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# -*- encoding: binary -*-
require File.expand_path('../../../spec_helper', __FILE__)
describe "Random#bytes" do
it "returns a String" do
Random.new.bytes(1).should be_an_instance_of(String)
end
it "returns a String of the length given as argument" do
Random.new.bytes(15).length.should == 15
end
it "returns an ASCII-8BIT String" do
Random.new.bytes(15).encoding.should == Encoding::ASCII_8BIT
end
it "returns the same output for a given seed" do
Random.new(33).bytes(2).should == Random.new(33).bytes(2)
end
# Should double check this is official spec
it "returns the same numeric output for a given seed across all implementations and platforms" do
rnd = Random.new(33)
rnd.bytes(2).should == "\x14\\"
rnd.bytes(1000) # skip some
rnd.bytes(2).should == "\xA1p"
end
it "returns the same numeric output for a given huge seed across all implementations and platforms" do
rnd = Random.new(bignum_value ** 4)
rnd.bytes(2).should == "_\x91"
rnd.bytes(1000) # skip some
rnd.bytes(2).should == "\x17\x12"
end
it "returns a random binary String" do
Random.new.bytes(12).should_not == Random.new.bytes(12)
end
end
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