src/Tools/quickcheck.ML
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(*  Title:      Tools/quickcheck.ML
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    Author:     Stefan Berghofer, Florian Haftmann, Lukas Bulwahn, TU Muenchen
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Generic counterexample search engine.
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*)
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signature QUICKCHECK =
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sig
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  val setup: theory -> theory
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  (* configuration *)
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  val auto: bool Unsynchronized.ref
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  val timing : bool Unsynchronized.ref
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  val tester : string Config.T
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  val size : int Config.T
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  val iterations : int Config.T
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  val no_assms : bool Config.T
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  val report : bool Config.T
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  val quiet : bool Config.T
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  val timeout : real Config.T
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  val finite_types : bool Config.T
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  val finite_type_size : int Config.T
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  datatype report = Report of
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    { iterations : int, raised_match_errors : int,
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      satisfied_assms : int list, positive_concl_tests : int }
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  datatype expectation = No_Expectation | No_Counterexample | Counterexample;
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  datatype test_params = Test_Params of {default_type: typ list, expect : expectation};
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  val test_params_of : Proof.context -> test_params
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  val map_test_params : (typ list * expectation -> typ list * expectation)
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    -> Context.generic -> Context.generic
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  val add_generator:
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    string * (Proof.context -> term -> int -> term list option * report option)
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      -> Context.generic -> Context.generic
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  val add_batch_generator:
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    string * (Proof.context -> term list -> (int -> term list option) list)
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      -> Context.generic -> Context.generic
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  (* testing terms and proof states *)
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  val test_term: Proof.context -> bool * bool -> term ->
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    (string * term) list option * ((string * int) list * ((int * report) list) option)
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  val test_goal_terms:
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    Proof.context -> bool * bool -> (string * typ) list -> term list
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      -> (string * term) list option * ((string * int) list * ((int * report) list) option) list
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  val quickcheck: (string * string list) list -> int -> Proof.state -> (string * term) list option
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  (* testing a batch of terms *)
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  val test_terms: Proof.context -> term list -> (string * term) list option list option
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end;
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structure Quickcheck : QUICKCHECK =
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struct
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(* preferences *)
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val auto = Unsynchronized.ref false;
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val timing = Unsynchronized.ref false;
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val _ =
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  ProofGeneralPgip.add_preference Preferences.category_tracing
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  (Unsynchronized.setmp auto true (fn () =>
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    Preferences.bool_pref auto
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      "auto-quickcheck"
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      "Run Quickcheck automatically.") ());
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(* quickcheck report *)
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datatype report = Report of
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  { iterations : int, raised_match_errors : int,
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    satisfied_assms : int list, positive_concl_tests : int }
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(* expectation *)
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datatype expectation = No_Expectation | No_Counterexample | Counterexample;
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fun merge_expectation (expect1, expect2) =
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  if expect1 = expect2 then expect1 else No_Expectation
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(* quickcheck configuration -- default parameters, test generators *)
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val (tester, setup_tester) = Attrib.config_string "quickcheck_tester" (K "")
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val (size, setup_size) = Attrib.config_int "quickcheck_size" (K 10)
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val (iterations, setup_iterations) = Attrib.config_int "quickcheck_iterations" (K 100)
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val (no_assms, setup_no_assms) = Attrib.config_bool "quickcheck_no_assms" (K false)
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val (report, setup_report) = Attrib.config_bool "quickcheck_report" (K true)
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val (quiet, setup_quiet) = Attrib.config_bool "quickcheck_quiet" (K false)
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val (timeout, setup_timeout) = Attrib.config_real "quickcheck_timeout" (K 30.0)
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val (finite_types, setup_finite_types) = Attrib.config_bool "quickcheck_finite_types" (K true)
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val (finite_type_size, setup_finite_type_size) =
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  Attrib.config_int "quickcheck_finite_type_size" (K 3)
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val setup_config =
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  setup_tester #> setup_size #> setup_iterations #> setup_no_assms #> setup_report #> setup_quiet
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    #> setup_timeout #> setup_finite_types #> setup_finite_type_size
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datatype test_params = Test_Params of
