Property-Based Testing with PropEr, Erlang, and Elixir:the order of the elements in the comparison expression(page 53)

Community PragProg Customers
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1

I’m wondering why you chose the following sequence in your expression:
Function under test =:= reference expression

prop_biggest() ->
    ?FORALL(List, (list(integer())),
            begin
                biggest(List) =:= lists:last(lists:sort(List))
            end).

EUnit macros using assertEqual(Expect, Expr), whehe EUnit uses the opposite order of items.

biggest_test() ->
 ?assert(5 =:= biggest([1, 2, 3, 4, 5])),
 ?assert(8 =:= biggest([3, 8, 7, -1])),
 ?assert(0 =:= biggest([0])), 
 ?assert(5 =:= biggest([-10, 5, -901])).

I understand that the order of the elements doesn’t matter. When you proposed your order, what were you guided by, what were your motives?