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require_relative '../../spec_helper'
require 'securerandom'
describe "SecureRandom.hex" do
it "generates a random hex string of length twice the specified argument" do
(1..64).each do |idx|
hex = SecureRandom.hex(idx)
hex.should be_kind_of(String)
hex.length.should == 2 * idx
end
base64 = SecureRandom.hex(5.5)
base64.should be_kind_of(String)
base64.length.should eql(10)
end
it "returns an empty string when argument is 0" do
SecureRandom.hex(0).should == ""
end
it "generates different hex strings with subsequent invocations" do
# quick and dirty check, but good enough
values = []
256.times do
hex = SecureRandom.hex
# make sure the random values are not repeating
values.include?(hex).should == false
values << hex
end
end
it "generates a random hex string of length 32 if no argument is provided" do
SecureRandom.hex.should be_kind_of(String)
SecureRandom.hex.length.should == 32
end
it "treats nil argument as default one and generates a random hex string of length 32" do
SecureRandom.hex(nil).should be_kind_of(String)
SecureRandom.hex(nil).length.should == 32
end
it "raises ArgumentError on negative arguments" do
-> {
SecureRandom.hex(-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.hex(obj).size.should eql(10)
end
end
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