test_janus.pl

/*  Part of SWI-Prolog

    Author:        Jan Wielemaker
    E-mail:        jan@swi-prolog.org
    WWW:           http://www.swi-prolog.org
    Copyright (c)  2023-2024, SWI-Prolog Solutions b.v.
    All rights reserved.

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    are met:

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       notice, this list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in
       the documentation and/or other materials provided with the
       distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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*/

:- module(test_janus,
          [ test_janus/0,
            bench_janus/0
          ]).
:- use_module(library(janus)).
:- use_module(library(plunit)).
:- use_module(library(debug)).
:- use_module(library(apply_macros), []).
:- use_module(library(lists), [numlist/3]).
:- use_module(library(statistics), [time/1]).
:- use_module('tests/russel', []).
:- use_module(library(error), [must_be/2]).
:- use_module(library(prolog_code), [comma_list/2]).

:- encoding(utf8).

test_janus :-
    run_tests([ janus_data,
                janus_prolog_data,
                janus_string_as,
                janus_eval,
                janus_py_builtin,
                janus_obj,
                janus_py_object,
                janus_params,
                janus_reflect,
                janus_gc,
		python_call_prolog,
		janus_iter,
		janus_errors,
		janus_unicode,
                janus_load,
		xsb_call,
                demo
              ]).

:- py_add_lib_dir(tests).

:- begin_tests(janus_data).

test(noarg, Z == 42) :-
    py_call(demo:int(), Z).
test(multiply, Z == 6) :-
    py_call(demo:multiply(2,3), Z).
test(bigint, Z == Big) :-
    Big is 1<<1000,
    py_call(janus:echo(Big), Z).
test(rational, Z == 1r3) :-
    py_call(janus:echo(1r3), Z).
test(rational, Z == A) :-
    A is rdiv(random(1<<1000), random(1<<1000)),
    py_call(janus:echo(A), Z).
test(multiply, Z == 6.8) :-
    py_call(demo:multiply(2,3.4), Z).
test(concat, Z == 'aapnoot') :-
    py_call(demo:concat('aap', 'noot'), Z).
test(concat, Z == 'aapno\u0000ot') :-
    py_call(demo:concat('aap', 'no\u0000ot'), Z).
test(concat, Z == [1,2,3]) :-
    py_call(demo:concat([1], [2,3]), Z).
test(dict, Z == py{name:bob, age:42}) :-
    py_call(janus:echo(py{name:bob, age:42}), Z).
test(dict, Z == py{name:bob, age:42}) :-
    py_call(janus:echo({name:bob, age:42}), Z).
test(dict, Z == py{name:bob, age:42}) :-
    py_call(janus:echo(py({name:bob, age:42})), Z).
test(dict, Z == py{name:"bob", age:42}) :-
    py_call(janus:echo(py{name:bob, age:42}), Z, [py_string_as(string)]).
test(nodict, Z == py{}) :-
    py_call(janus:echo(py({})), Z).
test(nodict, Z == {}) :-
    py_call(janus:echo({}), Z).
test(nodict, Z == @true) :-
    py_call(demo:isstr({}), Z).
test(bool, Z == @true) :-
    py_call(janus:echo(@true), Z).
test(bool, Z == @false) :-
    py_call(janus:echo(@false), Z).
test(bool, Z == true) :-
    py_call(janus:echo(true), Z).
test(bool, Z == false) :-
    py_call(janus:echo(false), Z).
test(none, Z == @none) :-
    py_call(janus:echo(@none), Z).
test(none, Z == 'None') :-
    py_call(janus:echo('None'), Z).
test(bool, Z == "true") :-
    py_call(janus:echo(true), Z, [py_string_as(string)]).
test(bool, Z == "false") :-
    py_call(janus:echo(false), Z, [py_string_as(string)]).
test(none, Z == "None") :-
    py_call(janus:echo('None'), Z, [py_string_as(string)]).
test(set, Set == [1, a, false]) :- % True canot be in a Python set??
    py_call(janus:echo(py_set([1,a,false])), py_set(List)),
    sort(List, Set).
test(attr, Val = 42) :-
    py_setattr(demo, test_attr, 42),
    py_call(demo:test_attr, Val).
test(stringify, R == '6') :-
    py_call(janus:echo(#6), R).
test(stringify, R == '3.14') :-
    py_call(janus:echo(#3.14), R).
test(stringify, R == 'false') :-
    py_call(janus:echo(#false), R).
test(stringify, R == 'None') :-
    py_call(janus:echo(#'None'), R).
test(stringify, R == 'aap noot') :-        % does _not_ quote
    py_call(janus:echo(#'aap noot'), R).
test(stringify_wc, R == '+(1,2)') :-       % write_canonical/1
    py_call(janus:echo(#(1 + 2)), R).
test(stringify_wc, R == 'f(A,_,A)') :-     % numbervars
    py_call(janus:echo(#f(X,_,X)), R).
test(dict, R=py{a:1, 2:2}) :-
    py_call(demo:dict1(), R).
test(dict) :-
    py_call(demo:dict1(), R, [py_dict_as({})]),
    assertion(py_same_dict(R, {a:1,2:2})).
test(empty_dict, R == py({})) :-
    py_call(demo:dict0(), R, [py_dict_as({})]).
test(dict) :-                              % invalid key: return as {}
    py_call(demo:dict2(), Dict),
    assertion(py_is_dict(Dict)),
    assertion(py_same_dict(Dict, {a:1,2.3:2})).
test(iterator, L == [1,2,3,4]) :-          % An iterator checks as a sequence
    py_call(range(1,5), L).
test(set, Ordered == [1,2,3]) :-
    py_call(janus:echo(py_set([1,2,3])), Obj, [py_object(true)]),
    py_call(Obj, py_set(Set)),
    sort(Set, Ordered),
    py_call(Obj, Set2),
    assertion(Set2 == py_set(Set)).

