GCC Code Coverage Report

Directory: ./
File: unit_tests/tests/ignition_injection/test_injector_model.cpp
Date: 2025-10-24 14:26:41
Coverage Exec Excl Total
Lines: 98.9% 259 0 262
Functions: 95.7% 67 0 70
Branches: 60.4% 344 0 570
Decisions: 100.0% 2 - 2
Line Branch Decision Exec Source
1 #include "pch.h"
2 #include "injector_model.h"
3
4 using ::testing::_;
5 using ::testing::StrictMock;
6
7 class MockInjectorModel : public InjectorModelBase {
8 public:
9 8 MOCK_METHOD(floatms_t, getDeadtime, (), (const, override));
10 8 MOCK_METHOD(float, getBaseFlowRate, (), (const, override));
11 8 MOCK_METHOD(float, getInjectorFlowRatio, (), (override));
12 ✗ MOCK_METHOD(void, updateState, (), (override));
13 ✗ MOCK_METHOD(expected<float>, getFuelDifferentialPressure, (), (const, override));
14 ✗ MOCK_METHOD(expected<float>, getFuelPressure, (), (const, override));
15 2 MOCK_METHOD(float, getSmallPulseFlowRate, (), (const, override));
16 2 MOCK_METHOD(float, getSmallPulseBreakPoint, (), (const, override));
17 33 MOCK_METHOD(InjectorNonlinearMode, getNonlinearMode, (), (const, override));
18 };
19
20 4 TEST(InjectorModel, Prepare) {
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 1 StrictMock<MockInjectorModel> dut;
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 1 EXPECT_CALL(dut, getDeadtime());
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 1 EXPECT_CALL(dut, getBaseFlowRate());
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 1 EXPECT_CALL(dut, getNonlinearMode());
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 1 EXPECT_CALL(dut, getInjectorFlowRatio());
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 1 dut.prepare();
29 2 }
30
31 4 TEST(InjectorModel, getInjectionDuration) {
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 1 StrictMock<MockInjectorModel> dut;
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 3 EXPECT_CALL(dut, getDeadtime())
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 3 .WillOnce(Return(2.0f));
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 3 EXPECT_CALL(dut, getInjectorFlowRatio())
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 3 .WillOnce(Return(1.0f));
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 3 EXPECT_CALL(dut, getBaseFlowRate())
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 3 .WillOnce(Return(4.8f)); // 400cc/min
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 3 EXPECT_CALL(dut, getNonlinearMode())
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 3 .WillRepeatedly(Return(INJ_None));
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 1 dut.prepare();
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.01f), 10 / 4.8f + 2.0f, EPS4D);
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.02f), 20 / 4.8f + 2.0f, EPS4D);
47 2 }
48
49 4 TEST(InjectorModel, getInjectionDurationWithFlowRatio) {
50
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 1 StrictMock<MockInjectorModel> dut;
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 3 EXPECT_CALL(dut, getDeadtime())
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 3 .WillOnce(Return(2.0f));
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 3 EXPECT_CALL(dut, getInjectorFlowRatio())
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 3 .WillOnce(Return(1.1f));
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 3 EXPECT_CALL(dut, getBaseFlowRate())
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 3 .WillOnce(Return(4.8f)); // 400cc/min
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 3 EXPECT_CALL(dut, getNonlinearMode())
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 3 .WillRepeatedly(Return(INJ_None));
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 1 dut.prepare();
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.01f), 10 / (4.8f * 1.1f) + 2.0f, EPS4D);
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.02f), 20 / (4.8f * 1.1f) + 2.0f, EPS4D);
65 2 }
66
67 4 TEST(InjectorModel, getInjectionDurationWithHPFPManualCompensation) {
68 #if (VBAT_INJECTOR_CURVE_PRESSURE_SIZE == 2) && (VBAT_INJECTOR_CURVE_SIZE == 8)
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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 1 InjectorModelPrimary dut;
71 static const auto HPFPMockedMassCompensation = 2;
72
73 1 setTable(config->hpfpFuelMassCompensation, HPFPMockedMassCompensation);
74 1 engineConfiguration->injectorCompensationMode = ICM_HPFP_Manual_Compensation;
75
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 1 dut.prepare();
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.01f), (10 * HPFPMockedMassCompensation) / (4.8f * 1.1 ) + 2.0f, EPS0D);
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 1 EXPECT_NEAR(dut.getInjectionDuration(0.02f), (20 * HPFPMockedMassCompensation) / (4.8f * 1.1 ) + 2.0f, EPS0D);
80 #endif // (VBAT_INJECTOR_CURVE_PRESSURE_SIZE == 2) && (VBAT_INJECTOR_CURVE_SIZE == 8)
81 2 }
82
83 4 TEST(InjectorModel, nonLinearFordMode) {
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 1 StrictMock<MockInjectorModel> dut;
