The solution @peerreynders proposed in the similar question I had was to do something like this…
def hello(n) do
if n == 10 do
hello_success()
else
hello_error()
end
end
This way You can detect type error in the smaller functions.
Here is the solution he provided in my question…
cond do
qty < 0 ->
create_unit_quantity_error("unit_quantity can not be negative")
qty > 1_000 ->
create_unit_quantity_error("unit_quantity can not be more than 1000")
true ->
create_unit_quantity_success(qty)
end