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  {default_type: typ list, expect : expectation};
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fun dest_test_params (Test_Params {default_type, expect}) = (default_type, expect);
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fun make_test_params (default_type, expect) =
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  Test_Params {default_type = default_type, expect = expect};
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fun map_test_params' f (Test_Params {default_type, expect}) =
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  make_test_params (f (default_type, expect));
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fun merge_test_params
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  (Test_Params {default_type = default_type1, expect = expect1},
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    Test_Params {default_type = default_type2, expect = expect2}) =
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  make_test_params
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    (merge (op =) (default_type1, default_type2), merge_expectation (expect1, expect2));
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structure Data = Generic_Data
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(
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  type T =
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    ((string * (Proof.context -> term -> int -> term list option * report option)) list
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      * (string * (Proof.context -> term list -> (int -> term list option) list)) list)
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      * test_params;
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  val empty = (([], []), Test_Params {default_type = [], expect = No_Expectation});
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  val extend = I;
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  fun merge (((generators1, batch_generators1), params1), ((generators2, batch_generators2), params2)) : T =
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    ((AList.merge (op =) (K true) (generators1, generators2),
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    AList.merge (op =) (K true) (batch_generators1, batch_generators2)),
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      merge_test_params (params1, params2));
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);
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val test_params_of = snd o Data.get o Context.Proof;
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val default_type = fst o dest_test_params o test_params_of
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val expect = snd o dest_test_params o test_params_of
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val map_test_params = Data.map o apsnd o map_test_params'
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val add_generator = Data.map o apfst o apfst o AList.update (op =);
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val add_batch_generator = Data.map o apfst o apsnd o AList.update (op =);
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(* generating tests *)
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fun gen_mk_tester lookup ctxt v =
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  let
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    val name = Config.get ctxt tester
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    val tester = case lookup ctxt name
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      of NONE => error ("No such quickcheck tester: " ^ name)
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      | SOME tester => tester ctxt;
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  in
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    if Config.get ctxt quiet then
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      try tester v
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    else
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      let
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        val tester = Exn.interruptible_capture tester v
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      in case Exn.get_result tester of
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          NONE => SOME (Exn.release tester)
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        | SOME tester => SOME tester
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      end
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  end
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val mk_tester = gen_mk_tester (fn ctxt =>
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  AList.lookup (op =) ((fst o fst o Data.get o Context.Proof) ctxt))
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val mk_batch_tester = gen_mk_tester (fn ctxt => AList.lookup (op =) ((snd o fst o Data.get o Context.Proof) ctxt))
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(* testing propositions *)
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fun prep_test_term t =
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  let
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    val _ = (null (Term.add_tvars t []) andalso null (Term.add_tfrees t [])) orelse
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      error "Term to be tested contains type variables";
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    val _ = null (Term.add_vars t []) orelse
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      error "Term to be tested contains schematic variables";
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    val frees = Term.add_frees t [];
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  in (frees, list_abs_free (frees, t)) end
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fun cpu_time description e =
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  let val ({cpu, ...}, result) = Timing.timing e ()
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  in (result, (description, Time.toMilliseconds cpu)) end
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fun limit ctxt (limit_time, is_interactive) f exc () =
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  if limit_time then
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      TimeLimit.timeLimit (seconds (Config.get ctxt timeout)) f ()
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    handle TimeLimit.TimeOut =>
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      if is_interactive then exc () else raise TimeLimit.TimeOut
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  else
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    f ()
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fun test_term ctxt (limit_time, is_interactive) t =
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  let
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    val (names, t') = apfst (map fst) (prep_test_term t);
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    val current_size = Unsynchronized.ref 0
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    fun excipit s =
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      "Quickcheck " ^ s ^ " while testing at size " ^ string_of_int (!current_size)
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    val (test_fun, comp_time) = cpu_time "quickcheck compilation" (fn () => mk_tester ctxt t');
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    fun with_size test_fun k reports =
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      if k > Config.get ctxt size then
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        (NONE, reports)
