Given students' names along with the grade that they are in, create a roster for the school.
In the end, you should be able to:
Note that all our students only have one name. (It's a small town, what do you want?)
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A pairing session with Phil Battos at gSchool http://gschool.it
(* grade-school - 1.0.0 *)
open OUnit2
open Grade_school
let assert_lists_equal exp got _ctx =
let printer = String.concat ";" in
assert_equal exp got ~printer
let tests = [
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
"Adding a student adds them to the sorted roster" >:: (
let school = empty_school |> add "Aimee" 2 in
assert_lists_equal ["Aimee"] (roster school)
);
"Adding more student adds them to the sorted roster" >:: (
let school = empty_school |> add "Blair" 2 |> add "James" 2 |> add "Paul" 2 in
assert_lists_equal ["Blair"; "James"; "Paul"] (roster school)
);
"Adding students to different grades adds them to the same sorted roster" >:: (
let school = empty_school |> add "Chelsea" 3 |> add "Logan" 7 in
assert_lists_equal ["Chelsea"; "Logan"] (roster school)
);
"Roster returns an empty list if there are no students enrolled" >:: (
let school = empty_school in
assert_lists_equal [] (roster school)
);
"Student names with grades are displayed in the same sorted roster" >:: (
let school = empty_school
|> add "Peter" 2
|> add "Anna" 1
|> add "Barb" 1
|> add "Zoe" 2
|> add "Alex" 2
|> add "Jim" 3
|> add "Charlie" 1 in
assert_lists_equal ["Anna"; "Barb"; "Charlie"; "Alex"; "Peter"; "Zoe"; "Jim"] (roster school)
);
"Grade returns the students in that grade in alphabetical order" >:: (
let school = empty_school |> add "Franklin" 5 |> add "Bradley" 5 |> add "Jeff" 1 in
assert_lists_equal ["Bradley"; "Franklin"] (grade 5 school)
);
"Grade returns an empty list if there are no students in that grade" >:: (
let school = empty_school in
assert_lists_equal [] (grade 1 school)
);
(* "an empty school has no children in grade 1" >::
assert_lists_equal [] (grade 1 empty_school);
"an empty school has Emma in grade 1 after she's been added to grade 1" >::(
let s = add "Emma" 1 empty_school in
assert_lists_equal ["Emma"] (grade 1 s)
);
"an empty school does not have Emma in grade 1 after she's been added to grade 2" >::(
let s = add "Emma" 2 empty_school in
assert_lists_equal [] (grade 1 s)
);
"an empty school has Emma, Timmy, Bob and Becky in grade 1 after they've been added to grade 1" >::(
let s = empty_school |> add "Emma" 1 |> add "Timmy" 1 |> add "Bob" 1 |> add "Becky" 1 in
assert_lists_equal ["Becky"; "Bob"; "Emma"; "Timmy"] (grade 1 s |> List.sort compare)
);
"a sorted school has Emma, Timmy, Bob and Becky in grade 1 in sorted order" >::(
let s = empty_school |> add "Emma" 1 |> add "Timmy" 1 |> add "Bob" 1 |> add "Becky" 1 |> sorted in
assert_lists_equal ["Becky"; "Bob"; "Emma"; "Timmy"] (grade 1 s)
); *)
]
let () =
run_test_tt_main ("grade-school tests" >::: tests)
open Base
module Int_map = Map.M(Int)
type school = string list Int_map.t
let empty_school = Map.empty (module Int)
let add (student: string) (grade: int) (my_school: school) : school =
let student_list = Map.find my_school grade in
match student_list with
| None -> Map.add_exn my_school grade [student]
| Some l -> Map.set my_school ~key:grade ~data:(List.sort (student::l) String.compare)
;;
let grade (grade: int) (my_school: school) : string list =
let student_list = Map.find my_school grade in
match student_list with
| None -> []
| Some l -> l
;;
let sorted (my_school: school) : school =
Map.map my_school (fun student_list -> List.sort student_list String.compare)
;;
let roster (my_school: school) : string list =
let key_list = List.sort (Map.keys my_school) Int.compare in
List.fold key_list ~init:[] ~f:(fun acc key -> List.append acc (grade key my_school))
;;
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