% This file is part of Jiffy released under the MIT license.
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% See the LICENSE file for more information.
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-module(jiffy_tests).
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-include_lib("proper/include/proper.hrl").
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-include_lib("eunit/include/eunit.hrl").
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proper_test_() ->
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PropErOpts = [
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{to_file, user},
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{max_size, 15},
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{numtests, 1000}
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],
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{timeout, 3600, ?_assertEqual([], proper:module(jiffy_tests, PropErOpts))}.
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prop_encode_decode() ->
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?FORALL(Data, json(),
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begin
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%io:format(standard_error, "Data: ~p~n", [Data]),
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Data == jiffy:decode(jiffy:encode(Data))
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end
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).
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prop_encode_decode_pretty() ->
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?FORALL(Data, json(),
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begin
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Data == jiffy:decode(jiffy:encode(Data, [pretty]))
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end
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).
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prop_encode_not_crash() ->
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?FORALL(Data, any(), begin catch jiffy:encode(Data), true end).
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prop_decode_not_crash_bin() ->
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?FORALL(Data, binary(), begin catch jiffy:decode(Data), true end).
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prop_decode_not_crash_any() ->
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?FORALL(Data, any(), begin catch jiffy:decode(Data), true end).
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% JSON Generation
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json_null() ->
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null.
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json_boolean() ->
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oneof([true, false]).
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json_number() ->
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oneof([integer(), float()]).
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json_string() ->
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escaped_utf8_bin().
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json_list(S) when S =< 0 ->
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[];
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json_list(S) ->
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?LETSHRINK(
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[ListSize],
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[integer(0, S)],
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vector(ListSize, json_text(S - ListSize))
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).
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json_object(S) when S =< 0 ->
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{[]};
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json_object(S) ->
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?LETSHRINK(
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[ObjectSize],
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[integer(0, S)],
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{vector(ObjectSize, {json_string(), json_text(S - ObjectSize)})}
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).
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json_value() ->
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oneof([
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json_null(),
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json_boolean(),
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json_string(),
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json_number()
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]).
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json_text(S) when S > 0 ->
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?LAZY(oneof([
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json_list(S),
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json_object(S)
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]));
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json_text(_) ->
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json_value().
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json() ->
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?SIZED(S, json_text(S)).
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%% XXX: Add generators
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%
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% We should add generators that generate JSON binaries directly
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% so we can test things that aren't produced by the encoder.
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%
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% We should also have a version of the JSON generator that inserts
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% errors into the JSON that we can test for.
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escaped_utf8_bin() ->
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?SUCHTHAT(Bin,
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?LET(S, ?SUCHTHAT(L, list(escaped_char()), L /= []),
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unicode:characters_to_binary(S, unicode, utf8)),
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is_binary(Bin)
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).
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escaped_char() ->
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?LET(C, char(),
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case C of
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$" -> "\\\"";
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C when C == 65534 -> 65533;
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C when C == 65535 -> 65533;
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C when C > 1114111 -> 1114111;
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C -> C
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end
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).
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