-module(decode_test).
-include_lib("eunit/include/eunit.hrl").

-ifdef(TEST).

%% ----------------------------------
%%           Unit tests
%% ----------------------------------

read_next_test() ->
    ?assert(decode:read_next([])       =:= eof),
    ?assert(decode:read_next("i-23e")  =:= {ok, -23}),
    ?assert(decode:read_next("i--23e") =:= {error, double_negation}),
    ?assert(decode:read_next("i-23-e") =:= {error, badargs}),
    ?assert(decode:read_next("4:2453") =:= {ok, "2453"}),
    ?assert(decode:read_next("de")     =:= {ok, #{}}),
    ?assert(decode:read_next(#{})      =:= {error, badargs}).

parse_result_test() ->
    ?assert(decode:parse_result({error, reason}) =:= {error, reason}),
    ?assert(decode:parse_result({[], reason})    =:= {ok, reason}),
    ?assert(decode:parse_result("testing")       =:= "testing").

get_list_test() ->
    ?assert(decode:get_list("i23elel2:23ee") =:= {[], [23, [], ["23"]]}),
    ?assert(decode:get_list("e2:23")         =:= {"2:23", []}).

get_dict_test() ->
    ?assert(decode:get_dict("e")                          =:= {[], #{}}),
    ?assert(decode:get_dict("lee")                        =:= {error, list_as_key}),
    ?assert(decode:get_dict("dee")                        =:= {error, dict_as_key}),
    ?assert(decode:get_dict("3:heje")                     =:= {error, no_end}),
    ?assert(decode:get_dict("")                           =:= {error, no_end}),
    ?assert(decode:get_dict("i23e4:teste")                =:= {[], #{23 => "test"}}),
    ?assert(decode:get_dict("i23e3:hay6:warden6:clyffee") =:= {[], #{23 => "hay", "warden" => "clyffe"}}).

get_key_and_value_test() ->
    ?assert(decode:get_key_and_value({"i23ee", "test"}, #{}) =:= {[], #{"test" => 23}}),
    ?assert(decode:get_key_and_value({"lee", 23}, #{})       =:= {[],#{23 => []}}).

read_number_test() ->
    ?assert(decode:read_number("2453e")  =:= {[], 2453}),
    ?assert(decode:read_number("e")      =:= {[], 0}),
    ?assert(decode:read_number("-2453e") =:= {[], -2453}),
    ?assert(decode:read_number("2-453e") =:= {error, badargs}),
    ?assert(decode:read_number("253")    =:= {error, no_end}),
    ?assert(decode:read_number("25 3")   =:= {error, badargs}),
    ?assert(decode:read_number("2d53")   =:= {error, badargs}),
    ?assert(decode:read_number("i253e")  =:= {error, badargs}).

test_if_integer_test() ->
    ?assert(decode:test_if_integer(23)       =:= false),
    ?assert(decode:test_if_integer("23")     =:= true),
    ?assert(decode:test_if_integer("2he3j5") =:= false),
    ?assert(decode:test_if_integer("24 321") =:= false),
    ?assert(decode:test_if_integer(" 23")    =:= false).

read_string_test() ->
    ?assert(decode:read_string("3:heji23e", 0)     =:= {"i23e", "hej"}),
    ?assert(decode:read_string("q6:wardeni23e", 0) =:= {error, not_a_number}),
    ?assert(decode:read_string("10:wardeni23e", 0) =:= {[], "wardeni23e"}).

get_string_tuple_test() ->
    ?assert(decode:get_string_tuple("Hello World", 0)  =:= {error, eof}),
    ?assert(decode:get_string_tuple([], 10)            =:= {error, invalid_length}),
    ?assert(decode:get_string_tuple("Hello World", 4)  =:= {"o World", "Hell"}),
    ?assert(decode:get_string_tuple("Hello World", 11) =:= {"", "Hello World"}).

-endif.