File: size_spec.rb

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

describe "Bignum#size" do

  compliant_on :ironruby do
    it "returns the number of bytes in the machine representation in multiples of four" do
      (256**7).size.should == 8
      (256**8).size.should == 12
      (256**9).size.should == 12
      (256**10).size.should == 12
      (256**10-1).size.should == 12
      (256**11).size.should == 12
      (256**12).size.should == 16
      (256**20-1).size.should == 20
      (256**40-1).size.should == 40
    end
  end

  deviates_on :rubinius, :jruby do
    it "returns the number of bytes in the machine representation" do
      (256**7).size   .should == 8
      (256**8).size   .should == 9
      (256**9).size   .should == 10
      (256**10).size  .should == 11
      (256**10-1).size.should == 10
      (256**11).size   .should == 12
      (256**12).size   .should == 13
      (256**20-1).size .should == 20
      (256**40-1).size .should == 40
    end
  end

  deviates_on :maglev do
    it "returns the number of bytes in the machine representation in multiples of four" do
      (256**7).size   .should ==  8
      (256**8).size   .should == 16
      (256**9).size   .should == 16
      (256**10).size  .should == 16
      (256**10-1).size.should == 16
      (256**11).size  .should == 16
      (256**12).size  .should == 20
      (256**20-1).size.should == 24
      (256**40-1).size.should == 44
    end
  end
end