require File.expand_path("../../helper", __FILE__)

class MyCustomHtmlSafeString < String
end

class HtmlEscapeTest < Minitest::Test
  def test_escape_source_encoding_is_maintained
    source = 'foobar'
    str = EscapeUtils.escape_html_as_html_safe(source)
    assert_equal source.encoding, str.encoding
  end

  def test_escape_binary_encoding_is_maintained
    source = 'foobar'.b
    str = EscapeUtils.escape_html_as_html_safe(source)
    assert_equal source.encoding, str.encoding
  end

  def test_escape_uft8_encoding_is_maintained
    source = 'foobar'.encode 'UTF-8'
    str = EscapeUtils.escape_html_as_html_safe(source)
    assert_equal source.encoding, str.encoding
  end

  def test_escape_us_ascii_encoding_is_maintained
    source = 'foobar'.encode 'US-ASCII'
    str = EscapeUtils.escape_html_as_html_safe(source)
    assert_equal source.encoding, str.encoding
  end

  def test_escape_basic_html_with_secure
    assert_equal "&lt;some_tag&#47;&gt;", EscapeUtils.escape_html("<some_tag/>")

    secure_before = EscapeUtils.html_secure
    EscapeUtils.html_secure = true
    assert_equal "&lt;some_tag&#47;&gt;", EscapeUtils.escape_html("<some_tag/>")
    EscapeUtils.html_secure = secure_before
  end

  def test_escape_basic_html_without_secure
    assert_equal "&lt;some_tag/&gt;", EscapeUtils.escape_html("<some_tag/>", false)

    secure_before = EscapeUtils.html_secure
    EscapeUtils.html_secure = false
    assert_equal "&lt;some_tag/&gt;", EscapeUtils.escape_html("<some_tag/>")
    EscapeUtils.html_secure = secure_before
  end

  def test_escape_double_quotes
    assert_equal "&lt;some_tag some_attr=&quot;some value&quot;&#47;&gt;", EscapeUtils.escape_html("<some_tag some_attr=\"some value\"/>")
  end

  def test_escape_single_quotes
    assert_equal "&lt;some_tag some_attr=&#39;some value&#39;&#47;&gt;", EscapeUtils.escape_html("<some_tag some_attr='some value'/>")
  end

  def test_escape_ampersand
    assert_equal "&lt;b&gt;Bourbon &amp; Branch&lt;&#47;b&gt;", EscapeUtils.escape_html("<b>Bourbon & Branch</b>")
  end

  def test_returns_original_if_not_escaped
    str = 'foobar'
    assert_equal str.object_id, EscapeUtils.escape_html(str).object_id
  end

  def test_html_safe_escape_default_works
    str = EscapeUtils.escape_html_as_html_safe('foobar')
    assert_equal 'foobar', str
  end

  def test_returns_custom_string_class
    klass_before = EscapeUtils.html_safe_string_class
    EscapeUtils.html_safe_string_class = MyCustomHtmlSafeString

    str = EscapeUtils.escape_html_as_html_safe('foobar')
    assert_equal 'foobar', str
    assert_equal MyCustomHtmlSafeString, str.class
    assert_equal true, str.instance_variable_get(:@html_safe)
  ensure
    EscapeUtils.html_safe_string_class = klass_before
  end

  def test_returns_custom_string_class_when_string_requires_escaping
    klass_before = EscapeUtils.html_safe_string_class
    EscapeUtils.html_safe_string_class = MyCustomHtmlSafeString

    str = EscapeUtils.escape_html_as_html_safe("<script>")
    assert_equal "&lt;script&gt;", str
    assert_equal MyCustomHtmlSafeString, str.class
    assert_equal true, str.instance_variable_get(:@html_safe)
  ensure
    EscapeUtils.html_safe_string_class = klass_before
  end

  def test_html_safe_string_class_descends_string
    assert_raises ArgumentError do
      EscapeUtils.html_safe_string_class = Hash
    end

    begin
      EscapeUtils.html_safe_string_class = String
      EscapeUtils.html_safe_string_class = MyCustomHtmlSafeString
    rescue ArgumentError => e
      assert_nil e, "#{e.class.name} raised, expected nothing"
    end
  end

  def test_utf8_or_ascii_input_only
    str = "<b>Bourbon & Branch</b>"

    str.force_encoding 'ISO-8859-1'
    assert_raises Encoding::CompatibilityError do
      EscapeUtils.escape_html(str)
    end

    str.force_encoding 'UTF-8'
    begin
      EscapeUtils.escape_html(str)
    rescue Encoding::CompatibilityError => e
      assert_nil e, "#{e.class.name} raised, expected not to"
    end
  end

  def test_return_value_is_tagged_as_utf8
    str = "<b>Bourbon & Branch</b>".encode('utf-8')
    assert_equal Encoding.find('UTF-8'), EscapeUtils.escape_html(str).encoding
  end
end