require "spec/spec_helper"

module RR
  describe HashWithObjectIdKey do
    describe "#[] and #[]=" do
      it "stores object via object id" do
        hash = HashWithObjectIdKey.new
        array_1 = []
        hash[array_1] = 1
        array_2 = []
        hash[array_2] = 2

        hash[array_1].should_not == hash[array_2]
      end

      it "stores the passed in object" do
        hash = HashWithObjectIdKey.new
        obj = Object.new
        hash[obj] = 1
        hash.instance_eval {@keys}.should == {obj.__id__ => obj}
      end
    end

    describe "#each" do
      it "iterates through the items in the hash" do
        hash = HashWithObjectIdKey.new
        hash['one'] = 1
        hash['two'] = 2

        keys = []
        values = []
        hash.each do |key, value|
          keys << key
          values << value
        end

        keys.sort.should == ['one', 'two']
        values.sort.should == [1, 2]
      end
    end

    describe "#delete" do
      before do
        @hash = HashWithObjectIdKey.new
        @key = Object.new
        @hash[@key] = 1
      end

      it "removes the object from the hash" do
        @hash.delete(@key)
        @hash[@key].should == {}
      end

      it "removes the object from the keys hash" do
        @hash.delete(@key)
        @hash.instance_eval {@keys}.should == {}
      end
    end

    describe "#keys" do
      before do
        @hash = HashWithObjectIdKey.new
        @key = Object.new
        @hash[@key] = 1
      end

      it "returns an array of the keys" do
        @hash.keys.should == [@key]
      end
    end

    describe "#include?" do
      before do
        @hash = HashWithObjectIdKey.new
        @key = Object.new
        @hash[@key] = 1
      end

      it "returns true when the key is in the Hash" do
        @hash.should include(@key)
      end

      it "returns false when the key is not in the Hash" do
        @hash.should_not include(Object.new)
      end
    end
  end
end