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Add specs for Random::Formatter#alphanumeric #1222

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@herwinw herwinw commented Nov 30, 2024

Another one for Ruby 3.3 (#1216), but this adds some specs for earlier Ruby versions too.

There are more methods defined on RandomFormatter, we should probably add specs for the remaining methods too.

@andrykonchin
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There are failures on Ruby 3.0. Could you please take a look?

to_s.should_receive(:to_s).and_return("[mock to_s]")
# Using 1 value in chars results in an infinite loop
Random.alphanumeric(1, chars: [to_s, to_s]).should == "[mock to_s]"
end
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It seems chars could contain more than 1 character and all of them will be used, not the first one. But documentation states that The argument chars specifies the character list .... As for me it's worth adding a dedicated test case for it.

require_relative '../../spec_helper'

ruby_version_is "3.1" do
require 'random/formatter'
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@andrykonchin andrykonchin Dec 2, 2024

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Looks like Random::Formatter was available in Ruby 3.0 but was part of securerandom.

Random::Formatter is moved to random/formatter.rb, so that you can use Random#hex, Random#base64, and so on without SecureRandom. [Feature #18190]

https://github.com/ruby/ruby/blob/v3_1_0/NEWS.md
https://bugs.ruby-lang.org/issues/18190

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And it seems Random::Formatter's methods are available on SecureRandom. So ideally we would want to have a shared example to test #alphanumeric for both Random::Formatter and SequreRandom.

SecureRandom.method(:alphanumeric)
# => #<Method: #<Class:SecureRandom>(Random::Formatter)#alphanumeric(n=..., chars: ...)

JFYI there are specs of Random::Formatter methods in https://github.com/ruby/spec/tree/master/library/securerandom that would probably also might be shared.

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