_GetChannelCurrentFeedback(42u));
}
 
void testSPS_GetChannelFeedbackChannelLow(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
 
    sps_channelStatus[0].current_mA = 0;
 
    TEST_ASSERT_EQUAL(CONT_SWITCH_OFF, SPS_GetChannelCurrentFeedback(0u));
}
 
void testSPS_GetChannelFeedbackChannelHigh(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
 
    sps_channelStatus[0].current_mA = 600.f;
 
    TEST_ASSERT_EQUAL(CONT_SWITCH_ON, SPS_GetChannelCurrentFeedback(0u));
}
 
void testSPS_GetChannelAffiliationInvalidIndex(void) {
    TEST_ASSERT_FAIL_ASSERT(SPS_GetChannelAffiliation((SPS_CHANNEL_INDEX)42u));
}
 
void testSPS_GetChannelAffiliationValidIndex(void) {
    for (SPS_CHANNEL_INDEX index = 0u; index < SPS_NR_OF_AVAILABLE_SPS_CHANNELS; index++) {
        TEST_ASSERT_EQUAL(sps_channelStatus[index].affiliation, SPS_GetChannelAffiliation(index));
    }
}
 
void testSPS_RequestContactorStateWrongAffiliation(void) {
    /* watch out, the channel here has to have an affiliation that is not SPS_AFF_CONTACTOR */
    TEST_ASSERT_FAIL_ASSERT(SPS_RequestContactorState(11u, SPS_CHANNEL_OFF));
}
 
void testSPS_RequestContactorStateWrongIndex(void) {
    /* a wrong index should also lead here to an assertion */
    TEST_ASSERT_FAIL_ASSERT(SPS_RequestContactorState(42u, SPS_CHANNEL_OFF));
}
 
void testSPS_RequestContactorStateCorrectAffiliation(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
    /* watch out, the channel here has to have an affiliation that is SPS_AFF_CONTACTOR */
    TEST_ASSERT_PASS_ASSERT(SPS_RequestContactorState(0u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channelRequested);
}
 
void testSPS_RequestGeneralIOStateWrongAffiliation(void) {
    /* watch out, the channel here has to have an affiliation that is not SPS_AFF_GENERAL_IO */
    TEST_ASSERT_FAIL_ASSERT(SPS_RequestGeneralIoState(0u, SPS_CHANNEL_OFF));
}
 
void testSPS_RequestGeneralIOStateWrongIndex(void) {
    /* a wrong index should also lead here to an assertion */
    TEST_ASSERT_FAIL_ASSERT(SPS_RequestGeneralIoState(42u, SPS_CHANNEL_OFF));
}
 
void testSPS_RequestGIOStateCorrectAffiliation(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
    /* watch out, the channel here has to have an affiliation that is SPS_AFF_GENERAL_IO */
    TEST_ASSERT_PASS_ASSERT(SPS_RequestGeneralIoState(7u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[7u].channelRequested);
}
 
void testSPS_CtrlStartupProcedure(void) {
    /* default wait time */
    const uint8_t defaultTimer = 5u;
 
    /* check that we init in SPS_START otherwise this test has to be adapted */
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
    TEST_ASSERT_EQUAL(0u, TEST_SPS_GetSpsTimer());
 
    /* transition through state-machine: SPS_START */
    /* interface should become switched to low speed */
    SPI_SpsInterfaceSwitchToLowSpeed_Expect(&spi_spsInterface);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_RESET_LOW, TEST_SPS_GetSpsState());
 
    /* transition through state-machine: SPS_RESET_LOW */
    /* check that reset pin is reset
       (we don't care for the actual address as long as the pin is correct) */
    IO_PinReset_Expect(0u, SPS_RESET_PIN);
    IO_PinReset_IgnoreArg_pRegisterAddress();
    SPS_Ctrl();
    /* timer should now be set to 5 */
    TEST_ASSERT_EQUAL(defaultTimer, TEST_SPS_GetSpsTimer());
    /* state should now be SPS_RESET_HIGH */
    TEST_ASSERT_EQUAL(SPS_RESET_HIGH, TEST_SPS_GetSpsState());
    /* test that timer decreases and nothing else happens */
    SPS_Ctrl();
    TEST_ASSERT_EQUAL((defaultTimer - 1u), TEST_SPS_GetSpsTimer());
    TEST_ASSERT_EQUAL(SPS_RESET_HIGH, TEST_SPS_GetSpsState());
    /* now that we know that it works: overwrite the timer so that
       the next step can proceed */
    TEST_SPS_SetSpsTimer(0u);
 
