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teal

0.1.1
0.1.1 retired 0.1.0

An Erlang library that provides matching and assertion functions for testing.

Retired package: Deprecated - This package hasn't been actively developed in a long time, and I no longer have plans to develop it further.

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teal src teal_numbers.erl
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src/teal_numbers.erl 

-module(teal_numbers).



-export([close_to/3, assert_close_to/3, assert_close_to/4]).



%%%===================================================================

%%% API

%%%===================================================================



-spec close_to(Received :: number(), Expected :: number(),

               Delta :: number()) -> boolean().



close_to(Received, Expected, Delta) ->

    Min = Expected - Delta,

    Max = Expected + Delta,



    case Received of

        Received when Received =< Max, Received >= Min ->

            true;

        _ ->

            false

    end.



-spec assert_close_to(Received :: number(), Expected :: number(),

                      Delta :: number()) -> boolean().



assert_close_to(Received, Expected, Delta) ->

    teal:assert(true, close_to(Received, Expected, Delta), not_in_range).



-spec assert_close_to(Received :: number(), Expected :: number(),

                      Delta :: number(), Msg :: any()) -> boolean().



assert_close_to(Received, Expected, Delta, Msg) ->

    teal:assert(true, close_to(Received, Expected, Delta), Msg).



%%%===================================================================

%%% Private functions

%%%===================================================================