require 'set'

describe "Set#==" do
  it "returns true when the passed Object is a Set and self and the Object contain the same elements" do
    Set[].should == Set[]
    Set[1, 2, 3].should == Set[1, 2, 3]
    Set["1", "2", "3"].should == Set["1", "2", "3"]

    Set[1, 2, 3].should_not == Set[1.0, 2, 3]
    Set[1, 2, 3].should_not == [1, 2, 3]
  end

  it "does not depend on the order of the elements" do
    Set[1, 2, 3].should == Set[3, 2, 1]
    Set[:a, "b", ?c].should == Set[?c, "b", :a]
  end

  ruby_version_is "" ... "1.8.7" do
    it "does depend on the order of nested Sets" do
      Set[Set[1], Set[2], Set[3]].should_not == Set[Set[3], Set[2], Set[1]]

      set1 = Set[Set["a", "b"], Set["c", "d"], Set["e", "f"]]
      set2 = Set[Set["c", "d"], Set["a", "b"], Set["e", "f"]]
      set1.should_not == set2
    end
  end

  ruby_version_is "1.8.7" do
    it "does not depend on the order of nested Sets" do
      Set[Set[1], Set[2], Set[3]].should == Set[Set[3], Set[2], Set[1]]

      set1 = Set[Set["a", "b"], Set["c", "d"], Set["e", "f"]]
      set2 = Set[Set["c", "d"], Set["a", "b"], Set["e", "f"]]
      set1.should == set2
    end
  end
end
