require File.expand_path('../../../../../spec_helper', __FILE__)
require 'openssl'

describe :openssl_random_bytes, :shared => true do |cmd|
  it "generates a random binary string of specified length" do
    (1..64).each do |idx|
      bytes = OpenSSL::Random.pseudo_bytes(idx)
      bytes.should be_kind_of(String)
      bytes.length.should == idx
    end
  end

  it "generates different binary strings with subsequent invocations" do
    # quick and dirty check, but good enough
    values = []
    256.times do
      val = OpenSSL::Random.pseudo_bytes(16)
      # make sure the random bytes are not repeating
      values.include?(val).should == false
      values << val
    end
  end

  it "raises ArgumentError on negative arguments" do
    lambda {
      OpenSSL::Random.pseudo_bytes(-1)
    }.should raise_error(ArgumentError)
  end
end