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      else
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        let
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          val _ = if Config.get ctxt quiet then () else Output.urgent_message
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            ("Test data size: " ^ string_of_int k)
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          val _ = current_size := k
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          val ((result, new_report), timing) =
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            cpu_time ("size " ^ string_of_int k) (fn () => test_fun (k - 1))
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          val reports = case new_report of NONE => reports | SOME rep => (k, rep) :: reports
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        in
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          case result of NONE => with_size test_fun (k + 1) reports | SOME q => (SOME q, reports)
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        end;
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  in
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    case test_fun of NONE => (NONE, ([comp_time], NONE))
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      | SOME test_fun =>
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        limit ctxt (limit_time, is_interactive) (fn () =>
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          let
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            val ((result, reports), exec_time) =
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              cpu_time "quickcheck execution" (fn () => with_size test_fun 1 [])
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          in
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            (case result of NONE => NONE | SOME ts => SOME (names ~~ ts),
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              ([exec_time, comp_time],
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               if Config.get ctxt report andalso not (null reports) then SOME reports else NONE))
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          end) (fn () => error (excipit "ran out of time")) ()
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  end;
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fun test_terms ctxt ts =
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  let
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    val (namess, ts') = split_list (map (fn t => apfst (map fst) (prep_test_term t)) ts)
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    val test_funs = mk_batch_tester ctxt ts'
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    fun with_size tester k =
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      if k > Config.get ctxt size then NONE
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      else case tester k of SOME ts => SOME ts | NONE => with_size tester (k + 1)
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    val results =
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      Option.map (map (fn test_fun => TimeLimit.timeLimit (seconds (Config.get ctxt timeout))
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            (fn () => with_size test_fun 1)  ()
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           handle TimeLimit.TimeOut => NONE)) test_funs
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  in
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    Option.map (map2 (fn names => Option.map (fn ts => names ~~ ts)) namess) results
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  end
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(* FIXME: this function shows that many assumptions are made upon the generation *)
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(* In the end there is probably no generic quickcheck interface left... *)
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fun test_term_with_increasing_cardinality ctxt (limit_time, is_interactive) ts =
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  let
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    val thy = ProofContext.theory_of ctxt
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    val (freess, ts') = split_list (map prep_test_term ts)
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    val Ts = map snd (hd freess)
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    val (test_funs, comp_time) = cpu_time "quickcheck compilation"
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      (fn () => map (mk_tester ctxt) ts')
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    fun test_card_size (card, size) =
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      (* FIXME: why decrement size by one? *)
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      case fst (the (nth test_funs (card - 1)) (size - 1)) of
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        SOME ts => SOME (map fst (nth freess (card - 1)) ~~ ts)
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      | NONE => NONE
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    val enumeration_card_size =
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      if forall (fn T => Sign.of_sort thy (T,  ["Enum.enum"])) Ts then
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        (* size does not matter *)
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        map (rpair 0) (1 upto (length ts))
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      else
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        (* size does matter *)
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        map_product pair (1 upto (length ts)) (1 upto (Config.get ctxt size))
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        |> sort (fn ((c1, s1), (c2, s2)) => int_ord ((c1 + s1), (c2 + s2)))
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    in
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      if (forall is_none test_funs) then
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        (NONE, ([comp_time], NONE))
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      else if (forall is_some test_funs) then
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        limit ctxt (limit_time, is_interactive) (fn () =>
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          (get_first test_card_size enumeration_card_size, ([comp_time], NONE)))
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          (fn () => error "Quickcheck ran out of time") ()
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      else
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        error "Unexpectedly, testers of some cardinalities are executable but others are not"
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    end
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fun get_finite_types ctxt =
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  fst (chop (Config.get ctxt finite_type_size)
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    (map (Type o rpair []) ["Enum.finite_1", "Enum.finite_2", "Enum.finite_3",
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     "Enum.finite_4", "Enum.finite_5"]))
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exception WELLSORTED of string
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fun monomorphic_term thy insts default_T =
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  let
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    fun subst (T as TFree (v, S)) =
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      let
