File: superclass_spec.rb

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

describe "Class#superclass" do
  it "returns the superclass of self" do
    BasicObject.superclass.should be_nil
    Object.superclass.should == BasicObject
    Class.superclass.should == Module
    Class.new.superclass.should == Object
    Class.new(String).superclass.should == String
    Class.new(Integer).superclass.should == Integer
  end

  # redmine:567
  describe "for a singleton class" do
    it "of an object returns the class of the object" do
      a = CoreClassSpecs::A.new
      sc = class << a; self; end
      sc.superclass.should == CoreClassSpecs::A
    end

    it "of a class returns the singleton class of its superclass" do # sorry, can't find a simpler way to express this...
      sc = class << CoreClassSpecs::H; self; end
      sc.superclass.should == class << CoreClassSpecs::A; self; end
    end
  end
end