require File.dirname(__FILE__) + '/../../../spec_helper'
require 'readline'

describe "Readline::HISTORY.<<" do
  it "appends the given Object to the history" do
    Readline::HISTORY << "1"
    Readline::HISTORY.size.should == 1
    
    Readline::HISTORY << "2"
    Readline::HISTORY.size.should == 2
    
    Readline::HISTORY.pop.should == "2"
    Readline::HISTORY.pop.should == "1"
  end
  
  it "tries to convert the passed Object to a String using #to_str" do
    obj = mock("Converted to String")
    obj.should_receive(:to_str).and_return("converted")
    
    Readline::HISTORY << obj
    Readline::HISTORY.pop.should == "converted"
  end
  
  it "raises a TypeError when the passed Object can't be converted to a String" do
    lambda { Readline::HISTORY << mock("Object") }.should raise_error(TypeError)
  end
end