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        val T' = AList.lookup (op =) insts v
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          |> the_default default_T
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      in if Sign.of_sort thy (T', S) then T'
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        else raise (WELLSORTED ("For instantiation with default_type " ^
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          Syntax.string_of_typ_global thy default_T ^
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          ":\n" ^ Syntax.string_of_typ_global thy T' ^
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          " to be substituted for variable " ^
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          Syntax.string_of_typ_global thy T ^ " does not have sort " ^
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          Syntax.string_of_sort_global thy S))
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      end
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      | subst T = T;
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  in (map_types o map_atyps) subst end;
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datatype wellsorted_error = Wellsorted_Error of string | Term of term
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fun test_goal_terms lthy (limit_time, is_interactive) insts check_goals =
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  let
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    val thy = ProofContext.theory_of lthy
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    val default_insts =
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      if Config.get lthy finite_types then (get_finite_types lthy) else (default_type lthy)
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    val inst_goals =
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      map (fn check_goal =>
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        if not (null (Term.add_tfree_names check_goal [])) then
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          map (fn T =>
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            (pair (SOME T) o Term o Object_Logic.atomize_term thy o monomorphic_term thy insts T)
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              check_goal
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              handle WELLSORTED s => (SOME T, Wellsorted_Error s)) default_insts
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        else
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          [(NONE, Term (Object_Logic.atomize_term thy check_goal))]) check_goals
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    val error_msg =
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      cat_lines
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        (maps (map_filter (fn (_, Term t) => NONE | (_, Wellsorted_Error s) => SOME s)) inst_goals)
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    fun is_wellsorted_term (T, Term t) = SOME (T, t)
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      | is_wellsorted_term (_, Wellsorted_Error s) = NONE
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    val correct_inst_goals =
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      case map (map_filter is_wellsorted_term) inst_goals of
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        [[]] => error error_msg
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      | xs => xs
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    val _ = if Config.get lthy quiet then () else warning error_msg
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    fun collect_results f reports [] = (NONE, rev reports)
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      | collect_results f reports (t :: ts) =
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        case f t of
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          (SOME res, report) => (SOME res, rev (report :: reports))
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        | (NONE, report) => collect_results f (report :: reports) ts
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    fun test_term' goal =
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      case goal of
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        [(NONE, t)] => test_term lthy (limit_time, is_interactive) t
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      | ts => test_term_with_increasing_cardinality lthy (limit_time, is_interactive) (map snd ts)
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  in
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    if Config.get lthy finite_types then
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      collect_results test_term' [] correct_inst_goals
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    else
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      collect_results (test_term lthy (limit_time, is_interactive)) [] (maps (map snd) correct_inst_goals)
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  end;
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fun test_goal (time_limit, is_interactive) insts i state =
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  let
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    val lthy = Proof.context_of state;
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    val thy = Proof.theory_of state;
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    fun strip (Const ("all", _) $ Abs (_, _, t)) = strip t
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      | strip t = t;
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    val {goal = st, ...} = Proof.raw_goal state;
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    val (gi, frees) = Logic.goal_params (prop_of st) i;
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    val some_locale = case (Option.map #target o Named_Target.peek) lthy
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     of NONE => NONE
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      | SOME "" => NONE
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      | SOME locale => SOME locale;
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    val assms = if Config.get lthy no_assms then [] else case some_locale
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     of NONE => Assumption.all_assms_of lthy
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      | SOME locale => Assumption.local_assms_of lthy (Locale.init locale thy);
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    val proto_goal = Logic.list_implies (map Thm.term_of assms, subst_bounds (frees, strip gi));
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    val check_goals = case some_locale
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     of NONE => [proto_goal]
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      | SOME locale => map (fn (_, phi) => Morphism.term phi proto_goal)
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        (Locale.registrations_of (Context.Theory thy) (*FIXME*) locale);
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  in
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    test_goal_terms lthy (time_limit, is_interactive) insts check_goals
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  end
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(* pretty printing *)
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fun tool_name auto = (if auto then "Auto " else "") ^ "Quickcheck"
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fun pretty_counterex ctxt auto NONE = Pretty.str (tool_name auto ^ " found no counterexample.")
