File: to_s_spec.rb

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require_relative '../../spec_helper'

describe "NilClass#to_s" do
  it "returns the string ''" do
    nil.to_s.should == ""
  end

  it "returns a frozen string" do
    nil.to_s.should.frozen?
  end

  it "always returns the same string" do
    nil.to_s.should equal(nil.to_s)
  end
end