    /* transition through state-machine: SPS_RESET_HIGH */
    /* check that reset pin is set
       (we don't care for the actual address as long as the pin is correct) */
    IO_PinSet_Expect(0u, SPS_RESET_PIN);
    IO_PinSet_IgnoreArg_pRegisterAddress();
    SPS_Ctrl();
    /* timer should now be set to 5 */
    TEST_ASSERT_EQUAL(defaultTimer, TEST_SPS_GetSpsTimer());
    /* state should now be SPS_CONFIGURE_CONTROL_REGISTER */
    TEST_ASSERT_EQUAL(SPS_CONFIGURE_CONTROL_REGISTER, TEST_SPS_GetSpsState());
    /* reset the timer so that we can continue */
    TEST_SPS_SetSpsTimer(0u);
 
    /* transition through state-machine: SPS_CONFIGURE_CONTROL_REGISTER */
    /* check that we transmit the first set of commands */
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_OK);
    MCU_Delay_us_Ignore();
    /* Since the transaction is successful, we should switch to high-speed */
    SPI_SpsInterfaceSwitchToHighSpeed_Expect(&spi_spsInterface);
    SPS_Ctrl();
    /* state should be now SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_ASSERT_EQUAL(SPS_TRIGGER_CURRENT_MEASUREMENT, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetOnFailedFirstTransaction(void) {
    /* go to state SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
 
    /* run state and let first transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_ExpectAndReturn(NULL_PTR, NULL_PTR, NULL_PTR, 0u, STD_NOT_OK);
    SPI_TransmitReceiveData_IgnoreArg_pSpiInterface();
    SPI_TransmitReceiveData_IgnoreArg_pTxBuff();
    SPI_TransmitReceiveData_IgnoreArg_pRxBuff();
    SPI_TransmitReceiveData_IgnoreArg_frameLength();
    SPI_TransmitReceiveData_ExpectAndReturn(NULL_PTR, NULL_PTR, NULL_PTR, 0u, STD_OK);
    SPI_TransmitReceiveData_IgnoreArg_pSpiInterface();
    SPI_TransmitReceiveData_IgnoreArg_pTxBuff();
    SPI_TransmitReceiveData_IgnoreArg_pRxBuff();
    SPI_TransmitReceiveData_IgnoreArg_frameLength();
    SPS_Ctrl();
}
 
void testSPS_CtrlResetOnFailedSecondTransaction(void) {
    /* go to state SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
 
    /* run state and let second transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_ExpectAndReturn(NULL_PTR, NULL_PTR, NULL_PTR, 0u, STD_OK);
    SPI_TransmitReceiveData_IgnoreArg_pSpiInterface();
    SPI_TransmitReceiveData_IgnoreArg_pTxBuff();
    SPI_TransmitReceiveData_IgnoreArg_pRxBuff();
    SPI_TransmitReceiveData_IgnoreArg_frameLength();
    SPI_TransmitReceiveData_ExpectAndReturn(NULL_PTR, NULL_PTR, NULL_PTR, 0u, STD_NOT_OK);
    SPI_TransmitReceiveData_IgnoreArg_pSpiInterface();
    SPI_TransmitReceiveData_IgnoreArg_pTxBuff();
    SPI_TransmitReceiveData_IgnoreArg_pRxBuff();
    SPI_TransmitReceiveData_IgnoreArg_frameLength();
    SPS_Ctrl();
}
 
void testSPS_CtrlResetOnFailedBothTransactions(void) {
    /* go to state SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
}
 
void testSPS_CtrlResetFromStateSPS_CONFIGURE_CONTROL_REGISTER(void) {
    /* go to state SPS_CONFIGURE_CONTROL_REGISTER */
    TEST_SPS_SetSpsState(SPS_CONFIGURE_CONTROL_REGISTER);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_TRIGGER_CURRENT_MEASUREMENT(void) {
    /* go to state SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_READ_EN_IRQ_PIN(void) {
    /* go to state SPS_READ_EN_IRQ_PIN */
    TEST_SPS_SetSpsState(SPS_READ_EN_IRQ_PIN);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_READ_MEASURED_CURRENT1(void) {
    /* go to state SPS_READ_MEASURED_CURRENT1 */
    TEST_SPS_SetSpsState(SPS_READ_MEASURED_CURRENT1);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_READ_MEASURED_CURRENT2(void) {
    /* go to state SPS_READ_MEASURED_CURRENT2 */
    TEST_SPS_SetSpsState(SPS_READ_MEASURED_CURRENT2);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_READ_MEASURED_CURRENT3(void) {
    /* go to state SPS_READ_MEASURED_CURRENT3 */
    TEST_SPS_SetSpsState(SPS_READ_MEASURED_CURRENT3);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlResetFromStateSPS_READ_MEASURED_CURRENT4(void) {
    /* go to state SPS_READ_MEASURED_CURRENT4 */
    TEST_SPS_SetSpsState(SPS_READ_MEASURED_CURRENT4);
 
