def test_OilProps_sample_oil(oil, density, units):
""" compare expected values with values stored in OilProps - make sure
data entered correctly and unit conversion is correct """
o = OilProps(oil)
assert o.get_density(units) == density
assert o.name == oil
def test_initailize_InitMassFromVolume():
data_arrays = mock_append_data_arrays(mass_array, num_elems)
substance = OilProps('oil_conservative')
spill = Spill(Release(10))
spill.volume = num_elems / (substance.get_density('kg/m^3') * 1000)
fcn = InitMassFromVolume()
fcn.initialize(num_elems, spill, data_arrays, substance)
assert_dataarray_shape_size(mass_array, data_arrays, num_elems)
assert np.all(1. == data_arrays['mass'])