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  | pretty_counterex ctxt auto (SOME cex) =
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      Pretty.chunks (Pretty.str (tool_name auto ^ " found a counterexample:\n") ::
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        map (fn (s, t) =>
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          Pretty.block [Pretty.str (s ^ " ="), Pretty.brk 1, Syntax.pretty_term ctxt t]) (rev cex));
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fun pretty_report (Report {iterations = iterations, raised_match_errors = raised_match_errors,
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    satisfied_assms = satisfied_assms, positive_concl_tests = positive_concl_tests}) =
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  let
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    fun pretty_stat s i = Pretty.block ([Pretty.str (s ^ ": " ^ string_of_int i)])
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  in
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     ([pretty_stat "iterations" iterations,
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     pretty_stat "match exceptions" raised_match_errors]
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     @ map_index
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       (fn (i, n) => pretty_stat ("satisfied " ^ string_of_int (i + 1) ^ ". assumption") n)
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       satisfied_assms
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     @ [pretty_stat "positive conclusion tests" positive_concl_tests])
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  end
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fun pretty_reports ctxt (SOME reports) =
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  Pretty.chunks (Pretty.fbrk :: Pretty.str "Quickcheck report:" ::
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    maps (fn (size, report) =>
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      Pretty.str ("size " ^ string_of_int size ^ ":") :: pretty_report report @ [Pretty.brk 1])
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      (rev reports))
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  | pretty_reports ctxt NONE = Pretty.str ""
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fun pretty_counterex_and_reports ctxt auto (cex, timing_and_reports) =
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  Pretty.chunks (pretty_counterex ctxt auto cex ::
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    map (pretty_reports ctxt) (map snd timing_and_reports))
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(* automatic testing *)
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fun auto_quickcheck state =
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  let
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    val ctxt = Proof.context_of state;
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    val res =
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      state
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      |> Proof.map_context (Config.put report false #> Config.put quiet true)
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      |> try (test_goal (false, false) [] 1);
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  in
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    case res of
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      NONE => (false, state)
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    | SOME (NONE, report) => (false, state)
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    | SOME (cex, report) => (true, Proof.goal_message (K (Pretty.chunks [Pretty.str "",
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        Pretty.mark Markup.hilite (pretty_counterex ctxt true cex)])) state)
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  end
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val setup = Auto_Tools.register_tool (auto, auto_quickcheck)
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  #> setup_config
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(* Isar commands *)
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fun read_nat s = case (Library.read_int o Symbol.explode) s
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 of (k, []) => if k >= 0 then k
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      else error ("Not a natural number: " ^ s)
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  | (_, _ :: _) => error ("Not a natural number: " ^ s);
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fun read_bool "false" = false
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  | read_bool "true" = true
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  | read_bool s = error ("Not a Boolean value: " ^ s)
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fun read_real s =
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  case (Real.fromString s) of