:- end_tests(janus_data).

py_same_dict({D1}, {D2}) :-
    comma_list(D1, KV1),
    comma_list(D2, KV2),
    KV1 == KV2.

:- begin_tests(janus_prolog_data).

test(echo, Term =@= Copy) :-
    Term = f(X,X,_),
    py_call(janus:echo(prolog(Term)), Copy).
test(echo, Term =@= Copy) :-
    Term = f(X,X,_),
    py_call(janus:echo(prolog(Term)), Ref, [py_object]),
    py_call(Ref:'__str__'(), Str),
    term_string(Copy, Str).

:- end_tests(janus_prolog_data).

:- begin_tests(janus_string_as).

test(atom, Str == hello) :-
    py_call(janus:echo(string(hello)), Str).
test(string, Str == hello) :-
    py_call(janus:echo(string("hello")), Str).
test(codes, Str == hello) :-
    py_call(janus:echo(string([104,101,108,108,111])), Str).
test(chars, Str == hello) :-
    py_call(janus:echo(string([h,e,l,l,o])), Str).
test(atom, Str == hello) :-
    py_call(janus:echo(hello), Str, [py_string_as(atom)]).
test(string, Str == "hello") :-
    py_call(janus:echo(hello), Str, [py_string_as(string)]).
test(codes, Str == string([104,101,108,108,111])) :-
    py_call(janus:echo(hello), Str, [py_string_as(codes)]).
test(chars, Str == string([h,e,l,l,o])) :-
    py_call(janus:echo(hello), Str, [py_string_as(chars)]).

:- end_tests(janus_string_as).

:- begin_tests(janus_eval).

test(eval) :-
    py_call(janus:echo(eval(sys:path)), Path),
    must_be(list(atom), Path).

:- end_tests(janus_eval).

:- begin_tests(janus_py_builtin).

test(globals, Class == dict) :-
    py_call(globals():'__class__':'__name__', Class).

:- end_tests(janus_py_builtin).

:- begin_tests(janus_obj).

test(self, Self == Dog) :-
    py_call(dog:'Dog'('Fido'), Dog),
    py_call(Dog:self(), Self).
test(dog, Tricks == ['roll over']) :-
    py_call(dog:'Dog'('Fido'), Dog),
    py_call(Dog:add_trick('roll over'), _),
    py_call(Dog:tricks, Tricks).

