Add unittests for trapping

# SPDX-FileCopyrightText: 2017-2022 CERN and the Allpix Squared authors

# SPDX-License-Identifier: MIT

#DESC tests the fallback of infinite charge carrier lifetime in case no trapping model is chosen

[Allpix]

detectors_file = "detector.conf"

number_of_events = 1

random_seed = 0

[DepositionPointCharge]

model = "fixed"

source_type = "point"

position = 445um 220um 0um

number_of_charges = 2000

[ElectricFieldReader]

model = "linear"

bias_voltage = 100V

depletion_voltage = 150V

[GenericPropagation]

log_level = INFO

temperature = 293K

charge_per_step = 1

propagate_electrons = false

propagate_holes = true

#PASS No charge carrier trapping model chosen, no trapping simulated

# SPDX-FileCopyrightText: 2017-2022 CERN and the Allpix Squared authors

# SPDX-License-Identifier: MIT

#DESC tests if non-existing trapping models selected in the configuration file are detected

[Allpix]

detectors_file = "detector.conf"

number_of_events = 1

random_seed = 0

[DepositionPointCharge]

model = "fixed"

source_type = "point"

position = 445um 220um 0um

number_of_charges = 2000

[ElectricFieldReader]

model = "linear"

bias_voltage = 100V

depletion_voltage = 150V

[GenericPropagation]

log_level = INFO

temperature = 293K

charge_per_step = 1

propagate_electrons = false

propagate_holes = true

trapping_model = "nonexistent"

#PASS (FATAL) [I:GenericPropagation:mydetector] Error in the configuration:\nValue "nonexistent" of key 'trapping_model' in section 'GenericPropagation' is not valid: Model with name "nonexistent" does not exist

# SPDX-FileCopyrightText: 2017-2022 CERN and the Allpix Squared authors

# SPDX-License-Identifier: MIT

#DESC tests if non-existing trapping models selected in the configuration file are detected

[Allpix]

detectors_file = "detector.conf"

number_of_events = 1

random_seed = 0

[DepositionPointCharge]

model = "fixed"

source_type = "point"

position = 445um 220um 0um

number_of_charges = 2000

[ElectricFieldReader]

model = "linear"

bias_voltage = 100V

depletion_voltage = 150V

[GenericPropagation]

log_level = INFO

temperature = 293K

charge_per_step = 1

propagate_electrons = false

propagate_holes = true

trapping_model = "custom"

trapping_function_electrons = "[0]"

trapping_parameters_electrons = 10ns

trapping_function_holes = "[0]"

trapping_parameters_holes = 10ns

#PASS Trapped 1385 charges during transport