spec/ruby/core/numeric/real_spec.rb


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require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Numeric#real" do
  before :each do
    @numbers = [
      20,             # Integer
      398.72,         # Float
      Rational(3, 4), # Rational
      bignum_value,   # Bignum
      infinity_value,
      nan_value
    ].map{ |n| [n, -n] }.flatten
  end

  it "returns self" do
    @numbers.each do |number|
      if number.to_f.nan?
        number.real.nan?.should be_true
      else
        number.real.should == number
      end
    end
  end

  it "raises an ArgumentError if given any arguments" do
    @numbers.each do |number|
      -> { number.real(number) }.should raise_error(ArgumentError)
    end
  end
end

describe "Numeric#real?" do
  it "returns true" do
    NumericSpecs::Subclass.new.should.real?
  end
end