:- end_tests(janus_obj).

:- begin_tests(janus_py_object).

test(baseclass, X == @none) :-
    py_call(janus:echo(@none), X, [py_object(true)]).
test(baseclass, X == @true) :-
    py_call(janus:echo(@true), X, [py_object(true)]).
test(baseclass, X == @false) :-
    py_call(janus:echo(@false), X, [py_object(true)]).
test(baseclassdint, X == 42) :-
    py_call(janus:echo(42), X, [py_object(true)]).
test(baseclass, X =:= 3.14) :-
    py_call(janus:echo(3.14), X, [py_object(true)]).
test(baseclass, X == 'a string') :-
    py_call(janus:echo('a string'), X, [py_object(true)]).
test(baseclass, X == a-1) :-
    py_call(janus:echo(a-1), X, [py_object(true)]).

test(list, List = [1,2,3]) :-
    py_call(janus:echo([1,2,3]), X, [py_object(true)]),
    assertion(py_is_object(X)),
    py_call(X, List).

test(subclass, V == 42) :-
    py_call(baseclasses:myint(42), X, [py_object(true)]),
    assertion(py_is_object(X)),
    py_call(X, V).

:- end_tests(janus_py_object).

:- begin_tests(janus_params).

test(arg, R == py{a:1,b:2,c:3}) :-
    py_call(demo:kwd(1,2), R).
test(arg, R == py{a:1,b:2,c:4}) :-
    py_call(demo:kwd(1,2,4), R).
test(arg, R == py{a:1,b:a,c:3}) :-
    py_call(demo:kwd(1,b=a), R).
test(arg, R == py{a:1,b:a,c:x}) :-
    py_call(demo:kwd(1,c=x,b=a), R).
test(arg, R == py{a:1,b:2,c:3}) :-
    py_call(demo:kwd_all(), R).
test(arg, R == py{a:1,b:a,c:3}) :-
    py_call(demo:kwd_all(b=a), R).
test(arg, R == py{a:a,b:b,c:c}) :-
    py_call(demo:kwd_all(c=c,b=b,a=a), R).

:- end_tests(janus_params).

:- begin_tests(janus_reflect).

test(hasattr) :-
    py_hasattr(sys, Attr), Attr == path, !.
test(hasattr) :-
    py_hasattr(sys, path).
test(type) :-
    py_call(baseclasses:myint(42), X, [py_object(true)]),
    py_isinstance(X, int).
test(type) :-
    py_call(dog:'Greyhound'('Speedy'), X),
    py_isinstance(X, dog:'Dog').
test(type, Type == 'Greyhound') :-
    py_call(dog:'Greyhound'('Speedy'), X),
    py_type(X, Type).
test(type, Type == int) :-
    py_type(42, Type).
test(obj_has_attr) :-
    py_call(dog:'Greyhound'('Speedy'), X),
    py_hasattr(X, tricks).

:- end_tests(janus_reflect).


:- begin_tests(janus_gc).

% This is rather tricky.  If we do not stop the GC thread AGC may
% already be running and our garbage_collect_atoms/0 call is a dummy.
% Therefore we stop this thread and restore the old mode after the
% test.

test(gc1) :-
    current_prolog_flag(gc_thread, Old),
    set_prolog_gc_thread(false),
    py_setattr(demo, gced, 0),
    forall(between(1, 10 000, _),
           py_call(demo:'GCAble'(), _)),
    garbage_collect_atoms,
    set_prolog_gc_thread(Old),
    py_call(demo:gced, GCed),
    assertion(GCed > 1 000).
test(gc2, [GCed0,GCed] == [10 000, 10 000]) :-
    current_prolog_flag(gc_thread, Old),
    set_prolog_gc_thread(false),
    garbage_collect_atoms,
    py_setattr(demo, gced, 0),
    forall(between(1, 10 000, _),
           ( py_call(demo:'GCAble'(), Obj),
	     py_free(Obj) )),
    py_call(demo:gced, GCed0),
    garbage_collect_atoms,
    set_prolog_gc_thread(Old),
    py_call(demo:gced, GCed).
test(free, GCed == 1) :-
    py_setattr(demo, gced, 0),
    py_call(demo:'GCAble'(), Obj),
    py_free(Obj),
    py_call(demo:gced, GCed).
test(free, error(existence_error('py_object', Obj))) :-
    py_call(demo:'GCAble'(), Obj),
    py_free(Obj),
    py_free(Obj).
test(free, error(existence_error('py_object', Obj))) :-
    py_call(demo:'GCAble'(), Obj),
    py_free(Obj),
    py_setattr(Obj, test, 1).

