require File.dirname(__FILE__) + '/../test_helper'

class TruncateTest < Test::Unit::TestCase
  include ActionView::Helpers::TextHelper

  def test_short
    assert_equal "hello", truncate("hello")
    assert_equal "hello there this is a test nothing more", truncate("hello there this is a test nothing more", 50)
  end

  def test_long
    assert_equal "hello...", truncate("hello there", 3)
    assert_equal "hello there this is a test nothing...", truncate("hello there this is a test nothing more than that my good man")
  end

  def test_multibyte
    assert_equal "ɦɛĺłø...", truncate("ɦɛĺłø ŵőřļđ", 3)
    assert_equal "ɦɛĺłø ŵőřļđ", truncate("ɦɛĺłø ŵőřļđ", 12)
  end

  def test_new_calling_convention
    assert_equal "hello…", truncate("hello world", :length => 3, :omission => "…")
    assert_equal "hello world", truncate("hello world", :omission => "…")
    assert_equal "hello...", truncate("hello world", :length => 3)
  end
  
  def test_paragraph_truncate
    assert_equal "This line stands alone.…", truncate("This line stands alone.\nNobody should see this.", :length => 28, :avoid_orphans => true, :omission => "…")
  end
  
  def test_multi_paragraph_truncate
    (18..20).to_a.each do |len|
      assert_equal "Para 1\n\nPara 2...", truncate("Para 1\n\nPara 2\n\nPara 3", :length => len, :avoid_orphans => true)
    end
    assert_equal "Para 1\n\nPara 2\n\nPara 3", truncate("Para 1\n\nPara 2\n\nPara 3", :length => 22, :avoid_orphans => true)
  end
end