spec/ruby/core/integer/pred_spec.rb


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require_relative '../../spec_helper'

describe "Integer#pred" do
  it "returns the Integer equal to self - 1" do
    0.pred.should eql(-1)
    -1.pred.should eql(-2)
    bignum_value.pred.should eql(bignum_value(-1))
    fixnum_min.pred.should eql(fixnum_min - 1)
    20.pred.should eql(19)
  end
end