:- end_tests(janus_gc).

:- begin_tests(python_call_prolog).

test(iter, Sum == 500500) :-
    py_call(demo:bench_query_iter(1000), Sum).
test(iter, Sum == 10011) :-
    py_call(demo:abort_iter(1000), Sum).
test(iter, Sum == 10011) :-             % Check we didn't mess up the Prolog stack
    py_call(demo:abort_iter(1000), Sum).
test(undef, Result == py{truth:Undef}) :-
    py_call(janus:query_once(undefined), Result),
    py_call(janus:undefined, Undef).
test(russel, List == [py{'X':barber,'Y':barber,truth:Undef},
		      py{'X':barber,'Y':mayor,truth: @true}]) :-
    py_call(demo:shaves(), List0),
    sort('Y', @=<, List0, List),
    py_call(janus:undefined, Undef).
test(py_double, Tuples == [1-1,2-1,3-1,
                           1-2,2-2,3-2,
                           1-3,2-3,3-3,
                           1-4,2-4,3-4]) :-
    py_call(demo:double_iter(3,4), Tuples).
test(invalid_nesting, X == @false) :-
    py_call(demo:test_invalid_nesting(), X).
:- if((py_call(sys:hexversion, V), V >= 0x03080000)).
test(invalid_nesting2, [BlobType, BlobStr] ==
                       ['PyObject',               % PrologError is tested for in demo.py
                        "swipl.next_solution(): not inner query"]) :-
    py_call(demo:test_invalid_nesting2(), Blob),
    janus:py_str(Blob, BlobStr), % TODO: re-export py_str from module janus?
    blob(Blob, BlobType).
test(invalid_nesting3, error(python_error('PrologError',_))) :-
    py_call(demo:test_invalid_nesting3(), _).
test(while, X == [1,2,3]) :-
    py_call(while:test_while(), X).
:- endif.
test(apply, X == 3) :-
    py_call(janus:apply_once(user, plus, 1, 2), X).
test(apply, X == 1) :-
    py_call(janus:apply_once(user, between, 1, 2), X).
test(apply, X == 0) :-
    py_call(janus:apply_once(user, between, 3, 2, fail=0), X).
test(apply, error(python_error('PrologError',_))) :-
    py_call(janus:apply_once(user, between, 3, 2), _).
test(apply, error(python_error('PrologError',_))) :-
    py_call(janus:apply_once(janus, no_such_predicate), _).
test(apply, X == 1) :-
    py_call(janus:apply_once(user, =, 1), X).
test(apply, error(python_error('PrologError',_))) :-
    py_call(janus:apply_once(user, =, prolog(f(a))), _).

:- end_tests(python_call_prolog).

:- begin_tests(janus_iter).

test(range, all(X = [0,1,2,3,4,5])) :-
    py_iter(range(0, 6), X).
test(square, all(X = [1,4,9,16])) :-
    py_iter(demo:squares(1,5), X).
test(double, Pairs == [1-1,1-2,2-1,2-2]) :-
    findall(X-Y,
            (   py_iter(range(1,3), X),
                py_iter(range(1,3), Y)
            ), Pairs).

:- end_tests(janus_iter).

:- begin_tests(janus_errors).

test(ex) :-
    py_call(demo:call_except(foo), Ex),
    py_call(Ex:'__str__'(), Str),
    assertion(sub_string(Str,_,_,_,'Unknown procedure: foo/0')).
test(catch) :-
    py_call(demo:try_catch(), Result),
    assertion(Result == @true).         % Otherwise, the exception

:- end_tests(janus_errors).

