require File.expand_path('../../../spec_helper', __FILE__)

describe "Integer#to_r" do
  ruby_version_is "1.9" do
    it "returns a Rational object" do
      309.to_r.should be_an_instance_of(Rational)
    end

    it "constructs a rational number with self as the numerator" do
      34.to_r.numerator.should == 34
    end

    it "constructs a rational number with 1 as the denominator" do
      298.to_r.denominator.should == 1
    end

    it "works even if self is a Bignum" do
      bignum = 99999**999
      bignum.should be_an_instance_of(Bignum)
      bignum.to_r.should == Rational(bignum, 1)
    end

    it "raises an ArgumentError if given any arguments" do
      lambda { 287.to_r(2) }.should raise_error(ArgumentError)
      lambda { 9102826.to_r(309, [], 71) }.should raise_error(ArgumentError)
    end
  end
end
