add expect test for the sudoku solver

examples/sudoku/sudoku_solve.ml

@@ -282,9 +282,23 @@ let solve_grid (g:Grid.t) : Grid.t option =
   let s = Solver.create g in
   Solver.solve s
 
-let solve_file file =
+module type CHRONO = sig
+  val pp_elapsed : Fmt.formatter -> unit
+end
+
+let chrono ~pp_time : (module CHRONO) =
+  let module M = struct
+    let start = Sys.time()
+    let pp_elapsed out =
+      if pp_time then
+        Fmt.fprintf out " (in %.3fs)" (Sys.time() -. start)
+  end in
+  (module M)
+
+let solve_file ~pp_time file =
+  let open (val chrono ~pp_time) in
   Format.printf "solve grids in file %S@." file;
-  let start = Sys.time() in
+
   let grids =
     CCIO.with_in file CCIO.read_lines_l
     |> CCList.filter_map
@@ -296,13 +310,13 @@ let solve_file file =
            | exception e ->
              errorf "cannot parse sudoku %S: %s@." s (Printexc.to_string e))
   in
-  Format.printf "parsed %d grids (in %.3fs)@." (List.length grids) (Sys.time()-.start);
+  Format.printf "parsed %d grids%t@." (List.length grids) pp_elapsed;
   List.iter
     (fun g ->
        Format.printf "@[<v>@,#########################@,@[<2>solve grid:@ %a@]@]@." Grid.pp g;
-       let start=Sys.time() in
+       let open (val chrono ~pp_time) in
        match solve_grid g with
-       | None -> Format.printf "no solution (in %.3fs)@." (Sys.time()-.start)
+       | None -> Format.printf "no solution%t@." pp_elapsed
        | Some g' when not @@ Grid.is_full g' ->
          errorf "grid %a@ is not full" Grid.pp g'
        | Some g' when not @@ Grid.is_valid g' ->
@@ -310,24 +324,26 @@ let solve_file file =
        | Some g' when not @@ Grid.matches ~pat:g g' ->
          errorf "grid %a@ @[<2>does not match original@ %a@]" Grid.pp g' Grid.pp g
        | Some g' ->
-         Format.printf "@[<v>@[<2>solution (in %.3fs):@ %a@]@,###################@]@."
+         Format.printf "@[<v>@[<2>solution%t:@ %a@]@,###################@]@."
-           (Sys.time()-.start) Grid.pp g')
+           pp_elapsed Grid.pp g')
     grids;
-  Format.printf "@.solved %d grids (in %.3fs)@." (List.length grids) (Sys.time()-.start);
+  Format.printf "@.solved %d grids%t@." (List.length grids) pp_elapsed;
   ()
 
 let () =
   Fmt.set_color_default true;
   let files = ref [] in
   let debug = ref 0 in
+  let pp_time = ref true in
   let opts = [
     "--debug", Arg.Set_int debug, " debug";
     "-d", Arg.Set_int debug, " debug";
+    "--no-time", Arg.Clear pp_time, " do not print solve time";
   ] |> Arg.align in
   Arg.parse opts (fun f -> files := f :: !files) "sudoku_solve [options] <file>";
   Log.set_debug !debug;
   try
-    List.iter (fun f -> solve_file f) !files;
+    List.iter (fun f -> solve_file ~pp_time:!pp_time f) !files;
   with
   | Failure msg | Invalid_argument msg ->
     Format.printf "@{<Red>Error@}:@.%s@." msg;

examples/sudoku/tests/dune

@@ -0,0 +1,12 @@
+
+(rule
+  (targets head15_top1465.out)
+  (deps head15_top1465.txt)
+  (action
+    (with-stdout-to
+      %{targets}
+      (run ../sudoku_solve.exe --no-time %{deps}))))
+
+(alias
+  (name runtest)
+  (action (diff head15_top1465.expected head15_top1465.out)))

