require File.expand_path('../../../../spec_helper', __FILE__)

process_is_foreground do
  with_feature :readline do
    require 'readline'

    describe "Readline::HISTORY.delete_at" do
      it "deletes and returns the history entry at the specified index" do
        Readline::HISTORY.push("1", "2", "3")

        Readline::HISTORY.delete_at(1).should == "2"
        Readline::HISTORY.size.should == 2

        Readline::HISTORY.delete_at(1).should == "3"
        Readline::HISTORY.size.should == 1

        Readline::HISTORY.delete_at(0).should == "1"
        Readline::HISTORY.size.should == 0


        Readline::HISTORY.push("1", "2", "3", "4")

        Readline::HISTORY.delete_at(-2).should == "3"
        Readline::HISTORY.size.should == 3

        Readline::HISTORY.delete_at(-2).should == "2"
        Readline::HISTORY.size.should == 2

        Readline::HISTORY.delete_at(0).should == "1"
        Readline::HISTORY.size.should == 1

        Readline::HISTORY.delete_at(0).should == "4"
        Readline::HISTORY.size.should == 0
      end

      it "raises an IndexError when the given index is greater than the history size" do
        lambda { Readline::HISTORY.delete_at(10) }.should raise_error(IndexError)
        lambda { Readline::HISTORY.delete_at(-10) }.should raise_error(IndexError)
      end

      it "taints the returned strings" do
        Readline::HISTORY.push("1", "2", "3")
        Readline::HISTORY.delete_at(0).tainted?.should be_true
        Readline::HISTORY.delete_at(0).tainted?.should be_true
        Readline::HISTORY.delete_at(0).tainted?.should be_true
      end
    end
  end
end
