+ assert_equal "have src", r.image_alt
+ end
+
+ def test_markdown_no_description
+ r = RichText.new("markdown", "#Nope")
+ assert_nil r.description
+ end
+
+ def test_markdown_description
+ r = RichText.new("markdown", "This is an article about something.")
+ assert_equal "This is an article about something.", r.description
+ end
+
+ def test_markdown_description_after_heading
+ r = RichText.new("markdown", "#Heading\n\nHere starts the text.")
+ assert_equal "Here starts the text.", r.description
+ end
+
+ def test_markdown_description_elements
+ r = RichText.new("markdown", "*Something* **important** [here](https://example.com/).")
+ assert_equal "Something important here.", r.description
+ end
+
+ def test_markdown_html_description
+ r = RichText.new("markdown", "<p>Can use HTML tags.</p>")
+ assert_equal "Can use HTML tags.", r.description
+ end
+
+ def test_markdown_description_max_length
+ r = RichText.new("markdown", "x" * RichText::MAX_DESCRIPTION_LENGTH)
+ assert_equal "x" * RichText::MAX_DESCRIPTION_LENGTH, r.description
+
+ r = RichText.new("markdown", "y" * (RichText::MAX_DESCRIPTION_LENGTH + 1))
+ assert_equal "#{'y' * (RichText::MAX_DESCRIPTION_LENGTH - 3)}...", r.description
+
+ r = RichText.new("markdown", "*zzzzzzzzz*z" * ((RichText::MAX_DESCRIPTION_LENGTH + 1) / 10.0).ceil)
+ assert_equal "#{'z' * (RichText::MAX_DESCRIPTION_LENGTH - 3)}...", r.description