:- begin_tests(janus_unicode).

test(cyrillic, R == воздуха) :-
    py_call(demo:воздуха(), R).
test(iso_latin_1, R == schloß) :-
    py_call(demo:schloß(), R).

:- end_tests(janus_unicode).

:- begin_tests(janus_load).
:- use_module(library(strings)).

test(load, X == 4) :-
    py_module(load_test,
              {|string||
               | def times_two(n):
               |     return n*2
               |}),
    py_call(load_test:times_two(2), X).
test(reload, [X1,X2] == [6,4]) :-
    py_module(load_test2,
              {|string||
               | def times_two(n):
               |     return n*3
               |}),
    py_call(load_test2:times_two(2), X1),
    py_module(load_test2,
              {|string||
               | def times_two(n):
               |     return n*2
               |}),
    py_call(load_test2:times_two(2), X2).

:- end_tests(janus_load).


:- begin_tests(xsb_call).

test(reverse, X == [py{a:py{b:c}}, -(mytuple), 3, 2, 1]) :-
    py_call(janus:apply_once(lists, reverse,
                             [1,2,3,-(mytuple),py{a:py{b:c}}]),
	    X).
test(comp1, X == [-(1)-1,-(2)-1]) :-
    py_call(janus:comp(user, between, 1, 2), X).
test(comp2, X == [-(1),-(2)]) :-
    py_call(janus:'NO_TRUTHVALS', NoThruthVals),
    py_call(janus:comp(user, between, 1, 2, truth_vals=NoThruthVals), X).
test(cmd, X == @(true)) :-
    py_call(janus:cmd(user, true), X).
test(cmd, X == @(false)) :-
    py_call(janus:cmd(user, fail), X).
test(cmd, X == Undefined) :-
    py_call(janus:undefined, Undefined),
    py_call(janus:cmd(user, undefined), X).
test(cmd, X == @true) :-
    py_call(janus:cmd(test_janus, p, 42), X).
test(cmd, X == @false) :-
    py_call(janus:cmd(test_janus, p, 1), X).
test(cmd, error(python_error('PrologError', _))) :-
    py_call(janus:cmd(test_janus, no_such_pred), _).

test_janus:p(42).

:- end_tests(xsb_call).

:- begin_tests(demo).

test(doc_sqrt, R == py{'truth': @(true), 'Y': 1.4142135623730951}) :-
    py_call(demo:doc_sqrt(), R).

test(doc_user_plus, R == 3) :-
    py_call(demo:doc_user_plus(), R).

test(doc_findall_parent, [blocked('need to define parent/2 predicate'), R == [ 'Kees', 'Jan' ]]) :-
    py_call(demo:doc_findall_parent(), R).

test(doc_has_big_integers, R == @(TrueFalse)) :-
    py_call(demo:doc_has_big_integers(), R),
    (   current_prolog_flag(bounded,false)
    ->  TrueFalse = true
    ;   TrueFalse = false
    ).

test(doc_getRange, R == [3,4,5]) :-
    py_call(demo:doc_getRange(3,5), R).
test(doc_getRange, R == [3,4,5]) :-
    py_call(demo:doc_getRange2(3,5), R).

test(doc_double_iter, R == [1-1, 2-1, 1-2, 2-2, 1-3, 2-3]) :-
    py_call(demo:doc_double_iter(2,3), R).
test(doc_double_iter, R == [1-1, 2-1, 1-2, 2-2, 1-3, 2-3]) :-
    py_call(demo:doc_double_iter2(2,3), R).

test(doc_get_between, R == [1,2,3]) :-
    py_call(demo:doc_get_between(), R).

test(doc_apply_between, R == [1, 2, 3, 4, 5, 6]) :-
    py_call(demo:doc_apply_between(), R).

test(doc_between_1_6, R == [1, 2, 3, 4, 5, 6]) :-
    py_call(demo:doc_between_1_6(), R).

:- end_tests(demo).

bench_janus :-
    bench_python(concat_list(100 000)).

bench_python(concat_list(N)) :-
    numlist(1, N, List),
    time(py_call(demo:concat(List, List), Concat)),
    length(Concat, N2),
    assertion(N*2 =:= N2).