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   423
    SOME s => s
a2866dbfbe6b changing timeout to real value; handling Interrupt and Timeout more like nitpick does
bulwahn
parents: 40253
diff changeset
   424
  | NONE => error ("Not a real number: " ^ s)
a2866dbfbe6b changing timeout to real value; handling Interrupt and Timeout more like nitpick does
bulwahn
parents: 40253
diff changeset
   425
37929
22e0797857e6 adding checking of expected result for the tool quickcheck; annotated a few quickcheck examples
bulwahn
parents: 37913
diff changeset
   426
fun read_expectation "no_expectation" = No_Expectation
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   427
  | read_expectation "no_counterexample" = No_Counterexample
37929
22e0797857e6 adding checking of expected result for the tool quickcheck; annotated a few quickcheck examples
bulwahn
parents: 37913
diff changeset
   428
  | read_expectation "counterexample" = Counterexample
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   429
  | read_expectation s = error ("Not an expectation value: " ^ s)
37929
22e0797857e6 adding checking of expected result for the tool quickcheck; annotated a few quickcheck examples
bulwahn
parents: 37913
diff changeset
   430
41862
a38536bf2736 adding function Quickcheck.test_terms to provide checking a batch of terms
bulwahn
parents: 41754
diff changeset
   431
fun valid_tester_name genctxt = AList.defined (op =) (fst (fst (Data.get genctxt)))
40912
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   432
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   433
fun parse_tester name genctxt =
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   434
  if valid_tester_name genctxt name then
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   435
    Config.put_generic tester name genctxt
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   436
  else
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   437
    error ("Unknown tester: " ^ name)
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   438
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   439
fun parse_test_param ("tester", [arg]) = parse_tester arg
40909
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   440
  | parse_test_param ("size", [arg]) = Config.put_generic size (read_nat arg)
40644
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   441
  | parse_test_param ("iterations", [arg]) = Config.put_generic iterations (read_nat arg)
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   442
  | parse_test_param ("default_type", arg) = (fn gen_ctxt =>
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   443
    map_test_params
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   444
      ((apfst o K) (map (ProofContext.read_typ (Context.proof_of gen_ctxt)) arg)) gen_ctxt)
40644
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   445
  | parse_test_param ("no_assms", [arg]) = Config.put_generic no_assms (read_bool arg)
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   446
  | parse_test_param ("expect", [arg]) = map_test_params ((apsnd o K) (read_expectation arg))
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   447
  | parse_test_param ("report", [arg]) = Config.put_generic report (read_bool arg)
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   448
  | parse_test_param ("quiet", [arg]) = Config.put_generic quiet (read_bool arg)
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   449
  | parse_test_param ("timeout", [arg]) = Config.put_generic timeout (read_real arg)
40646
3dfa41e89738 adding option finite_types to quickcheck
bulwahn
parents: 40644
diff changeset
   450
  | parse_test_param ("finite_types", [arg]) = Config.put_generic finite_types (read_bool arg)
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   451
  | parse_test_param ("finite_type_size", [arg]) =
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   452
    Config.put_generic finite_type_size (read_nat arg)
40912
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   453
  | parse_test_param (name, _) = fn genctxt =>
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   454
    if valid_tester_name genctxt name then
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   455
      Config.put_generic tester name genctxt
1108529100ce checking if parameter is name of a tester which allows e.g. quickcheck[random]
bulwahn
parents: 40911
diff changeset
   456
    else error ("Unknown tester or test parameter: " ^ name);
28315
d3cf88fe77bc generic quickcheck framework
haftmann
parents: 28309
diff changeset
   457
40909
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   458
fun parse_test_param_inst (name, arg) (insts, ctxt) =
28336
a8edf4c69a79 fixed quickcheck parameter syntax
haftmann
parents: 28315
diff changeset
   459
      case try (ProofContext.read_typ ctxt) name
40909
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   460
       of SOME (TFree (v, _)) => (apfst o AList.update (op =))
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   461
