spec/ruby/core/integer/ceil_spec.rb


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require_relative '../../spec_helper'
require_relative 'shared/to_i'
require_relative 'shared/integer_rounding'

describe "Integer#ceil" do
  it_behaves_like :integer_to_i, :ceil
  it_behaves_like :integer_rounding_positive_precision, :ceil

  context "precision argument specified as part of the ceil method is negative" do
    it "returns the smallest integer greater than self with at least precision.abs trailing zeros" do
      18.ceil(-1).should eql(20)
      18.ceil(-2).should eql(100)
      18.ceil(-3).should eql(1000)
      -1832.ceil(-1).should eql(-1830)
      -1832.ceil(-2).should eql(-1800)
      -1832.ceil(-3).should eql(-1000)
    end
  end
end