require "test/unit"
require "htmlentities"

class HtmlentitiesTest < Test::Unit::TestCase
  RAW_TEXT = "<p></p>"
  ENCODED_TEXT = "&lt;p&gt;&lt;/p&gt;"
  
  def test_should_apply_destructive_htmlentities_method
    text = RAW_TEXT.dup
    assert_equal(ENCODED_TEXT, text.htmlentities!)
    assert_equal(ENCODED_TEXT, text)
  end
  
  def test_should_apply_non_destructive_htmlentities_method
    text = RAW_TEXT
    assert_equal(ENCODED_TEXT, text.htmlentities)
    assert_not_equal(ENCODED_TEXT, text)
    assert_equal(RAW_TEXT, text)
  end
  
  def test_should_apply_destructive_unhtmlentities_method
    text = ENCODED_TEXT.dup
    assert_equal(RAW_TEXT, text.unhtmlentities!)
    assert_equal(RAW_TEXT, text)
  end
  
  def test_should_apply_non_destructive_unhtmlentities_method
    text = ENCODED_TEXT
    assert_equal(RAW_TEXT, text.unhtmlentities)
    assert_not_equal(RAW_TEXT, text)
    assert_equal(ENCODED_TEXT, text)
  end
end