invest/tests/test_datastack_modules/ui_parameter_archive.py

from natcap.invest import spec

MODEL_SPEC = SimpleNamespace(inputs=[
    spec.StringInput(id='foo'),
    spec.StringInput(id='bar')],
    outputs={},
    model_id='ui_parameters_model',
    model_title='',
    userguide='',
    input_field_order=[]
)