examples/sudoku/tests/head15_top1465.expected

@@ -0,0 +1,379 @@
+solve grids in file "head15_top1465.txt"
+parsed 15 grids
+
+#########################
+solve grid:
+  4...3....
+  ...6..8..
+  ........1
+  ....5..9.
+  .8....6..
+  .7.2.....
+  ...1.27..
+  5.3....4.
+  9........
+  
+solution:
+  468931527
+  751624839
+  392578461
+  134756298
+  289413675
+  675289314
+  846192753
+  513867942
+  927345186
+  
+###################
+
+#########################
+solve grid:
+  7.8...3..
+  ...2.1...
+  5........
+  .4.....26
+  3...8....
+  ...1...9.
+  .9.6....4
+  ....7.5..
+  .........
+  
+solution:
+  728946315
+  934251678
+  516738249
+  147593826
+  369482157
+  852167493
+  293615784
+  481379562
+  675824931
+  
+###################
+
+#########################
+solve grid:
+  7.8...3..
+  ...6.1...
+  5........
+  .4.....26
+  3...8....
+  ...1...9.
+  .9.2....4
+  ....7.5..
+  .........
+  
+solution:
+  768942315
+  934651278
+  512738649
+  147593826
+  329486157
+  856127493
+  693215784
+  481379562
+  275864931
+  
+###################
+
+#########################
+solve grid:
+  3.7.4....
+  .......91
+  8........
+  4.....7..
+  ...16....
+  ...25....
+  ......38.
+  .9....5..
+  .2.6.....
+  
+solution:
+  317849265
+  245736891
+  869512473
+  456398712
+  732164958
+  981257634
+  174925386
+  693481527
+  528673149
+  
+###################
+
+#########################
+solve grid:
+  5..7..6..
+  ..38.....
+  ......2..
+  62.4.....
+  .......91
+  7........
+  ....35.8.
+  4.....1..
+  ....9....
+  
+solution:
+  582743619
+  963821547
+  174956238
+  621479853
+  348562791
+  795318426
+  217635984
+  439287165
+  856194372
+  
+###################
+
+#########################
+solve grid:
+  4..7..6..
+  ..38.....
+  ......2..
+  62.5.....
+  .......91
+  7........
+  ....43.8.
+  5.....1..
+  ....9....
+  
+solution:
+  482731659
+  963852417
+  175964238
+  621579843
+  358426791
+  794318526
+  217643985
+  539287164
+  846195372
+  
+###################
+
+#########################
+solve grid:
+  .4..1.2..
+  .....9.7.
+  .1.......
+  ...43.6..
+  8......5.
+  ...2.....
+  7.5..8...
+  ...6..3..
+  9........
+  
+solution:
+  347516289
+  258349176
+  619872543
+  591437628
+  823961754
+  476285931
+  735198462
+  182654397
+  964723815
+  
+###################
+
+#########################
+solve grid:
+  7.5.....2
+  ...4.1...
+  3........
+  .1.6..4..
+  2...5....
+  .......9.
+  ...37....
+  .8....6..
+  .9.....8.
+  
+solution:
+  745896132
+  928431756
+  361725849
+  519683427
+  274159368
+  836247591
+  652378914
+  483912675
+  197564283
+  
+###################
+
+#########################
+solve grid:
+  ......41.
+  9..3.....
+  3...5....
+  .48..7...
+  .......62
+  .1.......
+  6..2....5
+  .7....8..
+  ....9....
+  
+solution:
+  857629413
+  924318657
+  361754928
+  248167539
+  793485162
+  516932784
+  689271345
+  172543896
+  435896271
+  
+###################
+
+#########################
+solve grid:
+  7.5.....2
+  ...4.1...
+  3........
+  .1.6..4..
+  2...5....
+  .......9.
+  ...37....
+  .9....8..
+  .8.....6.
+  
+solution:
+  745896312
+  928431756
+  361527984
+  519683427
+  274159638
+  836742591
+  652378149
+  193264875
+  487915263
+  
+###################
+
+#########################
+solve grid:
+  .8..1....
+  ..5....3.
+  ......4..
+  ...6.5.7.
+  89....2..
+  ...3.....
+  2.....1.9
+  ..67.....
+  ...4.....
+  
+solution:
+  382514697
+  145976832
+  769238415
+  421695378
+  893147256
+  657382941
+  274853169
+  936721584
+  518469723
+  
+###################
+
+#########################
+solve grid:
+  8.9...3..
+  ...7.1...
+  5........
+  .7.....26
+  3...9....
+  ...1...4.
+  .6.2....4
+  ....8.5..
+  .........
+  
+solution:
+  819462375
+  632751489
+  547839612
+  178543926
+  324697158
+  956128743
+  763215894
+  291384567
+  485976231
+  
+###################
+
+#########################
+solve grid:
+  6.9.....8
+  ...7.1...
+  4........
+  ....6...4
+  .2.....3.
+  .3....5..
+  .1.5...7.
+  8...9....
+  ......2..
+  
+solution:
+  679325148
+  283741965
+  451986327
+  598263714
+  124857639
+  736419582
+  912534876
+  867192453
+  345678291
+  
+###################
+
+#########################
+solve grid:
+  ......41.
+  9..3.....
+  3...2....
+  .48..7...
+  .......52
+  .1.......
+  5..2....6
+  .7....8..
+  ....9....
+  
+solution:
+  827569413
+  964318527
+  351724968
+  248157639
+  793486152
+  615932784
+  589271346
+  172643895
+  436895271
+  
+###################
+
+#########################
+solve grid:
+  1...48...
+  .5....9..
+  ..6...3..
+  ...57.2..
+  8.3......
+  ...9.....
+  .......41
+  67.......
+  ...2.....
+  
+solution:
+  139648752
+  758132964
+  246795318
+  461573289
+  893426175
+  527981436
+  982357641
+  674819523
+  315264897
+  
+###################
+
+solved 15 grids

examples/sudoku/tests/head15_top1465.txt

@@ -0,0 +1,15 @@
+4...3.......6..8..........1....5..9..8....6...7.2........1.27..5.3....4.9........
+7.8...3.....2.1...5.........4.....263...8.......1...9..9.6....4....7.5...........
+7.8...3.....6.1...5.........4.....263...8.......1...9..9.2....4....7.5...........
+3.7.4...........918........4.....7.....16.......25..........38..9....5...2.6.....
+5..7..6....38...........2..62.4............917............35.8.4.....1......9....
+4..7..6....38...........2..62.5............917............43.8.5.....1......9....
+.4..1.2.......9.7..1..........43.6..8......5....2.....7.5..8......6..3..9........
+7.5.....2...4.1...3.........1.6..4..2...5...........9....37.....8....6...9.....8.
+......41.9..3.....3...5.....48..7..........62.1.......6..2....5.7....8......9....
+7.5.....2...4.1...3.........1.6..4..2...5...........9....37.....9....8...8.....6.
+.8..1......5....3.......4.....6.5.7.89....2.....3.....2.....1.9..67........4.....
+8.9...3.....7.1...5.........7.....263...9.......1...4..6.2....4....8.5...........
+6.9.....8...7.1...4............6...4.2.....3..3....5...1.5...7.8...9..........2..
+......41.9..3.....3...2.....48..7..........52.1.......5..2....6.7....8......9....
+1...48....5....9....6...3.....57.2..8.3.........9............4167..........2.....