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 3 EXPECT_CALL(dut, getDeadtime())
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 3 .WillOnce(Return(0));
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 3 EXPECT_CALL(dut, getInjectorFlowRatio())
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 3 .WillOnce(Return(1.0f));
90
91 // 2005 F150 injectors
92
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 3 EXPECT_CALL(dut, getBaseFlowRate())
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 3 .WillRepeatedly(Return(2.979f));
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 3 EXPECT_CALL(dut, getSmallPulseFlowRate())
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 3 .WillRepeatedly(Return(3.562f));
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 3 EXPECT_CALL(dut, getSmallPulseBreakPoint())
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 3 .WillRepeatedly(Return(0.00627f));
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 3 EXPECT_CALL(dut, getNonlinearMode())
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 3 .WillRepeatedly(Return(INJ_FordModel));
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 1 dut.prepare();
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.000f), 0.344f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.001f), 0.625f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.002f), 0.906f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.003f), 1.187f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.004f), 1.467f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.005f), 1.748f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.006f), 2.029f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.007f), 2.350f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.008f), 2.685f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.009f), 3.021f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.010f), 3.357f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.011f), 3.693f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.012f), 4.028f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.013f), 4.364f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.014f), 4.700f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.015f), 5.035f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.016f), 5.371f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.017f), 5.707f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.018f), 6.042f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.019f), 6.378f, 1e-3);
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 1 EXPECT_NEAR(dut.getBaseDurationImpl(0.020f), 6.714f, 1e-3);
124 2 }
125
126 4 TEST(InjectorModel, nonlinearPolynomial) {
127
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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 1 InjectorModelPrimary dut;
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130 1 engineConfiguration->applyNonlinearBelowPulse = 10;
131
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 9 for (int i = 0; i < 8; i++) {
133 8 engineConfiguration->injectorCorrectionPolynomial[i] = i + 1;
134 }
135
136 // expect return of the original value, plus polynomial f(x)
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(-3), -3 + -13532, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(-2), -2 + -711, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(-1), -1 + -4, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(0), 0 + 1, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(1), 1 + 36, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(2), 2 + 1793, EPS4D);
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 1 EXPECT_NEAR(dut.correctInjectionPolynomial(3), 3 + 24604, EPS4D);
144
145 // Check that the disable threshold works
146
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 1 EXPECT_NE(dut.correctInjectionPolynomial(9.9f), 9.9f);
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 1 EXPECT_EQ(dut.correctInjectionPolynomial(10.1f), 10.1f);
148 2 }
149
150
151 #if (VBAT_INJECTOR_CURVE_PRESSURE_SIZE == 2) && (VBAT_INJECTOR_CURVE_SIZE == 8)
152 4 TEST(InjectorModel, Deadtime) {
153
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
154
155 // Some test data in the injector correction table
156 static const float injectorLagPressureBins[VBAT_INJECTOR_CURVE_PRESSURE_SIZE] = { 300, 600 };
157 static const float injectorLagVbattBins[VBAT_INJECTOR_CURVE_SIZE] = { 6.0, 8.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0 };
158 static const float injectorLagCorrection[VBAT_INJECTOR_CURVE_PRESSURE_SIZE][VBAT_INJECTOR_CURVE_SIZE] = {
159 { 3.371, 1.974, 1.383, 1.194, 1.040, 0.914, 0.767, 0.726 },
160 { 3.371, 1.974, 1.383, 1.194, 1.040, 0.914, 0.767, 0.726 },
161 };
162
163 1 copyArray(engineConfiguration->injector.battLagCorrBattBins, injectorLagVbattBins);
164
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 1 copyArray(engineConfiguration->injector.battLagCorrPressBins, injectorLagPressureBins);
165 1 copyTable(engineConfiguration->injector.battLagCorrTable, injectorLagCorrection);
166
167
