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require File.expand_path('../../../spec_helper', __FILE__)
require 'securerandom'
describe "SecureRandom.random_number" do
it "generates a random positive number smaller then the positive integer argument" do
(1..64).each do |idx|
num = SecureRandom.random_number(idx)
num.should be_kind_of(Fixnum)
(0 <= num).should == true
(num < idx).should == true
end
end
it "generates a random float number between 0.0 and 1.0 if no argument provided" do
64.times do
num = SecureRandom.random_number
num.should be_kind_of(Float)
(0.0 <= num).should == true
(num < 1.0).should == true
end
end
it "generates a random float number between 0.0 and 1.0 if argument is negative" do
num = SecureRandom.random_number(-10)
num.should be_kind_of(Float)
(0.0 <= num).should == true
(num < 1.0).should == true
end
it "generates different float numbers with subsequent invocations" do
# quick and dirty check, but good enough
values = []
256.times do
val = SecureRandom.random_number
# make sure the random values are not repeating
values.include?(val).should == false
values << val
end
end
it "raises ArgumentError if the argument is non-numeric" do
lambda {
SecureRandom.random_number(Object.new)
}.should raise_error(ArgumentError)
end
end
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