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require File.expand_path('../../../spec_helper', __FILE__)
require 'securerandom'
describe "SecureRandom.random_bytes" do
it "generates a random binary string of length 16 if no argument is provided" do
bytes = SecureRandom.random_bytes
bytes.should be_kind_of(String)
bytes.length.should == 16
end
it "generates a random binary string of length 16 if argument is nil" do
bytes = SecureRandom.random_bytes(nil)
bytes.should be_kind_of(String)
bytes.length.should == 16
end
it "generates a random binary string of specified length" do
(1..64).each do |idx|
bytes = SecureRandom.random_bytes(idx)
bytes.should be_kind_of(String)
bytes.length.should == idx
end
SecureRandom.random_bytes(2.2).length.should eql(2)
end
it "generates different binary strings with subsequent invocations" do
# quick and dirty check, but good enough
values = []
256.times do
val = SecureRandom.random_bytes
# 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 {
SecureRandom.random_bytes(-1)
}.should raise_error(ArgumentError)
end
it "tries to convert the passed argument to an Integer using #to_int" do
obj = mock("to_int")
obj.should_receive(:to_int).and_return(5)
SecureRandom.random_bytes(obj).size.should eql(5)
end
end
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