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 1 InjectorModelPrimary dut;
168 1 dut.pressureCorrectionReference = 300;
169
170
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 1 Sensor::setMockValue(SensorType::BatteryVoltage, 11);
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 1 EXPECT_NEAR(dut.getDeadtime(), 1.18, EPS2D);
172
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 1 Sensor::setMockValue(SensorType::BatteryVoltage, 15);
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 1 EXPECT_NEAR(dut.getDeadtime(), 0.72, EPS2D);
175 2 }
176 #endif //(VBAT_INJECTOR_CURVE_PRESSURE_SIZE == 2) && (VBAT_INJECTOR_CURVE_SIZE == 8)
177
178 struct TesterGetFlowRate : public InjectorModelPrimary {
179 MOCK_METHOD(float, getInjectorFlowRatio, (), (override));
180 };
181
182 struct TesterGetRailPressure : public InjectorModelPrimary {
183 12 MOCK_METHOD(expected<float>, getFuelDifferentialPressure, (), (const, override));
184 };
185
186 class FlowRateFixture : public ::testing::TestWithParam<float> {
187 };
188
189
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gtest_InjectorModelFlowRateFixture_EvalGenerateName_(testing::TestParamInfo<float> const&):
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gtest_InjectorModelFlowRateFixture_EvalGenerator_():
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 7 INSTANTIATE_TEST_SUITE_P(
190 InjectorModel,
191 FlowRateFixture,
192 ::testing::Values(0.1f, 0.5f, 1.0f, 2.0f, 10.0f)
193 );
194
195
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 17 TEST_P(FlowRateFixture, PressureRatio) {
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 5 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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 5 float pressureRatio = GetParam();
199 // Flow ratio should be the sqrt of pressure ratio
200 5 float expectedFlowRatio = sqrtf(pressureRatio);
201
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 5 StrictMock<TesterGetRailPressure> dut;
203
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 5 EXPECT_CALL(dut, getFuelDifferentialPressure()).WillOnce(Return(400 * pressureRatio));
204
205 // Use injector compensation
206 5 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
207
208 // Reference pressure is 400kPa
209 5 engineConfiguration->fuelReferencePressure = 400.0f;
210
211 // Should return the expected ratio
212
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 5 EXPECT_FLOAT_EQ(expectedFlowRatio, dut.getInjectorFlowRatio());
213 10 }
214
215 4 TEST(InjectorModel, NegativePressureDelta) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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 1 StrictMock<TesterGetRailPressure> dut;
219
220 // Use injector compensation
221 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
222
223 // Reference pressure is 400kPa
224 1 engineConfiguration->fuelReferencePressure = 400.0f;
225
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 1 EXPECT_CALL(dut, getFuelDifferentialPressure()).WillOnce(Return(-50));
227
228 // Flow ratio defaults to 1.0 in this case
229
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 1 EXPECT_FLOAT_EQ(1.0f, dut.getInjectorFlowRatio());
230 2 }
231
232 4 TEST(InjectorModel, VariableInjectorFlowModeNone) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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 1 StrictMock<TesterGetRailPressure> dut;
236
237 1 engineConfiguration->injectorCompensationMode = ICM_None;
238
239 // This shoudn't call getFuelDifferentialPressure, it should just return 1.0
240
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 1 EXPECT_FLOAT_EQ(1, dut.getInjectorFlowRatio());
241 2 }
242
243 4 TEST(InjectorModel, HPFPManualCompensation) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
245
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 1 InjectorModelPrimary dut;
247
248 // Use injector compensation
249 1 engineConfiguration->injectorCompensationMode = ICM_HPFP_Manual_Compensation;
250
251 // Reference pressure is 400kPa
252 1 engineConfiguration->fuelReferencePressure = 400.0f;
253
254 // Flow ratio defaults to 1.0 in this case
255
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 1 EXPECT_FLOAT_EQ(1.0f, dut.getInjectorFlowRatio());
256 2 }
257
258 4 TEST(InjectorModel, RailPressureFixed) {
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 1 InjectorModelPrimary dut;
262
263 // Reference pressure is 350kpa
264 1 engineConfiguration->fuelReferencePressure = 350;
265 1 engineConfiguration->injectorCompensationMode = ICM_FixedRailPressure;
266
267 // MAP is 75kPa
268
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 1 Sensor::setMockValue(SensorType::Map, 75);
269
270 // Baro is 100kpa
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 1 Sensor::setMockValue(SensorType::BarometricPressure, 100);
272
273 // Should be reference pressure + 1 atm - 75kpa -> 375kPa
274
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 1 EXPECT_FLOAT_EQ(375.0f, dut.getFuelDifferentialPressure().value_or(0));
275 2 }
276
277 4 TEST(InjectorModel, RailPressureSensedAbsolute) {
