resolves #4101 add support for role on thematic break to HTML converter (PR #4196)

3 files changed, 13 insertions, 1 deletions

diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 4a81cdb4..92baab56 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -25,6 +25,7 @@ Enhancements::
   * Allow section ID to be unset by assigning an empty value to the `id` block attribute (#4139)
   * Add support for dropping principal text of list item if empty in an ordered or unordered list when converting to man page (#4182)
   * Don't add empty line before block content if principal text of dlist item is not specified when converting to man page (#4182)
+  * Add support for role on thematic break in HTML converter (#4101)
 
 Compliance::
 
diff --git a/lib/asciidoctor/converter/html5.rb b/lib/asciidoctor/converter/html5.rb
index 4056fb96..891ec6ce 100644
--- a/lib/asciidoctor/converter/html5.rb
+++ b/lib/asciidoctor/converter/html5.rb
@@ -839,7 +839,8 @@ Your browser does not support the audio tag.
   end
 
   def convert_thematic_break node
-    %(<hr#{@void_element_slash}>)
+    class_attribute = node.role ? %( class="#{node.role}") : ''
+    %(<hr#{class_attribute}#{@void_element_slash}>)
   end
 
   def convert_sidebar node
diff --git a/test/blocks_test.rb b/test/blocks_test.rb
index d5e86d73..a6953d37 100644
--- a/test/blocks_test.rb
+++ b/test/blocks_test.rb
@@ -61,6 +61,16 @@ context 'Blocks' do
       assert_xpath '/hr/following-sibling::*', output, 1
     end
 
+    test 'horizontal rule with role' do
+      input = <<~'EOS'
+      [.fancy]
+      '''
+      EOS
+      output = convert_string_to_embedded input
+      assert_css 'hr', output, 1
+      assert_css 'hr.fancy', output, 1
+    end
+
     test 'page break' do
       output = convert_string_to_embedded %(page 1\n\n<<<\n\npage 2)
       assert_xpath '/*[@class="page-break"]', output, 1