flakey test

[firien]

https://github.com/pushpad/web-push/blob/20f40d9586b524b8c75e64887683931d6e11b078/spec/web_push/vapid_key_spec.rb#L19

occasionally this is 31 bytes

key = nil
30_000.times do |x|
  key = Webpush::VapidKey.new
  if key.curve.private_key.to_s(2).bytesize < 32
    puts x
    break
  end
end

puts([format("%064x", key.curve.private_key.to_i)].pack('H*').bytes[0...3])
puts '---'
puts(key.curve.private_key.to_s(2).bytes[0...3])