              (v, ProofContext.read_typ ctxt (the_single arg)) (insts, ctxt)
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   462
        | _ => (apsnd o Context.proof_map o parse_test_param) (name, arg) (insts, ctxt);
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   463
40644
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   464
fun quickcheck_params_cmd args = Context.theory_map (fold parse_test_param args);
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   465
35378
95d0e3adf38e added basic reporting of test cases to quickcheck
bulwahn
parents: 35324
diff changeset
   466
fun gen_quickcheck args i state =
40644
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   467
  state
40909
e006d1e06920 renamed parameter from generator to tester; quickcheck only applies one tester on invocation
bulwahn
parents: 40908
diff changeset
   468
  |> Proof.map_context_result (fn ctxt => fold parse_test_param_inst args ([], ctxt))
41754
aa94a003dcdf quickcheck can be invoked with its internal timelimit or without
bulwahn
parents: 41753
diff changeset
   469
  |> (fn (insts, state') => test_goal (true, true) insts i state'
40644
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   470
  |> tap (fn (SOME x, _) => if expect (Proof.context_of state') = No_Counterexample then
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   471
               error ("quickcheck expected to find no counterexample but found one") else ()
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   472
           | (NONE, _) => if expect (Proof.context_of state') = Counterexample then
0850a2a16dce changed old-style quickcheck configurations to new Config.T configurations
bulwahn
parents: 40643
diff changeset
   473
               error ("quickcheck expected to find a counterexample but did not find one") else ()))
32297
3a4081abb3f7 Quickcheck callable from ML
boehmes
parents: 31599
diff changeset
   474
36960
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   475
fun quickcheck args i state = fst (gen_quickcheck args i state);
35378
95d0e3adf38e added basic reporting of test cases to quickcheck
bulwahn
parents: 35324
diff changeset
   476
32297
3a4081abb3f7 Quickcheck callable from ML
boehmes
parents: 31599
diff changeset
   477
fun quickcheck_cmd args i state =
35378
95d0e3adf38e added basic reporting of test cases to quickcheck
bulwahn
parents: 35324
diff changeset
   478
  gen_quickcheck args i (Toplevel.proof_of state)
40225
2de5dd0cd3a2 clear identification
blanchet
parents: 40148
diff changeset
   479
  |> Pretty.writeln o pretty_counterex_and_reports (Toplevel.context_of state) false;
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   480
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   481
val parse_arg =
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   482
  Parse.name --
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   483
    (Scan.optional (Parse.$$$ "=" |--
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   484
      (((Parse.name || Parse.float_number) >> single) ||
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   485
        (Parse.$$$ "[" |-- Parse.list1 Parse.name --| Parse.$$$ "]"))) ["true"]);
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   486
41517
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   487
val parse_args =
7267fb5b724b observe line length limit;
wenzelm
parents: 41472
diff changeset
   488
  Parse.$$$ "[" |-- Parse.list1 parse_arg --| Parse.$$$ "]" || Scan.succeed [];
28336
a8edf4c69a79 fixed quickcheck parameter syntax
haftmann
parents: 28315
diff changeset
   489
36960
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   490
val _ =
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   491
  Outer_Syntax.command "quickcheck_params" "set parameters for random testing" Keyword.thy_decl
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   492
    (parse_args >> (fn args => Toplevel.theory (quickcheck_params_cmd args)));
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   493
36960
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   494
val _ =
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   495
  Outer_Syntax.improper_command "quickcheck" "try to find counterexample for subgoal" Keyword.diag
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   496
    (parse_args -- Scan.optional Parse.nat 1
01594f816e3a prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
wenzelm
parents: 36610
diff changeset
   497
      >> (fn (args, i) => Toplevel.no_timing o Toplevel.keep (quickcheck_cmd args i)));
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   498
28315
d3cf88fe77bc generic quickcheck framework
haftmann
parents: 28309
diff changeset
   499
end;
28309
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   500
c24bc53c815c some steps towards generic quickcheck framework
haftmann
parents: 28256
diff changeset
   501
28315
d3cf88fe77bc generic quickcheck framework
haftmann
parents: 28309
diff changeset
   502
val auto_quickcheck = Quickcheck.auto;