Test $2$: Functions Return a List of the Correct Length

In a file named test$2.$py$,$ write a test function named test$\_$return$\_$list$\_$correct$\_$lenght to test that

each of the six functions in the load data module returns a list of the correct length.

Example:

add$\_$average$([])$ should return a list of length zero.load$\_$data$("$student$-$test.csv$",("$School$","$A$"))$ should return a list of length

zero.

student$\_$age$\_$list$("$student$-$test.csv$",18)$ should return a list of length four.

For each function except load$\_$data you need to provide at least $3$ test cases covering different

scenarios: $5$ functions $*3$ test$/$function $=15$ test cases

For function load$\_$data, you need to provide at least $6$ test cases covering different scenarios.

That is $21$ test cases in total.