    /* run state and let both transaction "fail" */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_NOT_OK);
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_START, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlNormalOperationCycle(void) {
    /* go to state SPS_TRIGGER_CURRENT_MEASUREMENT */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
 
    /* let transactions always succeed */
    MCU_Delay_us_Ignore();
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_OK);
 
    /* run state chain */
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_READ_EN_IRQ_PIN, TEST_SPS_GetSpsState());
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_READ_MEASURED_CURRENT1, TEST_SPS_GetSpsState());
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_READ_MEASURED_CURRENT2, TEST_SPS_GetSpsState());
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_READ_MEASURED_CURRENT3, TEST_SPS_GetSpsState());
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_READ_MEASURED_CURRENT4, TEST_SPS_GetSpsState());
    SPS_Ctrl();
    TEST_ASSERT_EQUAL(SPS_TRIGGER_CURRENT_MEASUREMENT, TEST_SPS_GetSpsState());
}
 
void testSPS_CtrlAssertOnIllegalState(void) {
    /* go to illegal state 128 */
    TEST_SPS_SetSpsState(128u);
 
    TEST_ASSERT_FAIL_ASSERT(SPS_Ctrl());
}
 
void testContactorSwitchOnAndOff(void) {
    OS_EnterTaskCritical_Ignore();
    OS_ExitTaskCritical_Ignore();
 
    /* switch on a first, second, third and fourth channel */
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(0u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[1u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(1u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[1u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[1u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[6u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(6u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[6u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[6u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[7u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(7u, SPS_CHANNEL_ON));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[7u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[7u].channel);
 
    /* cycle over one state that handles channels */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_OK);
    MCU_Delay_us_Ignore();
    SPS_Ctrl();
 
    /* check that channels have been marked as on */
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[1u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[6u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[7u].channel);
 
    /* switch off a first, second, third and fourth channel */
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(0u, SPS_CHANNEL_OFF));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[0u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[1u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(1u, SPS_CHANNEL_OFF));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[1u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[1u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[6u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(6u, SPS_CHANNEL_OFF));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[6u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[6u].channel);
 
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[7u].channelRequested);
    TEST_ASSERT_PASS_ASSERT(TEST_SPS_RequestChannelState(7u, SPS_CHANNEL_OFF));
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[7u].channelRequested);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_ON, sps_channelStatus[7u].channel);
 
    /* cycle over one state that handles channels */
    TEST_SPS_SetSpsState(SPS_TRIGGER_CURRENT_MEASUREMENT);
    SPI_TransmitReceiveData_IgnoreAndReturn(STD_OK);
    MCU_Delay_us_Ignore();
    SPS_Ctrl();
 
    /* check that channels have been marked as off */
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[0u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[1u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[6u].channel);
    TEST_ASSERT_EQUAL(SPS_CHANNEL_OFF, sps_channelStatus[7u].channel);
}
 
/** test the states of PEX feedback function */
void testSPS_GetChannelPexFeedback(void) {
    /* report pin state 0 with normally open --> should report switch off */
    PEX_GetPin_ExpectAndReturn(PEX_PORT_EXPANDER1, PEX_PIN00, 0u);
    TEST_ASSERT_EQUAL(CONT_SWITCH_OFF, SPS_GetChannelPexFeedback(0u, true));
 
    /* report pin state 1 with normally open --> should report switch on */
    PEX_GetPin_ExpectAndReturn(PEX_PORT_EXPANDER1, PEX_PIN00, 1u);
    TEST_ASSERT_EQUAL(CONT_SWITCH_ON, SPS_GetChannelPexFeedback(0u, true));
 
    /* report pin state 0 with normally closed --> should report switch on */
    PEX_GetPin_ExpectAndReturn(PEX_PORT_EXPANDER1, PEX_PIN00, 0u);
    TEST_ASSERT_EQUAL(CONT_SWITCH_ON, SPS_GetChannelPexFeedback(0u, false));
 
    /* report pin state 1 with normally closed --> should report switch off */
    PEX_GetPin_ExpectAndReturn(PEX_PORT_EXPANDER1, PEX_PIN00, 1u);
    TEST_ASSERT_EQUAL(CONT_SWITCH_OFF, SPS_GetChannelPexFeedback(0u, false));
}