Extract rendering to helper method. Shift filename sanitization to controller.

test/helpers/rendering_helper_test.rb

@@ -0,0 +1,35 @@
+require "test_helper"
+
+class RenderingHelperTest < ActionView::TestCase
+  include RenderingHelper
+
+  test "auto_link_message" do
+    html = "This is a sample with a message - message://<123456789>. There we go."
+    rendered_html = auto_link_message(html)
+    assert(
+      rendered_html.include?(%|<a href="message://&lt;123456789&gt;">message://&lt;123456789&gt;</a>|),
+      "Message was not correctly rendered. Rendered message:\n#{rendered_html}"
+    )
+
+    html = %|This message is already tagged: <a href="message://<12345>">Call bob</a>."|
+    rendered_html = auto_link_message(html)
+    assert_equal(html, rendered_html)
+  end
+
+  test "textile" do
+    raw_textile = "This should end up *strong*."
+    rendered_textile = textile(raw_textile)
+    assert_equal("<p>This should end up <strong>strong</strong>.</p>", rendered_textile)
+  end
+
+  test "render_text" do
+    simple_textile = render_text("This is *strong*.")
+    assert_equal("<p>This is <strong>strong</strong>.</p>", simple_textile)
+
+    autolink_message = render_text("Call message://<123>.")
+    assert_equal(%|<p>Call <a href="message://&lt;123&gt;">message://&lt;123&gt;</a>.</p>|, autolink_message)
+
+    onenote_links = render_text(%|Link to onenote <a href="onenote://foobar">here</a>.|)
+    assert_equal(%|<p>Link to onenote <a href="onenote://foobar">here</a>.</p>|, onenote_links)
+  end
+end