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require_relative '../../spec_helper'
require_relative '../../core/random/shared/rand'
require 'securerandom'
describe "SecureRandom.random_number" do
it_behaves_like :random_number, :rand, SecureRandom
it_behaves_like :random_number, :random_number, SecureRandom
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 (potentially bignum) integer value for bignum argument" do
max = 12345678901234567890
11.times do
num = SecureRandom.random_number max
num.should be_kind_of(Integer)
(0 <= num).should == true
(num < max).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 value in given (integer) range limits" do
64.times do
num = SecureRandom.random_number 11...13
num.should be_kind_of(Integer)
(11 <= num).should == true
(num < 13).should == true
end
end
it "generates a random value in given big (integer) range limits" do
lower = 12345678901234567890
upper = 12345678901234567890 + 5
32.times do
num = SecureRandom.random_number lower..upper
num.should be_kind_of(Integer)
(lower <= num).should == true
(num <= upper).should == true
end
end
it "generates a random value in given (float) range limits" do
64.times do
num = SecureRandom.random_number 0.6..0.9
num.should be_kind_of(Float)
(0.6 <= num).should == true
(num <= 0.9).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 a random float number between 0.0 and 1.0 if argument is negative float" do
num = SecureRandom.random_number(-11.1)
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
-> {
SecureRandom.random_number(Object.new)
}.should raise_error(ArgumentError)
end
end
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