1require_relative '../../../spec_helper' 2 3ruby_version_is ''...'2.5' do 4 require 'mathn' 5 6 describe "Bignum#**" do 7 before :each do 8 @bignum = bignum_value(47) 9 end 10 11 it "returns self raised to other (positive) power" do 12 (@bignum ** 4).should == 7237005577332262361485077344629993318496048279512298547155833600056910050625 13 (@bignum ** 1.2).should be_close(57262152889751597425762.57804, TOLERANCE) 14 end 15 16 it "returns a complex number when negative and raised to a fractional power" do 17 ((-@bignum) ** (1/3)).should be_close(Complex(1048576,1816186.907597341), TOLERANCE) 18 ((-@bignum) ** (1.0/3)).should be_close(Complex(1048576,1816186.907597341), TOLERANCE) 19 end 20 end 21end 22