ruby_version_is "1.9" do
  describe "Random.new" do
    it "returns a new instance of Random" do
      Random.new.should be_an_instance_of(Random)
    end

    it "uses a random seed value if none is supplied" do
      Random.new.seed.should be_an_instance_of(Bignum)
    end

    it "returns Random instances initialized with different seeds" do
      first = Random.new
      second = Random.new
      (0..20).map { first.rand } .should_not == (0..20).map { second.rand }
    end

    it "accepts an Integer seed value as an argument" do
      Random.new(2).seed.should == 2
    end

    it "accepts (and truncates) a Float seed value as an argument" do
      Random.new(3.4).seed.should == 3
    end

    it "accepts (and converts to Integer) a Rational seed value as an argument" do
      Random.new(Rational(20,2)).seed.should == 10
    end

    it "accepts (and converts to Integer) a Complex (without imaginary part) seed value as an argument" do
      Random.new(Complex(20)).seed.should == 20
    end

    it "raises a RangeError if passed a Complex (with imaginary part) seed value as an argument" do
      lambda do
        Random.new(Complex(20,2))
      end.should raise_error(RangeError)
    end
  end
end
