[erlang-questions] PropEr: integer/2 not generating numbers uniformly
Motiejus Jakštys
desired.mta@REDACTED
Wed Sep 12 10:27:21 CEST 2012
Hi,
?FORALL(
I,
integer(- 1 bsl 100, 1 bsl 100),
begin
Pid ! {instance, I},
true
end
).
collect() ->
collects all numbers, computes min/max and displays them.
I am expecting numbers distributed between
-1267650600228229401496703205376 to 1267650600228229401496703205376.
For 10k tests:
Min: -1135, Max: 761
Min: -2254, Max: 2506
Min: -1510, Max: 734
Min: -955, Max: 1669
Min: -1531, Max: 902
For 100k tests:
Min: -2895, Max: 5668
Min: -2479, Max: 5553
Min: -6423, Max: 2378
Is there a fundamental reason for this behaviour? What would be best
way to create a generator that spans much wider ranges?
Thanks,
Motiejus Jakštys
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