gistfile1.txt

      ruby_bug "#5713", "2.0" do
        it "returns Rational(0) when self is Rational(0) and the exponent is positive" do
          (Rational(0) ** bignum_value).should eql(Rational(0))
        end

        it "raises ZeroDivisionError when self is Rational(0) and the exponent is negative" do
          lambda { Rational(0) ** -bignum_value }.should raise_error(ZeroDivisionError)
        end

        it "returns Rational(1) when self is Rational(1)" do
          (Rational(1) **  bignum_value).should eql(Rational(1))
          (Rational(1) ** -bignum_value).should eql(Rational(1))
        end

        it "returns Rational(1) when self is Rational(-1) and the exponent is even" do
          (Rational(-1) ** bignum_value(0)).should eql(Rational(1))
          (Rational(-1) ** bignum_value(2)).should eql(Rational(1))
        end

        it "returns Rational(-1) when self is Rational(-1) and the exponent is odd" do
          (Rational(-1) ** bignum_value(1)).should eql(Rational(-1))
          (Rational(-1) ** bignum_value(3)).should eql(Rational(-1))
        end
      end