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-rw-r--r--ocaml/test/year2025/day01/part02/test_dial.ml42
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diff --git a/ocaml/test/year2025/day01/part02/test_dial.ml b/ocaml/test/year2025/day01/part02/test_dial.ml
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+++ b/ocaml/test/year2025/day01/part02/test_dial.ml
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+open Year2025.Day01.Part02.Dial
+open Year2025.Day01.Part02.Turner
+
+let test_start () =
+ Alcotest.(check int) "incorrect starting state" 50 (Dial.to_int Dial.start)
+
+let test_turn errmsg exp dir =
+ Alcotest.(check int)
+ errmsg exp
+ (Dial.to_int (fst (Turner.turn Dial.start 0 dir)))
+
+let test_turn_left_one () =
+ test_turn "incorrect result when turning left one step" 49 (Dial.Left 1)
+
+let test_turn_left_100 () =
+ test_turn "incorrect result when turning left 100 steps" 50 (Dial.Left 100)
+
+let test_turn_right_one () =
+ test_turn "incorrect result when turning right one step" 51 (Dial.Right 1)
+
+let test_turn_right_100 () =
+ test_turn "incorrect result when turning right 100 steps" 50 (Dial.Right 100)
+
+let test_zero_count errmsg exp dir =
+ Alcotest.(check int) errmsg exp (snd (Turner.turn Dial.start 0 dir))
+
+let test_zero_count_right_1000 () =
+ test_zero_count "zero MUST be counted each time it is passed" 10
+ (Dial.Right 1000)
+
+let () =
+ let open Alcotest in
+ run "D01p02"
+ [ ("initial-state", [test_case "starting state" `Quick test_start])
+ ; ( "turning-dial-regression"
+ , [ test_case "turning left one step" `Quick test_turn_left_one
+ ; test_case "turning right one step" `Quick test_turn_right_one
+ ; test_case "turning left 100 steps" `Quick test_turn_left_100
+ ; test_case "turning right 100 steps" `Quick test_turn_right_100 ] )
+ ; ( "zero-count"
+ , [ test_case "zero count after turning right 1000 steps" `Quick
+ test_zero_count_right_1000 ] ) ]