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279
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 1 InjectorModelPrimary dut;
281
282 // Reference pressure is 350kpa
283 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
284 1 engineConfiguration->fuelPressureSensorMode = FPM_Absolute;
285
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 1 Sensor::setMockValue(SensorType::Map, 50);
287
288 // Should just return rail sensor value - MAP
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 100);
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 1 EXPECT_FLOAT_EQ(100 - 50, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 200);
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 1 EXPECT_FLOAT_EQ(200 - 50, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 300);
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 1 EXPECT_FLOAT_EQ(300 - 50, dut.getFuelDifferentialPressure().value_or(-1));
295 2 }
296
297 4 TEST(InjectorModel, RailPressureSensedGauge) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
299
300
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 1 InjectorModelPrimary dut;
301
302 // Reference pressure is 350kpa
303 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
304 1 engineConfiguration->fuelPressureSensorMode = FPM_Gauge;
305
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 1 Sensor::setMockValue(SensorType::BarometricPressure, 110);
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 1 Sensor::setMockValue(SensorType::Map, 50);
308
309 // Should just return rail sensor value + baro - MAP
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 100);
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 1 EXPECT_FLOAT_EQ(100 + 110 - 50, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 200);
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 1 EXPECT_FLOAT_EQ(200 + 110 - 50, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 300);
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 1 EXPECT_FLOAT_EQ(300 + 110 - 50, dut.getFuelDifferentialPressure().value_or(-1));
316 2 }
317
318 4 TEST(InjectorModel, RailPressureSensedDifferential) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
320
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 1 InjectorModelPrimary dut;
322
323 // Reference pressure is 350kpa
324 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
325 1 engineConfiguration->fuelPressureSensorMode = FPM_Differential;
326
327 // Should just return rail sensor value
328
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 100);
329
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 1 EXPECT_FLOAT_EQ(100, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 200);
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 1 EXPECT_FLOAT_EQ(200, dut.getFuelDifferentialPressure().value_or(-1));
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 1 Sensor::setMockValue(SensorType::FuelPressureInjector, 300);
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 1 EXPECT_FLOAT_EQ(300, dut.getFuelDifferentialPressure().value_or(-1));
334 2 }
335
336 4 TEST(InjectorModel, FailedPressureSensor) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
338
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 1 InjectorModelPrimary dut;
340
341 // Reference pressure is 350kpa
342 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
343
344 // Sensor is broken!
345 // We have to register a broken sensor because the fuel pressure comp system
346 // has different logic for missing sensor
347
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 1 MockSensor ms(SensorType::FuelPressureInjector);
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 1 ms.invalidate();
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 1 ms.Register();
350
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 1 EXPECT_EQ(1.0f, dut.getInjectorFlowRatio());
352 2 }
353
354 4 TEST(InjectorModel, MissingPressureSensor) {
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 1 EngineTestHelper eth(engine_type_e::TEST_ENGINE);
356
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 1 InjectorModelPrimary dut;
358
359 // Reference pressure is 350kpa
360 1 engineConfiguration->injectorCompensationMode = ICM_SensedRailPressure;
361
362 // Sensor is missing!
363
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 1 Sensor::resetMockValue(SensorType::FuelPressureInjector);
364
365
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 1 int warningsBefore = eth.recentWarnings()->getCount();
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 1 dut.getInjectorFlowRatio();
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 1 int warningsAfter = eth.recentWarnings()->getCount();
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 1 ASSERT_EQ(1, warningsAfter - warningsBefore);
369
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 1 EXPECT_EQ(ObdCode::OBD_Fuel_Pressure_Sensor_Missing, getRecentWarnings()->get(0).Code);
370
371 // Missing sensor should trigger a fatal as it's a misconfiguration
372 //EXPECT_FATAL_ERROR(dut.getInjectorFlowRatio());
373 1 }
374
375